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Safety Modules INSTALLATION SUPPLEMENTRev41510

Smartscan Incorporated32841 Eight Mile RoadLivonia, MI 48152Phone: (248) 477-2900Fax: (248) 477-7453

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SMARTSCAN INCORPORATED

Livonia, MICHIGAN

1000

The use of this document is reserved exclusively for the use of Smartscan Incorporated

customers and personnel. The information and drawings contained herein are the soleproperty of Smartscan Incorporated, and shall not be disclosed to any third party withoutthe prior written consent for Smartscan Incorporated. Smartscan Incorporated makes nowarranty of any kind with regard to this material, including but not limited to, impliedwarranties or fitness for a particular purpose. The information in this document issubject to change without notice. Smartscan shall not be liable for any errors containedherein for incidental or consequential damages in connection with the performance of use of this material.

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The MFU-1(011-149) is effectively a safety relay module, and, just like any other

proprietary safety relay it provides relay output switching contacts and a choice of control functions, for example auto/manual reset and external device monitoring.

An, MFU-2 (011-150) has much more to offer. Not only does it provide inputs for theemergency stop function but it also has two further sets of inputs for connecting up totwo light curtains. The monitored output switching contacts are rated at 250V AC, 2Awith two additional electronic outputs for status indication etc. Other features includeselectable auto/manual reset modes, external device monitoring (EDM) and LEDindicators for all input and output channels. The unit is automatically self-testing andwith simultaneous monitoring between related channels it ensures the unit is suitable for Category 4 control systems as defined in BS EN 954-1.

MFU-M1 (011-151) further enhances the Smartscan range of multifunction safety units.The unit incorporates a light curtain muting facility, designed specifically for thosesystems that require the light curtain detection zone to be inhibited, or muted, duringspecific periods of a machine’s operating cycle. Muting provides a control function thatallows access through the light curtain for the passage of material or for a person toload and unload parts through the light curtain during safe periods without interruptingthe machines operating cycle.

MFU-M1 (011-151) provides a dual channel safety monitored input for automaticallymuting the light curtain during safe periods of machine operation. Mute signals areoften derived from the machine control system or from external sensors or switches. Italso provides dual inputs for a Series 1000 light curtain and a two-channel emergencystop system.

Safe Modules 1

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The monitored safety output relay switches are rated at 250V AC, 2A, for connection toa power-switching device or directly to a machines final control element. Two electronicoutputs are provided one for guard status indication and the other to indicate a ‘mute on’condition. Both are for direct connection to a PLC or indicator lamps etc.

Other features include selectable auto/manual reset modes, external device monitoring(EDM) and LED indicators on all inputs and outputs.

Monitoring between associated input channels ensures the unit is suitable for Category 3control systems as defined in BS EN 954-1.

RY4A (050-005) provides a simple low cost safety relay output option for the T4 Series.Two (2) normally open safety relay contacts rated at 250V AC, 6A and one (1) normallyclosed auxiliary (non-safety) contact rated at 250V AC, 6A. T4 Series functionsmirrored include, auto/manual reset, EDM, mute inputs, mute output and status.

RY4B (050-010) Additional contacts offer a more versatile safety relay option whenintegrating into more complex applications. Three(3) normally open safety relaycontacts rated at 250V AC, 6A, and one(1) normally closed auxiliary (non-safety) relaycontact rated at 250V AC, 6A. T4 Series functions mirrored include, auto/manualreset, EDM, mute inputs, mute output and status.

MFU-RE10 (011-153) is an output switching expansion module. The unit provides 8N/O and 2 N/C switching contacts each rated at 250V AC 4A.

The expansion module operates in conjunction with MFU’s MFU-1, MFU-2, MFU-

M1,RY4A and RY4B ,to provide additional output switching contacts that may berequired for a particular application.

