Pin Allocation Of The Rs485 (2 Wires); Pin Allocation Of The Rs485 (4 Wires) - Baer DLX User Manual

8.3.7

Pin allocation of the RS485 (2 wires)

With a RS485 interface module the unit can be used in a bus system, as
described in the standard ANSI/TIA/EIA-485-A-98.
•
Voltage:
•
Number of partner:
•
Cable length:
•
Baud rate:
•
Communication protocol:
•
Termination (120 ):
Pin allocation at housing for panel mounting (Com2/X5 or Com1/X6)
and at 19"-rack (only Com2/X7):
DLX (5 pins, male)
Function
B (–)
A (+)
GND
A (+) Bridge to 2
B (–) Bridge to 1
Baud rate: 300 to 9600 Baud
Pin allocation at 19"-rack (only Com1/X6):
DLX (5 pins, male)
Function
—
A (+)
B (–)
—
GND
Baud rate: 300 to 9600 Baud
8.3.8

Pin allocation of the RS485 (4 wires)

With a RS485 interface module the unit can be used in a bus system, as
described in the standard ANSI/TIA/EIA-485-A-98.
Pin allocation at 19"-rack (only Com1/X6):
DLX (5 pins, male)
Function
D (A–)
T (B+)
T (A–)
D (B+)
GND
Baud rate: 300 to 9600 Baud
Note: Possible at 19"-rack only!
0VDC / 5VDC
max. 32
max 1.2km
300 to 9600 Baud (fix baud rate)
SCTM or IEC 60870-5-102
(alternatively Modbus RTU)
none
Pin No.
1
2
3
4
5
Pin No.
1
2
3
4
5
Pin No.
1
2
3
4
5
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