Baer DLX - Pin Allocation of the RS485 (2 Wires); Pin Allocation of the RS485 (4 Wires)

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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: 0VDC / 5VDC
• Number of partner: max. 32
• Cable length: max 1.2km
• Baud rate: 300 to 9600 Baud (fix baud rate)
• Communication protocol: SCTM or IEC 60870-5-102
(alternatively Modbus RTU)
• Termination (120 Ω ): none
Pin allocation at housing for panel mounting (Com2/X5 or Com1/X6)
and at 19”-rack (only Com2/X7):
DLX (5 pins, male)
Function Pin No.
B (–)
1
A (+)
2
GND
3
A (+) Bridge to 2
4
B (–) Bridge to 1
5
Baud rate: 300 to 9600 Baud
Pin allocation at 19”-rack (only Com1/X6):
DLX (5 pins, male)
Function Pin No.
—
1
A (+)
2
B (–)
3
—
4
GND
5
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 Pin No.
D (A–)
1
T (B+)
2
T (A–)
3
D (B+)
4
GND
5
Baud rate: 300 to 9600 Baud
Note: Possible at 19”-rack only!