Tel: 248-295-0880 e-mail: sales@acromag.com www.acromag.com

9 0 0 M B S e r i e sM

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®

917/918MBMulti-ChannelAnalog OutputModules

DC Current or DC Voltage Outputs

Discrete Outputs

Models917MB: 4 current output channels918MB: 4 voltage output channels

Analog Output917MB: 0 to 20mA, 4 to 20mA, 0 to 1mA DC918MB: 0 to 10V, 0 to 5V, 0 to 1V DC

Discrete OutputFour output channels:Open-drain MOSFETs (1A DC loads)0 to 35V DC

Network CommunicationModbus-RTU high-speed RS-485

Power Requirement12 to 36V DC (917MB), 10 to 36V DC (918MB),24V AC

ApprovalsCE marked. UL, cUL listed Class I; Division 2; Groups A, B, C, D.

n DescriptionThese modules drive four analog output channelsand also feature four discrete outputs for on/offcontrol. Isolation separates the output, power,and network circuits. Network communicationadheres to the industry-standard RS-485 ModbusRTU protocol. AC and DC power sources aresupported with nonpolarized, diode-coupled terminals.

The analog outputs generate a signal based oncommunication from the host. They accommo-date wide DC voltage or current ranges.

Discrete outputs provide simple on/off switchingcapability (open-drain) for external devices.

Combining analog outputs, on/off controllers,and a network interface in a single package,makes this instrument extremely powerful. Multi-channel design adds cost-efficiency andallows high-density mounting. Plus, safe, ruggedconstruction make it reliable for both controlroom and distributed field I/O use in a broadrange of temperature control applications.Custom module configurations are also possible(consult factory for details).

n Special Featuresn Standard Modbus RTU protocol with high-speed

RS-485 communication (up to 115K bps)

n 12-bit D/A yields 0.1% of span resolution andaccuracy

n Four analog outputs in an inch-wide modulereduces system costs and saves panel space

n Four discrete outputs enable host-controlledon/off switching

n Heavy-duty 1A solid-state relays providedependable on/off control of industrial devices

n Self-calibration lowers maintenance costs byreducing periodic manual calibration checks

n Watchdog timers provide a configurablefailsafe output state for use when hostI/O communication is lost

n Three-way isolation eliminates potentialground loops between power, output, andnetwork circuitry

n Self-diagnostics monitor microcontroller activityto detect operational failures (lock-up) andexecute a reset to restore communication

Modbus

Four�Analog�Outputs�

�DC Current�

or�DC Voltage

RS-485

10-36V DC�or 24V AC

Isolation

Four�Discrete�Outputs

Power

Outputs (4)Outputs (2)

Outputs (2)

Analog Output ModuleModbus/RS-485

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n Performance

n General Analog OutputResolutionSee current/voltage output specifications for moreinformation.

Ambient Temperature EffectBetter than ±0.001% of output span per °C, or±1.0uV/°C, whichever is greater.

Ambient TemperatureOperation (917MB): -25°C to 60°C* (-13°F to 140°F*).Operation (918MB): -25°C to 70°C (-13°F to 158°F).Storage: -40°C to +85°C (-40°F to +185°F).* Limit 917MB maximum ambient to 50°C (122°F)when using supply voltages less than 15V DC.

n Current Output (917MB)DC Current Output RangesRange user-configured. Range selected applies to allchannels. Output Range Resolution Accuracy (% span)0 to 1mA 0.554% ±2.0% (±0.002mA)0 to 20mA 0.028% ±0.1% (±0.02mA)4 to 20mA 0.035% ±0.1% (±0.02mA)

Maximum Output Current22.5mA DC typical.

Integral Non-Linearity±0.1% of span or ±2 LSB typical, whichever is larger,for spans equal to or greater than 16mA.

Output Compliance12V minimum, 12.7V typical.

Output Load Resistance Range0 to 630 ohms typical.

Response Time11ms typical into 500 ohms, for measurement toreach 98% of the final value in response to a stepcommand. Actual response time will vary with load.

n Voltage Output (918MB)DC Voltage Output RangesRange user-configured. Selection applies to all channels.Output Range Resolution Accuracy (% span)0 to 1V 0.274% ±0.6% (±6mV)0 to 5V 0.055% ±0.1% (±5mV)0 to 10V 0.027% ±0.1% (±10mV)

Maximum Output Voltage11.255V DC typical.

Integral Non-Linearity±0.1% of span or ±2 LSB typical, whichever is larger,for spans equal to or greater than 5V.

