Technical Specifications 11-9
590 Series DC Digital Converter
Terminal Information (Power Board)
Terminal
Description
Terminal Function Signal Level Terminal
Number
Main contactor coil
Line
This terminal is the switched output from the contactor control
relay and is derived from the auxiliary supply at terminal D8.
The output is internally fused at 3A hence contactor coils having
a high pick-up current must be operated via a slave relay.
Note: The contacts of the Contactor Control Relay are
suppressed by a series connected resistor (680 Ohms) and
capacitor (22nF) to protect the relay contacts. Users should be
aware that when the contactor Control Relay is “De-energised”,
a leakage current of approximately 2mA can be expected and
this should be considered when interfacing to these terminals.
Typically, there could be the energisation of very sensitive relays.
110/240V
50-60Hz line-to-line
D5
Main contactor coil
Neutral
This terminal is internally connected to the auxiliary supply
neutral and provides a convenient connection point for the
contactor coil neutral connection.
110/240V
50-60Hz line-to-line
D6
Auxiliary supply Neutral 110/240V
50-60Hz line-to-line
D7
Auxiliary supply
Line
These terminals are the mains input connections for the switch
mode power supply, contactor control relay supply and cooling
fan supply (when force cooled - refer to Chapter 13: “Standard
and Optional Equipment”). The voltage applied to these
terminals is Product Code dependent
110/240V
50-60Hz line-to-line
D8
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