the need to interface moni- toring systems quickly and correctly with previously in- stalled sensors is key. The system is fully software programmable and upgradable which ensures adaptability as inevitably application requirements change. It’s also easy to ex- pand, simply by adding ad- ditional G3 monitors. The system offers excel- lent channel density with up to 24 measurement channels housed in a compact 3U x 19” rack mounted format which can halve the space needed on existing installations. Multiple outputs are available on the back of the rack for up to three alarm levels and two analogue outputs per channel. Dual redundant Modbus communications to a module level provide a ro- bust communication system, while the in-built LCD display offers readings, sensor integrity voltages, trend- ing and FFT, all important features which confirm the accuracy of the installation. The system is compliant to API 670 and therefore meets the most stringent protection re- quirements as well as meeting IEC 61508 up to SIL-3 standards.
2021 /// DAQ, Sensors & Instrumentation \\\ 23
PXI multiplexer module
Integrated monitored PXI multiplexer module from Pickering Interfaces indicates status of any active channel
A new range of PXI multiplexer modules (model 40-619) form Pickering Inter- faces is providing test engineers with the ability to monitor the open status of any channel. The 40-619 performs the same as a typical single-pole, 2A 60W multiplexer but uses secondary relays to determine the multiplexer channel status. Every multiplexer channel is provided with an additional monitor switch that allows the user, via an external measurement device, to verify that multiplexer channels are ‘open’ before applying test signals. This feature is essential in applications where the incorrect or unintended application of signals may dam- age the device-under-test. The 40-619 is available in nine switching configurations from 16:1 to 128:1, providing flex- ibility in test system design. It uses high-quality electro- mechanical (EMR) signal relays suitable for switching loads up to 2A at 250VAC/DC. The compact, single-slot foot-
print permits the implementation of a monitoring function while min- imising chassis slot space. According to Pickering’s switching product manager, Steve Edwards, the device provides a high-density, low-cost inte- grated monitoring system, removing the need for complicated external
wiring and additional test code, which is necessary if a similar topology were to be implemented using discrete switching. “The module is designed for signal routing in automated test equipment (ATE) and data ac- quisition systems, targeting applications where confir- mation of the channel status is required prior to test signal application,” he says.
Monitored
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