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Screw
terminal
X3
1
2
1
2
3
4
5
6
Screw
terminal
X1
Backplane
Angle
bracket
RS485
PWB
IEC06000517 V1 EN-US
Figure 321:
RS485 connector
•
2-wire: Connect pin 1 to pin 6 and pin 2 to pin 5
•
Termination (2-wire): Connect pin 1 to pin 3
•
Termination (4-wire): Connect pin 1 to pin 3 and pin 4 to pin 6
Soft ground connector pinouts
SEMOD158670-45 v1
A second 2-pole screw connector is used for the connection of IO-ground. It can be
used in two combinations like:
•
Unconnected: No ground of the IO-part · .
•
Soft grounded: The IO is connected to the GND with an RC net parallel with a
MOV
23.2.12.3
Technical data
SEMOD158678-1 v1
SEMOD158710-2 v2
Table 666:
Galvanic RS485 communication module
Quantity
Range or value
Communication speed
2400–19200 bauds
External connectors
RS-485 6-pole connector
Soft ground 2-pole connector
Section 23
1MRK 511 408-UUS A
IED hardware
846
Phasor measurement unit RES670 2.2 ANSI
Technical manual
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