SAFETY MODULES 2

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Safety Module: MFU-1 (Single Light Curtain)

Status Indicators

Function Color StatusPower Red LED ON when power ON

Inputs Green LED ON when input ONEDM Amber ON when EDM active

N.O. Contact

N.C. Contact

Common

Common

N.C. Contact

N.O. Contact

MFU-1 SAFETY MODULE 3

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Features: MFU-1 (Single Light Curtain)

Dual safety inputs for connecting the light curtainSafety monitored output relays. Contacts rated at 250V AC, 4A

Auxiliary electronic output for status indication etc.Reset functionExternal Device Monitor (EDM)LED status indicatorsDin rail mounting - 70mm enclosure

Built to BS EN 954-1 Category 3

Specification: MFU-1

Response time 10ms max

Operating temperature 0° to +50°CEnclosure rating IP40Enclosure 70mm DIN rail mounting

(HxWxD) 90x70x60mmPower supply requirements 24V DC ± 10% reg

Current consumption 100mA (NO LOAD)Status indicators LEDs, power on + lockout + outputClassification BS EN 954-1 Category 3

INPUTS

Dual safety monitored inputs 24V DC = ON, 0V = OFF

External device monitoring(EDM)

Use voltage free switch contacts (N/O &N/C)

Reset function (selectable) Use voltage free switch contacts

OUTPUTS

Safety output relays 2 x fail safe change over contacts, eachrated at 250V AC, 4A

Auxiliary solid-state switch(non safety)

1 electronic output switch, rated at24V DC, 500mA


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Electrical connections: MFU-1 (Single Light Curtain)

Terminals A1 and A2 – Power supply input - Connect a suitably stabilized 24V DC

power supply to terminals A1 = +24V DC and A2 = 0V DC. The current consumption of the MFU with no load applied on the output switching terminals is 100mA.

Terminal A3 and A4 – Automatic reset mode - Link terminal A3 to terminal A4 if automatic reset is required. In the automatic reset mode no connections are required atterminal B7 and terminal B8.

Terminals A5 and A6 – External device monitor (EDM) - Auxiliary change over contacts, from an external power-switching device are connected across terminals A5and A6. The monitoring circuit checks that the power switching devices both de-energize at the same time the MFU safety output switches de-energize. If one of the

power switching devices fail to de-energize at this time the MFU will trip.

If the EDM circuit is not used it is necessary to link terminals A5 to A6 otherwise thesystem will default into a lockout condition.

Terminals A7 and A8 – no connections

Terminal A9 – Auxiliary electronic switching output - The Auxiliary switching outputshould only be used for non-safety critical applications. For example connecting anindicator lamp or as feedback to a PLC to the safety outputs have de-energized.

The auxiliary output, derived from safety input OSSD2, energizes when output switches1 and 2 energize. Auxiliary output ON = 24V DC and OFF = 0V DC.

Terminal A10, A11 and A12 – Safety output 1 switch contacts - Terminals A10, A11and A12 are the output connections to safety relay 1 changeover switching contacts.Terminal A11 is the common output, with terminal A12 as the normally open switch and

A10 as the normally closed switch. Normally, terminals A11 and A12 would beconnected to one channel of a machine’s stop circuitry. For example, via an externalpower-switching relay or directly to a safe PLC input or a machines final controlelement.

Terminals B1 – 24V DC supply- + 24V DC output for connecting to the light curtain TX.

Terminals B2 – 0V DC supply - 0V DC output for connecting to the light curtain TX.

Terminals B3 – 24V DC supply - + 24V DC output for connecting to the light curtainRX.

Terminals B4 – 0V DC supply - 0V DC output for connecting to the light curtain RX.


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Electrical connections: MFU-1 (Single Light Curtain)

Terminal B5 and B6 – light curtain inputs (OSSD1 and OSSD2) - Connect the

electronic output switches (OSSD1 and OSSD2) of a 1000 Series light curtain toterminals B5 and B6 respectively.

Terminals B7 and B8 – Reset - If the MFU is required to be in the latch mode asuitable switch should be connected between terminal B7and terminal B8. If the safetyoutput relays de-energize a depression of the switch is required to re-energize theoutput switches to an ON condition.

