Binary Inputs And Outputs; Static - ABB REF 542plus Operator's Manual

REF 542plus REF 542plus
19.2.
19.2.1.
78
Multifunction Protection and Switchgear Control Unit
Operator's manual
Fig. 19.1.-3 Connector for mixed analog input module
The picture above shows the connector for the mixed analog input module when
both sensors and conventional instrument transformers are used. To find out which
connector is used for what, identify the module code from the identification label
stick on the unit and see Table 19.1.-1.

Binary inputs and outputs

Binary input and output modules use the following connectors:
X20 (inputs), X21 (outputs) for the first module.
X30 (inputs), X31 (outputs) for the second module.
X40 (inputs), X41 (outputs) for the third module, available with the wide housing
only.
REF 542plus can be equipped with two different types of binary inputs and outputs
modules: static or with electromechanical relays.

Static

In the static module, digital inputs are implemented with optocouplers and digital
outputs are implemented with power transistors. Two different module types are
available, with control coil continuity and without.
Each module features: 14 digital inputs, 3 power outputs, 4 normal outputs, 2 signal
outputs, 1 watchdog output and optionally 2 coil supervision circuits. For more
information, refer to the REF 542plus Technical Reference Manual.
1MRS755869
A051453