ABB RET670 Installation And Commissioning Manual

5.6 Installing the serial communication cable for RS485
5.6.1
RS485 serial communication module
RS485
P
WB
Screw
te
rminal
X1
Backplate
Screw
te
rminal
X3
Angle
bracket
1
2
4
5
6
3
1
2
en07000140.vsd
IEC07000140 V1 EN
Figure 35: 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 ground
x3:2 soft ground
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
1MRK 504 088-UEN C Section 5
Installing the IED
65
Installation and commissioning manual

ABB RET670 Specifications

General

Rated Frequency	50/60 Hz
Inputs	Analog and binary inputs
Application	Protection of power systems
Communication Protocols	IEC 61850, DNP3, Modbus
Operating Temperature Range	-25°C to +55°C
Mounting	Rack mounted
Number of Binary Inputs	Up to 48
Number of Binary Outputs	32
Protection Functions	Overcurrent Protection
Outputs	Binary outputs
Enclosure	IP 54
Type	Line Differential Protection
Number of Analog Inputs	24