The MFU’s safety output switches will only re-energize when the reset switch isdepressed and then released.

If the MFU is required to operate in an automatic reset condition do not connect a switchto terminals B7 and B8. However, it is necessary to link terminal A3 to terminal A4before an automatic reset condition can be established.

Terminals B9 – No connections

Terminal B10, B11 and B12 – Safety output 2 switch contacts - Terminals B10, B11and B12 are the output connections to safety relay 2 changeover switching contacts.Terminal B11 is the common output, with terminal B12 as the normally open switch andB10 as the normally closed switch. Normally, terminals B11 and B12 would beconnected to one channel of a machine’s stop circuitry. For example, via an external

power switching relay or, directly to a safe PLC input or to a machines final controlelement. Connect terminals A5 and A6 to one channel of a machine’s stop circuitry.For example, via an external power-switching relay or, directly to a safe PLC input or amachines final control element.

Note: If a single channel safety circuit is used link terminals A12 and B11. Terminals A11 and B12 are thenconnected to the machine’s safety circuit. Connecting in this way links safety output switch 1 and safety

output switch 2 in a series configuration.


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Safety Module: MFU-2 (Dual Light Curtains)

Status Indicators

Function Color Status

Inputs Green LED ON when input ONOutputs Green LED ON when output ON

Reset Amber LED ON, when reset input ‘ON(Auto reset mode - LED on continuously)

EDM Amber ON when EDM inputs are active

StatusRed + Red

Steady ON = system okFlashing ON /OFF = lockout


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Features: MFU-2 (Dual Light Curtains)

Two dual safety inputs for connecting up to 2 light curtainsDual inputs for connecting the emergency stop circuitSafety monitored output relays. Contacts rated at 250V AC, 2A

Auxiliary electronic output switches for status indication etcReset functionExternal Device Monitoring (EDM)LED indicators for all inputs and outputsDIN rail mounting – 70mm enclosure

Automatic self-testingSimultaneous monitoring between related channels

Built to BS EN 954-1 Category 4

Specification: MFU-2

Response time 25ms maxOperating temperature 0° to +50°CEnclosure rating IP40

Enclosure 70mm DIN rail mounting(HxWxD) 90x70x60mm

Power supply 24V DC ± 10% reg

Current consumption 150mA (NO LOAD)Status indicators LEDs for all inputs and outputs

Classification BS EN 954-1 Category 4

NPUTS

Dual inputs for light curtain 1Dual inputs for light curtain 2

24V DC = ON, 0V = OFF - Disparitybetween related channels = 100ms max.

Dual inputs for emergency-stop circuit

Use voltage free switch contacts - Disparitybetween channels = 100ms max.


Use voltage free switch contacts (N/C)

Reset function (selectable) 24V DC = ON, 0V = OFF

UTPUTS

Safety output relays 2 x N/O - fail safe contacts, each rated at250V AC, 2A

Auxiliary solid-state switches(non safety)

2 electronic output switches, each rated at24V DC, 500mA


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Electrical connections: MFU-2 (Dual Light Curtains)

Terminals A1 and A2 – Power supply input - Connect a suitably stabilized 24V DCpower supply to terminals A1 = +24V DC and A2 = 0V DC. The current consumption of the MFU with no load applied on the output switching terminals is 150mA.

Terminals A3 and A4 – External device monitor (EDM) - Normally closed switchcontacts, in series from the external power switching devices are connected acrossterminals A3 and A4. The monitoring circuit checks that the power switching devicesboth de-energize at the same time the MFU safety output switches de-energize. If oneor both of the power switching devices fail to de-energize at this time the MFU goes intoa lockout condition, turning all output switches off.

To reset from a lockout condition it is necessary to remove the 24V DC supply from theMFU and then re-apply.

If the EDM circuit is not used it is necessary to link terminals A3 to A4 otherwise thesystem will go to a lockout condition at the next demand upon the safety system.