Output Current0 to 10mA DC maximum.

Output Impedance1 ohm.

Output Short Circuit ProtectionIncluded.

Response Time110µs rise time typical, 150µs fall time typical,unloaded, for output to reach 98% of the final valuein response to a step command. Time varies with load.

n Discrete OutputOutput TypeFour independent open drain MOSFET switches with acommon return that operate as low-side switches.

Output Voltage Range0 to 35V DC (up to 1A/channel continuous).External voltage source required.

Output ON Resistance0.15 ohms maximum.

OperationDigital outputs are set to their OFF state following asoftware or power-on reset. Outputs may be set touser-defined states following a watchdog timeout.Watchdog timeout output control takes precedenceover limit alarm control. Alarm control takes prece-dence over host control.

Output Response Time4.1ms typical, from receipt of command to gate transition of the output MOSFET.

n CommunicationSupported Modbus CommandsThe command/response protocol for communicatingwith this module adheres to the Modbus/RTU standardfor the following Modbus Functions.

Read Coil (Output) Status Report Slave IDRead Holding Registers Reset SlaveRead Input RegistersForce Single Coil (Output)Preset Single Register Force Multiple Coils (Output)Preset Multiple Registers

LED IndicatorsLEDs indicate power, status, and discrete level/alarm.

n Power and IsolationPower Requirements10 to 36V DC (918MB), 12 to 36V DC (917MB)22 to 26V AC.

Supply CurrentSupply Current Draw (917) Current Draw (918)10V DC Not Recommended 100mA maximum12V DC 275mA maximum 85mA maximum24V DC 120mA maximum 45mA maximum24V AC 210mA rms max. 85mA rms max.

Isolation1500V AC for 60 seconds or 250V AC continuous. 3-way isolation between outputs, network, and powercircuits.

n OrderingInformation

Models917MB-0900918MB-0900DC current (917MB) or voltage (918MB) output module

Accessories900C-SIPConfiguration Software Interface Package(includes software CD-ROM for Windows, RS-232/485converter, and RS-485/three-wire cable)4001-095USB-to-RS232 adapterTBK-B02Optional terminal block kit, barrier strip style, 4 pcs.TBK-S02Optional terminal block kit, spring clamp style, 4 pcs.PS5R-VB24Power supply (24V DC, 2.1A)

DC CURRENT OUTPUT

ANALOG OUTPUT CONNECTIONS D

IGIT

AL

OU

TP

UT

S

45

46

TB4

OUT3

RTN

DIGITAL OUTPUT

TB

4

RTN

OUT2

OUT1

44

43

42

36

41

TB3

OUT0

D

COM

COM

D

RS

48

5

33

34

35

31

32

A

B

PW

R

TB

3

TB

1

ANALOG�OUTPUT

ANALOG�OUTPUT

TB

2

AC/DC�POWER

NETWORK�COMMUNICATION

DC VOLTAGE OUTPUT

TB1

I0+

RTN

12

11

AN

AL

OG

OU

TP

UT

S

13 RTN

I1+

RTN

14

15

AN

AL

OG

OU

TP

UT

S

16 RTN

TB2

21

22

I2+

RTN

I3+

RTN

23

24

RTN

26

25 RTN

TB1

V0+

RTN

12

11

AN

AL

OG

OU

TP

UT

S

13 RTN

V1+

RTN

14

15

AN

AL

OG

OU

TP

UT

S

16 RTN

TB2

21

22

V2+

RTN

V3+

RTN

23

24

RTN

26

25 RTN

TB1/TB2

+LR

I

TB1/TB2

+LR

WIRING CONNECTIONS SAME AS 913/914MB

10 TO 36V DC�OR 24V AC�NON-POLARIZED

I+

RTN

V+

RTN

8400100.qxp 3/20/2006 3:18 PM Page 61

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Tel: 248-295-0880 e-mail: sales@acromag.com www.acromag.com

9 0 0 M B S e r i e sM

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262524

TB2TB1

(110.5)4.35

(99.1)3.90

232221

TB

2

161512 13 1411

TB

1

D AB

PWR

TB3

33 313236 3435

TB4

414243444546

D

CO

MC

OM

RS485

TB

3

TB

4

DFT

32

10

ST

(118

.9)

4.68

(95.

3)3.

75

AcromagRUN

CL

(26.7)1.05

(59.

4)2.

