Cleveland Motion Controls Classic Series DIN Rail Amplifier with Isolated Output MWI-13467 REV CA - Manual (Page 15)

MAN-13467 R EV CA C LASSIC S ERIES A MPLIFIER W / I SOLATED O UTPUTS
Page 15 of 30
2.11.2 T RANSDUCER W IRING
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Figure 5 - Pair of Half-bridge Transducers Wiring
The successful amplification of low-level signals from strain gage transducers requires particular attention to wiring
practices to avoid signal degradation in the industrial environment. Degradation can result from AC noise pickup
and/or DC errors. Refer to the following guidelines to identify measures that may help retain signal quality:
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Use shielded transducer cables to reduce pickup of noise through electrostatic coupling.
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Route cables away from sources of electrical interference (motor wiring, contactors, etc).
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Connect the shield drain wire at one end only to discourage shield currents .
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Optimum high frequency grounding requires low inductance connections that are enhanced
with short conductors or planar ground conductors (wide ground braids).
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Do not pre-tin the stranded wires inserted into the pluggable connector.
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A stable connection relies on the springy nature of stranded conductors to ensure a low
contact resistance despite thermal cycling and airborne impurities.
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Avoid temperature extremes or gradients where electrical connections are made between
different metals. Connections can cause thermocouple voltages to be generated, which then
become superimposed on transducer signals.
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In severe cases, additional shielding may be required in the form of either external flexible
braided shields or running the field wiring wires inside metallic conduit
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2.12 T HE P OWER S UPPLY
For best performance a regulated power supply should be used with the Classic Series DIN Rail amplifier. It is
important that you pay particular attention to the power supply for susceptibility to the effects of conducted and
radiated energy from noise sources. Every effort should be made to provide stable voltage to the amplifier using
correct wiring practices and filters. To protect against circuit damage, include a 0.38 Amp fuse in the power supply
output lead to each amplifier in case of amplifier or power supply malfunction.