Terminals A5 and A6 – Safety output 1 switch contact - Connect terminals A5 and A6 to one channel of a machine’s stop circuitry. For example, via an external power-switching relay or directly to a safe PLC input or a machines final control element.


If a single channel safety circuit is used link terminals A6 and A7. Terminals A5 and A8are then connected to the machine’s safety circuit. Connecting in this way links safetyoutput switch 1 and safety output switch 2 in a series configuration.

Terminal A9 – No connection

Terminal A10 – Auxiliary electronic switching output 1 - The Auxiliary switchingoutput should only be used for non-safety critical application. For example connectingan indicator lamp or as feedback to a PLC to confirm the safety outputs have de-energized.


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Terminal A11 – Auxiliary electronic switching output 2 - The Auxiliary switchingoutput should only be used for non-safety critical applications. For example connectingan indicator lamp or as feedback to a PLC to confirm the safety outputs have de-energized.

Auxiliary outputs 1 and 2 both energize when safety output switches 1 and 2 energizeand both de-energize when the safety outputs de-energize. Auxiliary outputs ON = 24VDC and OFF = 0V DC.

Terminal A12 – Reset - If the MFU is required to be in the latch mode a suitable switchshould be connected between terminal A12 and the 24V DC supply. If the safety output

relays de-energize a depression of the switch is required to re-energize the outputswitches to an ON condition.


If the MFU is required to operate in an automatic reset condition do not connect a switchto terminal A12. However, it is necessary to link terminal A12 to terminal A10 before anautomatic reset condition can be established.

Terminal B1 and B2 – light curtain 1 inputs (OSSD1 and OSSD2) - Connect the electronic

output switches (OSSD1 and OSSD2) of a 1000 Series light curtain to terminals B1 andB2 respectively.

Terminal B3 and B4 – light curtain 2 inputs (OSSD1 and OSSD2) -

Connect the electronic output switches (OSSD1 and OSSD2) of a 1000 Series lightcurtain to terminals B3 and B4 respectively.

Important, if either terminal B1/B2 or, B3/B4 are not used; for example, if only one lightcurtain is employed for a particular application, it is necessary to link the unused inputterminals to the 24V DC supply. If not the MFU’s output switches will not energize.

Note: An internal circuit monitors disparity between the two input channels. If the inputs do not switchtogether (within 100ms of each other) the system will go into a lockout condition.

Note: An internal circuit monitors disparity between the two input channels. If the inputs do not switch

together (within 100ms of each other) the system will go into a lockout condition.


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Terminals B5/B6 and B7/B8 – dual channel emergency stop circuit -Connect one channel of the machines emergency stop circuit between terminals B5 andB6 and the second channel between terminals B7 and B8.

Important, if the emergency stop inputs are not used it is necessary to link terminals B5to B6 and terminals B7 to B8. If not the safety output switches will not energize.

Terminals B9 and B11 – 24V DC supply - Additional + 24V DC outputs for connectingto the light curtains etc.

Terminals B10 and B12 – 0V DC supply - Additional 0V DC outputs for connecting tothe light curtains etc.

Note: An internal circuit monitors for short circuits and switching disparity between the two input channels.

If the inputs do not switch together (within 100ms of each other) the system will go into a lockoutcondition. This configuration meets the requirements for ‘control reliability’ and cannot be used in a

single channel configuration.


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Safety Module: MFU-M1 (Single Light Curtain with mute)

Status Indicators


Inputs Green LED ON when input ONOutputs Green LED ON when output ONReset Amber LED ON, when reset input is ‘ONEDM Amber ON when EDM inputs are active

StatusRed + Red

Steady ON = system okFlashing ON /OFF = lockout

MFU-M1 SAFETY MODULE 12

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Features: MFU-M1 (Single light curtain with mute)

Dual safety inputs for connecting the light curtainDual inputs for muting the light curtain

Dual inputs for connecting the emergency stop circuitSafety monitored output relays. Contacts rated at 250V AC, 2A Auxiliary electronic output for mute indicationReset functionExternal Device Monitoring (EDM)LED indicators for all inputs and outputsDIN rail mounting – 70mm enclosure

