Ashida ADR241B, Instruction Manual

Page: 43 / 272

ADR241B
Doc ID : ADR241B-DO_IM_01
Ref ID : ADR241B/IM/I&P
Rev No. : 06
Page No. : 43 of 272
Auxiliary power/ Input/ Output Connections
The terminal block of ADR241B used for Auxiliary supply, Status input, relay output contacts
& Rear communication port is as shown below. The wires should be terminated with straight
pin type lugs, with no more one lug per terminal.
The terminal blocks used for ADR241B relay is as shown below.
Figure 7 : Terminal blocks for Auxiliary/ Input/ Output
Caution: Always fit an insulating sleeve over the pin type lug.
Rear Serial Port connection
The rear serial port is intended for 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 of the relay as shown below.
Figure 8 : Rear Serial 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 of the cable screen to the device. The link is provided
purely to link together the two cable screens.