6.5
Installing the serial communication cable for RS485
6.5.1
RS485 serial communication module
RS485
PWB
Screw
terminal
X1
Backplate
Screw
terminal
X3
Angle
bracket
1
2
4
5
6
3
1
2
en07000140.vsd
IEC07000140 V1 EN
Figure 47:
The connection plate to the backplate with connectors and screws.
This figure also shows the pin numbering from the component side
Pin
Name 2-wire
Name 4-wire
Description
x3:1
soft earth
x3:2
soft earth
x1:1
RS485 +
TX+
Receive/transmit high
or transmit high
x1:2
RS485 –
TX-
Receive/transmit low or
transmit low
x1:3
Term
T-Term
Termination resistor for
transmitter (and
receiver in 2-wire case)
(connect to TX+)
x1:4
reserved
R-Term
Termination resistor for
receiver (connect to RX
+)
x1:5
reserved
RX-
Receive low
x1:6
reserved
RX+
Receive high
2–wire:
Connect pin X1:1 to pin
X1:6 and pin X1:2 to pin
X1:5.
Termination (2-wire):
Connect pin X1:1 to pin
X1:3
Termination (4-wire):
Connect pin X1:1 to pin
X1:3 and pin X1:4 to pin
X1:6
Section 6
1MRK514019-UEN A
Connecting
74
670 series 2.0 IEC
Installation manual
Summary of Contents for Relion 670 2.0 IEC Series
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