Automatic self testingMonitoring between related channelsBuilt to BS EN 954-1 Category 3

Specification: MFU-M1 (Single light curtain with mute)Response time 25ms maxOperating temperature 0° to +50°CEnclosure rating IP40

Enclosure 70mm DIN rail mounting(HxWxD) 90x70x60mm

Power supply requirement 24V DC ± 10% regCurrent consumption 150mA (NO LOAD)Status indicators LEDs for all inputs and outputsClassification BS EN 954-1 Category 3

INPUTSDual inputs for light curtain 24V DC = ON, 0V = OFF - Disparity between

channels =500ms max.

Dual inputs for mute sensors 24V DC = ON, 0V = OFF - Disparity betweenchannels =10 secs. Max.

Dual inputs for emergency-stopcircuit

Use voltage free switch contacts - Disparitybetween channels =100 ms max.


Use voltage free switch contacts (N/C)

Reset function (selectable) 24V DC = ON, 0V = OFF

OUTPUTS

Safety output relays 2 x N/O - fail safe contacts, each rated at250V AC, 2A

Auxiliary solid-state switch(non safety)

Electronic output switch, rated at24V DC, 500mA

Auxiliary solid-state switch for mute indication

Electronic output switch, rated at24V DC, 500mA


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Electrical connections: MFU-M1 (Single light curtain with mute)

Terminals A1 and A2 – Power supply input - Connect a suitably stabilized 24V DC

power supply to terminals A1 = +24V DC and A2 = 0V DC. The current consumption of the MFU with no load applied on the output switching terminals is 150mA.

Terminals A3 and A4 – External device monitor (EDM) - Normally closed switchcontacts, in series from the external power switching devices are connected acrossterminals A3 and A4. The monitoring circuit checks that the power switching devicesboth de-energize at the same time the MFU safety output switches de-energize. If oneor both of the power switching devices fail to de-energize at this time the MFU goes intoa lockout condition, turning all output switches off.

To reset from a lockout condition it is necessary to remove the 24V DC supply from the

MFU and then re-apply.

If the EDM circuit is not used it is necessary to link terminals A3 to A4 otherwise thesystem will go to a lockout condition at the next demand upon the safety system.


Terminals A7 and A8 – Safety output 2 switch contact - Connect terminals A7 and A8 to one channel of a machine’s stop circuitry. For example, via an external power-

switching relay or directly to a safe PLC input or a machines final control element.

If a single channel safety circuit is used link terminals A6 and A7. Terminals A5 and A8are then connected to the machine’s safety circuit. Connecting in this way links safetyoutput switch 1 and safety output switch 2 in a series configuration.

Terminal A9 – No connection

Terminal A10 – Auxiliary electronic switching output 1 - The Auxiliary switchingoutput should only be used for non-safety critical application. For example connectingan indicator lamp or as feedback to a PLC to confirm the safety outputs have de-energized.

The auxiliary output energizes when safety output switches 1 and 2 energize and de-energizes when the safety outputs de-energize. Auxiliary output ON = 24V DC andOFF = 0V DC.


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Terminal A11 – Auxiliary electronic switch – mute output- The Auxiliary switchingcircuit energizes when the light curtain is muted, e.g. when suitable signals have been

applied to terminals B2 and B3. The output switch is normally used for connecting anindicator lamp or as feedback to a PLC to confirm safety light curtain inputs at terminalsB1 and B2 are overridden e.g. in a muted condition.

Terminal A12 – Reset - A suitable switch should be connected between terminal A12and the 24V DC supply. If the safety output relays de-energize a depression of theswitch is required to re-energize the output switches to an ON condition.


Terminal B1 and B2 – light curtain inputs (OSSD1 and OSSD2) - Connect theelectronic output switches (OSSD1 and OSSD2) of a light curtain to terminals B1 andB2 respectively.

Important: If terminal B1/B2 are not used it is necessary to link them to the 24V DCsupply. If not the MFU’s output switches will not energize.

