Pickering Interfaces are sponsor members of the PXI Systems Alliance www.pxisa.org

www.pickeringtest.com E-Mail sales@pickeringtest.com

PXI Switch & Instrumentation

Pickering Interfaces www.pickeringtest.com

40-310/320High Voltage Relay/Multiplexer

HigH Voltage Relay/MUX40-310/320

Model 40-310: 8 or 16 x High Voltage SPSt Reed Relays

Model 40-320: 12 or 24 Channel High Voltage Multiplexer

Switch up to 500Volts d.c. or 300Volts a.c. r.m.s., 10W max power

1000V d.c. or 600Volts a.c. r.m.s. isolation

Dry Reed Switch Contacts for long life

operating Speed <0.5ms

ViSa/iVi Drivers Supplied for Win 98/2000/Nt/XP

2 year Warranty

C 1

C 2

C 3

C 24

Common

40-320: 12 or 24 Channel High Voltage Multiplexer

A1

C1

A2

C2

A16

C16

40-310: 8 or 16 x SPSt High Voltage Reed Relays

The 40-310/320 Range of High Voltage Switching Modules will Switch up to 500Vd.c. with Isolation to 1000V. Two module types are available: Normally Open Reed Relays and Multiplexer.

40-310/320 high voltage switching modules are designed for both “hot” switching (close switch after load applied) and “cold” switching (close switch before EHT load applied) high voltage applications, giving reliable switching with no disruption to internal logic.

Applications for the 40-310/320 series modules include: circuit board isolation testing, relay testing, semiconductor breakdown monitoring and cable harness insulation testing.

40-320: High Voltage Multiplexer PCB layout

Shown with high voltage

cover removed

40-310 Shown Complete With

High Voltage Cover

Pickering Interfaces are sponsor members of the PXI Systems Alliance www.pxisa.org

www.pickeringtest.com E-Mail sales@pickeringtest.com

PXI Switch & Instrumentation

Pickering Interfaces www.pickeringtest.com

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High Voltage Switching Specification

Switch type: Rhodium Reed

Max Switching Voltage:Max Standoff Voltage:

500V/300Va.c. r.m.s.1000V/600Va.c. r.m.s.

Max Power:Max Switch Current:

Max Carry Current:

10W0.5A(20mA at max switch volts)0.5A

Path ResistanceOn (single module):Off (single module):

Differential Thermal Offset:Bandwidth:

<3Ω>1x1010Ω

<8µV250kHz

Operate Time:Release Time:

<0.5ms, 0.25ms typ.<0.5ms, 0.25ms typ.

Expected LifeLow power load:Full power load:

>1x108 operations>5x106 operations

“Hot” Switching is used to switch the load with the high voltage source applied. Hot Switching may generate considerable RFI, both within the switching module and on all interconnection wiring. Care must be taken to suppress or shield all cabling. Note that any precaution which adds extra capacitance to an incoming cable should be taken with great care, even a very small capacitance at high voltages can cause very large current inrushes to the switch resulting in possible switch weld and excessive RFI.High Voltage PXI Modules are fitted with suppression components to minimise high frequency switching noise, these suppressors reduce the high energy, high frequency

spikes present when “hot” switching high voltage signals.“Cold” Switching -–The Preferred Option for Reliability & Long Life . With cold switching the relay is operated before the high voltage source is connected, the maximum carry current is then much greater, there will also be much less stress on the reed switches resulting in improved reliability and life. There is also much less likelihood of generating RFI at switch time (provided the HT source has a soft start facility).High voltage switching modules are often used for isolation testing applications (e.g. cable, transformer or semiconductor isolation tests) here cold switching is nearly always the preferred option.

Overview of “Hot” & “Cold” Switching Techniques

Relay typeAll 40-3XX series high voltage switch cards are fitted with Pickering Series 104 Reed Relays (Rhodium type), these offer very long life with good low level switching performance and excellent contact resistance stability.Spare Reed Relays are built onto the circuit board to facilitate easy maintenance with minimum downtime.All reed relays are manufactured by our sister company Pickering Electronics, www.pickeringrelay.com.

RFi SuppressionAll High Voltage PXI modules have extensive built-in RFI suppression, this will greatly increase switching life and eliminate potential problems due to high voltage transients upsetting either your PXI system or external instrumentation and your PC.Please note, it is good practice to keep high voltage switching modules away from more sensitive switching units to minimise any crosstalk.The suppression components result in reduced bandwidth and slightly higher path resistance, please refer to ratings table.

ProgrammingAll PXI cards are supplied with complete Windows 98/2000/NT/XP drivers, these perform the following functions:-

• Write word/s to card (to set relay pattern)• Write bit to card (to operate an individual relay)• Full relay status reporting• Card identification and location information• Set and read card calibration information

Up to date driver software is available from our web site at www.pickeringtest.com

Power Requirements

+3.3V +5V +12V -12V

0 400mA (280mA typ) 0 0

Width and DimensionsSingle slot 3U PXI (CompactPCI card).

PXi & CompactPCi ComplianceAll Pickering Interfaces PXI cards comply with the PXI Specification 2.1. Local Bus, Interrupts, Trigger Bus and Star Trigger are not implemented.Supplied soft front panels and driver software are fully Windows 98/2000/NT/XP compatible.

Product order Codes

8 x SPST High Volts Reed Relays 40-310-00116 x SPST High Volts Reed Relays 40-310-10112 Channel High Volts Multiplexer 40-320-00124 Channel Versatile Multiplexer 40-320-101

Mating Connectors & Cabling

Please refer to the Pickering Interfaces “interconnection Solutions” catalog for a full list of connector/cabling options, including drawings, photos and specifications. This is available in either print or as a download.

Alternatively our web site has dynamically linked connector/cabling options including pricing for all Pickering PXI modules.

latest DetailsPlease refer to our Web Site for Latest Product Details.www.pickeringtest.com

Connectors

PXI bus via 32 bit P1/J1 backplane connector.Signals via front panel 37 Way male D-type, high voltage connector.