ABB REF 542plus Technical Reference Manual

The REF 542plus HMI connection is shown in Fig. 8.1.-4
*
The X10 connector connects REF 542plus to the auxiliary voltage for the power
supply.
*
Connector type: Weidmuller SLA2/90B3.2SNOR
*
The X20 connector connects REF 542plus to the base unit.
*
Connector type: D-SUB9 FCT F09P5G2-K216
+
_
-PI
X10
1
2
HMI MODULE
RS-485
X20
3
8
a
b
A051275
Fig. 8.1.-4 REF 542plus HMI connection
Analog input connections
The analog input connector changes when conventional instrument transformers,
sensors or mixed combinations have to be connected. When sensors are used, they
are connected with CPE type connectors.
X81 corresponds to sensor 1, and X88 connects sensor 8. They can be indifferently
current or voltage sensors. The choice is a software configuration inside the
REF 542plus unit.
62
REF 542plusREF 542plus
Multifunction Protection and Switchbay Control
Unit
Technical Reference Manual
1MRS755859

ABB REF 542plus Specifications

General

Brand	ABB
Model	REF 542plus
Category	Control Unit
Language	English