Terminal B3 and B4 – mute input signals - Connect suitable mute initiating signals toterminals B3 and B4 respectively. The mute signals override the light curtains operationtherefore, the inputs should only be active during safe periods of the machinery’soperating cycle.

ote: An internal circuit monitors disparity between the two input channels. If the inputs do not switchtogether (within 100ms of each other) the system will go into a lockout condition.

ote: An internal circuit monitors disparity between the two mute input channels. If the inputs do not switch

within 10 seconds of each other the system will go into a lockout condition.


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Terminals B5/B6 and B7/B8 – dual channel emergency stop circuit - Connect onechannel of the machines emergency stop circuit between terminals B5 and B6 and thesecond channel between terminals B7 and B8.

Important, if the emergency stop inputs are not used; it is necessary to link terminalsB5 to B6 and terminals B7 to B8. If not the safety output switches will not energize.

Terminals B9 and B11 – 24V DC supply - Additional + 24V DC outputs for connectingto the light curtains etc.

Terminals B10 and B12 – 0V DC supply - Additional 0V DC outputs for connecting tothe light curtains etc.

Note: An internal circuit monitors for short circuits and switching disparity between the two input channels. If

the inputs do not switch together (within 100ms of each other) the system will go into a lockoutcondition. This configuration meets the requirements for ‘control reliability’ and cannot be used in a

single channel configuration.


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RY4A - SAFETY RELAY UNIT (020 – 005)

Status Indicators


Power Red LED ON when power ON

OSSD 1 Green LED ON when input ON

OSSD 2 Green LED ON when input ON

MON (EDM) Amber ON when EDM active

The RY4A is a relay module containing force guided relays to be used in safetyapplications where the relay monitoring, is provided by another safety component

such as a light curtain or emergency stop relay.

RY4A SAFETY MODULE 16

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Features – RY4A

Dual safety electronic inputs for connecting the light curtain Safety relay contacts rated at 250V AC, 6A Mirrors the full functionality of the T4 light curtain Auxiliary relay (non – safety) rated at 250V AC, 6A Dedicated connections for theT4 series safety light curtain Contacts for External Device Monitor (EDM) LED status indicators Din rail mounting - 70mm enclosure Complies with BS EN 954–1 Category 4, EN ISO 13849-1 PL e,

EN 61508 SIL3

Specification – Type RY4A

Response time 20ms max

Operating temperature 0° to 50°Enclosure rating IP40

Enclosure 70mm DIN rail mounting(H X W X D) 90 X 70 X 60 mm

Power supply requirement 24V DC ± 10% regulated

Current consumption 200mA (NO LOAD)Status indicators LED’s, Power On + Safety Input + EDMinput

Classification BS EN 954–1 Category 4,EN ISO 13849-1 PL e, EN 61508 SIL3

INPUTSDual Safety Electronic Inputs 24V DC = ON, 0V = OFFEDM Contacts Voltage free N/C contacts

Auxiliary Relay 24V DC = ON, 0V = OFF

OUTPUTSDual Safety Output Relays 2 x N/O fail safe relay contacts, each rated

at 250V AC, 6A

Auxiliary Output Relay(Non - Safety)

1 X N/C 250V AC, 6A


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Electrical connections - RY4A

Terminals A1 and A2 – Power supply input

Connect a suitably switching 24V DC power supply to terminals A1 = +24V DC and A2= 0V DC. The current consumption of the RY4A with no load is 200mA maximum.

Terminal A3Is not internally connected to the box.

It provides a junction point for terminating the user reset station to the light curtain reset.If the light curtain and RY4A relay are to be configured in ‘auto-reset’ mode connect a24V DC supply to this terminal instead of through a normally-open contact reset switch.

Terminals A4 and A9 – External Device Monitor (EDM)

Terminal A4 (Receiver Yellow wire) is an EDM input from the light curtain to the RY4Arelay.

Terminal A4 is internally connected via N/C contacts of the internal relays to Terminal A9.

