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
Page 60 of 96
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14
SYSTEM CONTROL
14.1 Inputs and Outputs
14.1.1 Digital Inputs
The IPD Relay has five digital inputs, which are all voltage free contact inputs. Shorting the two input
terminals together activates them. The inputs are:
MCI
– Main Contactor Position Feedback
Start
– Local Start Input
Stop
– Local Stop Input
Lock
– Lock input for setting changes and locked reset operations
Reset
– Reset input
The status of inputs can be displayed on the Remote Display Module (Level 6, Positions 2 and 3).
14.1.2 Output Relays
The IPD Relay has output relays to control the main contactor (MCR) and the circuit breaker (CBR).
Both relays are fail safe with respect to power supply loss and are controlled on the basis of protection
functions.
Relay 3 has a selective function (see Section 12.1, Fan Interlocking). RL4 applies 110V for the
Insulation Test (see Section 9.2.3, Automatic Insulation Test).
The status of the relays can be displayed on the Remote Display Module (Level 6, Position 1).
14.1.3 Open Collector Outputs
The IPD Relay has eight open collector outputs, which are driven through opto-couplers to provide
additional indication if required. These can be used to drive LED’s, or additional relays (with
appropriate drive circuitry). The eight outputs correspond to the LED’s on the display module, turning
on whenever the corresponding LED is flashing. T
he signals are available on the IPD Relay’s base pins
35-42, and the common is on pin 34.
Contact Ampcontrol if further information is required about these outputs.