34

NOTE: ALL DIMENSION ARE IN INCHES (MILLIMETERS)

"T" Rail Din Mounting Din EN 50022, 35mm

900MB Series Technical Diagrams

PERSONAL COMPUTERW/ WINDOWS 95/98 OR NT

RS-232 SERIALPORT CONNECTORAT BACK OF PC

RS-232 TO RS-485 CONVERTERMODEL 5034-214

900C-SIP COMMUNICATION CONNECTIONS

CONNECT THE RS-232SIDE OF CONVERTERTO THE PC

424345 44

TB

4

46

0 1

DFT

TB4

STSTATUS LED (YELLOW)RUN/PWR LED (GREEN)

DEFAULT MODE SWITCH -PUSH FOR DEFAULT MODE.

STATUS LED FLASHES INDEFAULT MODE.

RUNAcromag

INSTALL MODBUSCONFIGURATIONSOFTWARE

CAUTION: DO NOT CONNECT THECABLE DIRECTLY TO THE PC WITHOUTTHE CONVERTER, OR DAMAGE TOTHE MODULE MAY RESULT.

CABLE 5034-202

COM

D

D

CONNECT THE RS-485SIDE OF CONVERTERTO THE CABLE

CONNECT WIRES AS SHOWN

RS-485

GREENC

BLACK

RED

B

A

COLORWIRE

B AC

TB3

D

32

B

PWR

31

A

TB4

COM D

CO

M

CO

M

36 35

DD

34 33

RS485

41

TB

3

16 2221

TB

2

23 24 2625

TB2TB1

REFER TO THE USER'S MANUALTHAT CAME WITH YOUR MODULETO COMPLETE THE MODULE'SPOWER AND I/O CONNECTIONS

32

R

TB1

12 1311

ANY 900MB MODULE

TB

1

14 15

PC RUNNING�ACROMAG�

MODBUS CONFIG�SOFTWARE

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M o d b u s I / OM

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■ Performance

■ Discrete Inputs(901 & 903 models only)Input Type12 active-low, buffered inputs, with a common con-nection. Inputs include transient suppression devicesand series connected 100K ohm resistors, plus diodeover-voltage clamps to the internal +5V supply.

Input Signal Voltage Range0 to 35V DC, maximum.

Input Current293µA, typical at 35V DC.

Input Signal ThresholdTTL compatible with 100mV of hysteresis, typical.Low-to-High threshold is 1.7VDC, High-to-Low is1.6VDC, typical. Limited to TTL levels of 0.8VDC(max. LOW level) and 2.0VDC (min. HIGH level).

Input Resistance100K ohms, typical.

Input Hysteresis100mV DC, typical.

■ Discrete Outputs(902 & 903 models only)Output Type12 independent, open-drain, DMOS MOSFET switcheswith a common source connection that operate aslow-side switches.

Output Voltage Range0 to 35V DC max. (0 to 500mA/channel continuous).External voltage source required.

Output ON Resistance0.28 ohms maximum.

Output Response TimeForce Single Coil: Output updates within 250µs ofreceipt of a command.Force Multiple Coils: First coil updates in 250µs, followed successively by additional coils every 180µs.

■ GeneralI/O Pull-ups and Socket5.6K ohm pull-up resistor SIPs are installed in socketsat each port (four-channels per port).

Excitation (per port)External excitation voltage for each four-channel portis limited to 35V or less.

Supported Modbus CommandsThe command/response protocol for communicatingwith this module adheres to the Modbus/RTU standardfor the following Modbus Functions.

Read Coil (Output) StatusRead Input Status Read Holding RegistersForce Single Coil (Output)Preset Single RegisterReset SlaveForce Multiple Coils (Outputs)Preset Multiple RegistersReport Slave ID

LED IndicatorsLEDs indicate power, status, and discrete level.

Power Requirements10 to 36V DC, 22 to 26V AC.

Supply CurrentSupply Current Draw10V DC 130mA maximum24V DC 54mA maximum24V AC 95mA maximum

Isolation1500V AC for 60 seconds or 250V AC continuous. 3-way isolation between I/O, network, and powercircuits.