Terminal A9, Auxiliary normally closed contacts primarily used for monitoring anexternal device (if required). E.g. contactors, safety relays (FSD) final switching deviceetc. There is a yellow LED connected to A9 which may be used as an indicator for faultfinding.

If Terminal A9 is not being used connect to 24V DC. In auto reset mode terminal A9needs to be connected to 0V DC.

Terminals A5 and A6 – Safety inputs – Relay coil inputs to be connected to thedevice which will energize the internal force guided relays by applying 24V DC. A5(Receiver Pink wire) and A6 (Receiver Grey wire) may be used for a light curtain input(OSSD1 and OSSD2) e.g. T4 series safety light curtain.

Terminals A7 and B7

Are internally connected contacts and may be used as link terminals.

When using the T4 Series light curtain A7 is used to connect the data link from theReceiver head, transmit signal (Blue wire). B7 is used to connect the data link from theTransmitter head, receive signal (Blue wire).

Terminals A8 and B8

Are internally connected contacts and may be used as link terminals.When using the T4 Series light curtain A8 is used to connect the data link from theReceiver head, receive signal (Red wire). B8 is used to connect the data link from theTransmitter head, transmit signal (Red wire).


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Terminals A10 and B10

Auxiliary normally-closed relay contact output (non-safety) 250V, 6A.

Terminals A11 and B11 – safety output 1 switch contact

Connect terminals A11 and B11 to one channel of the machines stop circuitry, for example, via an external power-switching relay, directly to a safe PLC input or amachines final control element.


Connect terminals A12 and B12 to one channel of the machines stop circuitry, for example, via an external power-switching relay, directly to a safe PLC input or amachines final control element.

If a single channel safety circuit is used link terminals B11 and A12. Terminals A11 andB12 are then connected to the machines safety circuit. Connecting in this way links

safety output switch 1 and safety output switch 2 in a series configuration.

Terminals B1 and B2

Provides an auxiliary 24V DC supply. This may be used for connection of the 24V DCsupply to the T4 Series light curtain. B1 = Receiver White wire, B2 = Transmitter Whitewire.

Terminals B3 and B4 -They are not internally connected. They can be used with the T4Series light curtain to provide the junction point for Mute 1 and Mute 2 input connectionsfrom the light curtain to the user. B3 = Transmitter Green wire, B4 = Transmitter Yellowwire.

Terminal B5 - It is internally connected to the auxiliary relay coil input, which willenergize the internal force guided relay by applying 24V DC.When using the T4 Series light curtain the status output from the light curtain isconnected to this terminal to drive the auxiliary relay.

Terminal B6 - It is not internally connected. When using the T4 Series light curtain it isused as a junction point to provide the connection for the muteoutput signal to the user. B6 = Transmitter Grey Wire.

Terminal B9 - It is not internally connected. This connection may be used as a junctionpoint for shield / earth connection for the light curtain.

Note: Some outer legends refer to the application of the unit to a T4light curtain and should be disregarded otherwise.


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Internal Connections – RY4A

ACTIVATE

RED LED B1 OR A1 = 24VYEL LED A9 = 24VK1 A5 = 24VK2 A6 = 24VK3 B5 = 24V


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RY4B - SAFETY RELAY UNIT (020 – 010)

Status Indicators


Power Red LED ON when power ON

OSSD1 Green LED ON when output 1 ON

OSSD2 Green LED ON when output 2 ON

The RY4B is a relay module containing force guided relays to beused in safety applications where the relay monitoring, is provided byanother safety component such as a light curtain or emergency stoprelay.

