ADR233B
Ref ID : ADR233B/IM/I&P
Rev No. : 05
Page No. : 52 of 479
Figure 15: Terminal blocks for Auxiliary Supply, Input/ Output for B0
These should be wired with 1 mm2 PVC insulated multi-stranded copper wire terminated with
M4 Ring Type lugs.
Rear Port connection
The rear port RS485 is intended to use with a permanently wired connection to a remote
SCADA system. The physical connectivity is achieved using this terminal for signal connection.
The terminal block is located at the rear side of the relay as shown below.
Figure 16: Rear Port terminal block
For connecting the RS485, use screened cable with a maximum total length of 1000 m or 200
nF total cable capacitance.
A typical cable specification would be:
Each core: 16/0.2 mm
2
copper conductors, PVC insulated
Nominal conductor area: 0.5 mm
2
per core
Screen: Overall braid, PVC sheathed
There is no electrical connection between cable screen and the device. The link is provided to
connect the two cable screens together.
2.3.9 Power Supply Connections
These connections should be wired with 2.5 mm2 PVC insulated multi-stranded copper wire
terminated with M4 ring terminals. The wire should have a minimum voltage rating of 300 V
RMS.
As per the application, if in case auxiliary input supply of the relay needs to be wired, then
adequate care should be taken to wire as per polarity marking on the Terminal sticker at the rear
side of the relay. The supply range is also mentioned on the Terminal sticker and before
energising, care should be taken to confirm that the auxiliary supply being wired is within range.
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