Construction; Base Unit Versions - ABB REF 542plus Technical Reference Manual

1MRS755859
5.
5.1.
Multifunction Protection and Switchbay Control
Unit
Technical Reference Manual

Construction

Base unit versions

The REF 542plus base unit housing is made from aluminum sheets. Its exterior is
chromatized both to protect the housing against corrosion and to improve immunity
against EMC disturbances. Two different housings are available:
Standard
*
Wide
*
In both versions, at least the following modules have to be present:
The power supply, the mainboard.
*
The analog input module
*
One binary input and output module
*
The standard housing can additionaly house:
Another binary input and output module
*
Alternatively the communication module or the 4/0 ... 20 mA analog output
*
module
Backplane differs from 4/0 ... 20 mA analog output module and communication
module. The backplane type has to be specified.
The wide housing can additionaly house:
Other 2 binary input and output modules
*
The communication module
*
Alternatively the 4/0 ... 20 mA analog output module or the 4 ... 20 mA analog
*
input module
The 4 ... 20 mA analog input module can be used with the wide
housing only.
Standard housing summary
One power supply
*
One mainboard module
*
One analog input module
*
At most two binary input and output modules
*
Optionally the communication module or the 4/0 ... 20 mA analog output one
*
REF 542plus REF 542plus
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