Ampcontrol Pty Ltd – ABN 28 000 915 542
IPD USER MANUAL
IPDB014 Version 14 – SEP/2020
Uncontrolled Copy - Refer to Ampcontrol Website for Latest Version
APPROVED FOR EXTERNAL DISTRIBUTION
– PROPERTY OF AMPCONTROL PTY LTD
– NOT TO BE REPRODUCED IN PART
8 MACHINE COMMUNICATION
8.1 Remote Termination Unit (RTU-D)
The Remote Termination unit is a microprocessor based, fully encapsulated module that replaces the
diode at the end of the pilot conductor of the trailing cable. It is powered by and communicates via the
pilot line. Its non-volatile memory stores the parameters to configure the outlet as appropriate for that
machine.
All terminals are fully shrouded, with the pilot and earth terminals being kept segregated from the other
terminals. (See RTU-D General Case Dimensions, Drawing IPDA015 in Appendix A – Drawings)
The Remote Termination Unit (RTU-D) provides remote stop, start facilities of the IPD Relay’s controlled
outlet. The circuitry involved for these functions are self-diagnostic and will cause the outlet to turn off if
the circuits are earthed or interconnected. This reduces the chance of the outlet operating when not
required to do so due to wiring faults. It should be noted that these functions are operational only, and
that any emergency stops should be wired direct into the pilot circuit.
Emergency Stops should not be wired into the Stop input of the RTU-
D. They should be directly wired into the pilot circuit of the IPD.
PTC terminals are provided for a semiconductor thermistor connection. These terminals are protected in
a similar manner to the stop and start circuits.
If the remote stop, start and PTC functions are not required, each set of terminals must be bridged, or
the IPD Relay will not energise.
Four RTD inputs are provided for PT 100 temperature measuring devices. These terminals could also be
used with resistor networks to provide digital information back at the IPD Relay.
The RX, TX and 0V terminals are no longer required and should remain
unconnected.
On/Off Line Status, machine type, machine number, software version and input status of the Remote
Termination Unit can be examined by selecting “Machine Module Information” (Level 2, Positions 1-2).
RTD temperature is available, Level 2, Position 4.
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