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Features – RY4B

Dual safety electronic inputs for connecting the light curtain

Safety relay contacts rated at 250V AC, 6A Mirrors the full functionality of the T4 light curtain Auxiliary relay (non-safety) rated at 250V AC, 6A Dedicated connections for the T4 series safety light curtain Contacts for External Device Monitor (EDM) LED status indicators Din rail mounting - 70mm enclosure

Complies with BS EN 954–1, Category 4, EN ISO13849-1 PL e,EN61508, SIL3

Specification – Type RY4BResponse time 20ms maxOperating temperature 0° to 50° C

Enclosure rating IP40Enclosure 70mm DIN rail mounting

(H x W x D) 90 x 70 x 60 mm

Power supply requirement 24V DC ± 10% regulatedCurrent consumption 200mA (NO LOAD)

Status indicators LED’s, Power On + Safety OutputClassification BS EN 954–1, Category 4, EN ISO13849-

1 PL e, EN61508, SIL3

INPUTSDual Safety Electronic Inputs 24V DC = ON, 0V = OFFEDM Contacts Voltage free N/C contacts

OUTPUTSDual Safety Output Relays 2 x N/O fail safe relay contacts, each rated at

250V AC, 6A Auxiliary Output Relay(Non - Safety)

1 X N/C 250V AC, 6A


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Electrical connections - RY4B

Terminal A1

Provides connection for the supply shield / ground.

Terminals A2 and A3 – Power supply input

Connect a suitably stabilised 24V DC power supply to terminals A2 = +24V DC and A3= 0V DC. The current consumption of the RY4B with no load is 200mA maximum.

Terminals A4 and A5

They are not internally connected. They can be used with the T4 Series light curtain toprovide the junction point for Mute 1 and Mute 2 input connections from the light curtainto the user. A4 = Transmitter Green wire A5 = Transmitter Yellow wire.

Terminal A6

It is not internally connected. For T4 Series light curtain it is used as a junction point toprovide the connection for the mute output signal to the user. A6 = Transmitter Greywire

Terminal A7

It is not internally connected to the box.

It provides a junction point for terminating the user reset station to the light curtain reset.If the light curtain and RY4B relay are to be configured in ‘auto-reset’ mode connect a24V DC supply to this terminal instead of through a normally-open contact reset switch.

Terminals A8 and B8 - External Device Monitor (EDM)

Terminal B8 (Receiver Yellow wire) is an EDM input from the light curtain to the RY4Brelay.

Terminal B8 is internally connected via N/C contacts of the internal relays to Terminal A8.

Terminal A8, Auxiliary normally closed contacts primarily used for monitoring anexternal device (if required). E.g. contactors, safety relays (FSD) final switching deviceetc.

If Terminal A8 is not being used connect to 24V DC. In auto reset mode terminal A8needs to be connected to 0V DC.

Terminals A9 and B9

Auxiliary (non-safety) normally-closed relay contact output 250V, 6A

Terminal A10 and B10 – safety output 1 switch contact

Provides a N/O safety relay output contact to be used in the safety circuit, e.g.connecting one channel of the machines stop circuit directly to a safety PLC input or amachines final control element.


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Electrical connections - RY4B





Terminal B1

Provides connection for the shield / ground. This may be used

for the T4 series light curtain. B1 = Receiver Shield and Transmitter Shieldconnection.

Terminals B2 and B3

Provides an auxiliary 24V DC supply. This may be used for connection of the 24V DCsupply to the T4 Series light curtain.B2 = Transmitter White wire and Receiver White wire, B3 = Transmitter Brown wire andReceiver Brown wire.

Terminal B4Is not internally connected. This terminal is used to connect the data from the receiver

head transmit signal (blue wire) and the data from the transmitter head receive signal(blue wire).

Terminal B5T4 light curtain Data link connection is not internally connected. This terminal is used toconnect the data from the receiver head receive signal (red wire) and the data from thetransmitter head transmit signal (red wire).

Terminals B6 and B7 – Safety inputs – Relay coil inputs to be connected to the devicewhich will energise the internal forcibly guided relays by applying 24V DC. B6 and B7may be used for a light curtain input (OSSD 1 and OSSD2), e.g. T4 series safety lightcurtain. B6 = Receiver Grey wire,B7 = Receiver Pink wire.


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Internal Connections - RY4B

Note: If using the T4 Series safety light curtain with the RY4Bthe status wire (Pink) needs to be terminated to a terminal blockif not being used.


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