Precautions to take
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Type of conductors
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Use screened twisted pairs, with a minimum conductor cross-section of 0.28 mm2.
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Cable screening
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Connect the cable screening to the shortest TBX module ground on the TBX GND 015 grounding strip.
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Arrangement of the conductors in cables
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Multipair cables can be rearranged for signals of a similar type which have the same reference to ground.
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Cable routing
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Keep the measurement wires separate from the discrete I/O cables (in particular from relay outputs) and from power cables.
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Preactuator reference to ground
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Note: There are no technical restrictions in referencing the preactuators to ground. However, for safety reasons, it is advisable to avoid using a ground voltage which is some distance from the terminal, as this ground voltage may be very different from the nearby ground voltage. Distributed I/O modules minimize this risk as they are usually close to the process.
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Recommended voltage and current wiring: It is recommended to use preactuators with no reference to ground.
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channel 0 (voltage)
channel 1 (current)
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