■ OrderingInformation

Models901MB-0900Discrete input module902MB-0900Discrete output module903MB-0900Discrete input/output module

Accessories900C-SIPConfiguration Software Interface Package(includes software CD-ROM for Windows, RS-232/485 converter, and RS-485/three-wire cable)4001-095USB-to-RS232 adapterTBK-B02Optional terminal block kit, barrier strip style, 4 pcs.TBK-S02Optional terminal block kit, spring clamp style, 4 pcs.PS5R-VB24Power supply (24V DC, 2.1A)

DIGITAL INPUT CONNECTIONS (ACTIVE LOW) DIGITAL OUTPUT CONNECTIONS

RTN

+5V

INP

INP

RTN

CH 0

RTN

CH 1

CH 2

CH 3

5V TTL LOGIC - INPUT CAN BE PULLEDUP INTERNALLY OR EXTERNALLY

DIGITAL I/OSHARESRETURN

EXC1TB1

INTERNAL INPUTPULL-UPS ARE PRESENT

DIG

ITAL

INo

rO

UT

CH11

RTN

46

45

44CH10

RS

48

5

41

42

43

EXC3

TB4

CH 8

CH 9

35

36

COM

COM

TB1

DIG

ITAL

INo

rO

UT

12

11

CH 0

EXC1

CH 1

13

14

15

CH 2

CH 3

RTN

16

DIG

ITAL

INo

rO

UT

TB2

21 EXC2

CH 4

22

24

23

CH 6

CH 5

RTN

CH 7

25

26

34

33D

D

31

32

TB3

PW

R

DIGITALI/O

10 TO 36V DCOR 24V ACNON-POLARIZED

DIGITALI/O

DIGITALI/O AC/DC

POWER

NETWORKCOMMUNICATION

903MB shown.901MB & 902MB

are similar.

A

B

TB

3

TB

2

TB

4

TB

1

CH 0

RTN

CH 1

CH 2

CH 3

EXC1TB1

OUT

RTN

DIGITAL I/OSHARESRETURN

EXC

INP

SPSTRELAY

12-24V DC,TYPICAL

+

RTN

EXC

RTN

INP

5-35V

V

RTN

I/O

902MB/903MBON

TO OTHER 3CHAN OF PORT100K

OFF

EXC903MB

+5V

LOAD

Optional terminal blocks: barrier strip (left) and spring clamp (right). Cage clamp terminal is standard.

8401-003

Tel: 248-295-0880 ■ sales@acromag.com ■ www.acromag.com ■ 30765 S Wixom Rd, Wixom, MI 48393 USA

PERSONAL COMPUTERRUNNING WINDOWS

98/ME/2000/XP

6 FEET OF CABLE

USB MALE

DB9P

RS232

4001095USB SERIAL CONVERTER

LED

TO HOST USB PORTHOSTUSB

CONFIGURATIONSOFTWARE

ACROMAGHOST PC RUNNING

Bulletin #8400-572B

DescriptionThis device is a USB-to-serial adapter that you can use to communicate with many Acromag I/O products for setup and re-configuration for your application.

Key Features & Benefits■ Connects to I/O modules via USB

(other adapters may be necessary)

■ Complete RS232 control signals

■ Conforms to USB Specification, Version 1.1

■ USB-powered

■ Cable length, 6 ft., UL approved

Performance SpecificationsUSB SpecificationVersion 1.1Data rateUp to 115.2KbpsEnvironmental StandardsRoHS-compliantBasic Power Consumption150mAPC RequirementsWindows® 7 and newer.

Ordering InformationNOTE: For more information visit www.acromag.com.

Adapters4001-095USB to serial adapter. Includes driver CD and manual.5030-913Serial port adapter. DB9S connector to RJ11 jack.5034-202RS-485 to 3-wire cable converter and cable, DB-9M to 3 x 12AWG RS-485 cable, 8 ft. 5032-787RS-232 to 151T transmitter configuration device converter and cable, 6 ft. 5034-214Non-isolated RS-232 to RS-485 Serial Port Converter, DB-9F to DB-9F.

Cables5030-902Cable. 6 feet long with RJ11 plug at each end.

Simplifies configuration of Acromag I/O Modules ◆ Enables configuration via USB port

Model 4001-095 USB-to-Serial Adapter

Accessories

All trademarks are property of their respective owners. Copyright © Acromag, Inc. 2019. Data subject to change without notice. Printed in USA 5/2019.

9-PIN CONNECTOR (DB9S)

RJ11 PLUG(6 CONDUCTOR)

(6 CONDUCTOR)RJ11 JACK

INTELLIPACK

MODEL 5030-913

SERIAL ADAPTER

MODEL 5030-902(6 feet long)

BC

D D

RS

-232

COM

A

RS

-485

5034-202

CABLE 5034-202

RS232 TO RS485 SERIALCONVERTER(MODEL 5034-214)

DB9 MALEDB9 FEMALE DB9 FEMALE

IntelliPack 800x Series Adapter and Cable

900MB Modbus Series Adapter and Cable