Rs485 (X3-Ser1); Pin Assignment; Termination; Fig. 7-6: 25 Pin D-Sub Female Connector Strip - Bosch Rexroth IndraControl VCP 05 Project Planning Manual

7-6 Bosch Rexroth AG | Electric Drives and Controls
Interfaces
7.1.2

RS485 (X3-SER1)

7.1.2.1 Pin Assignment

7.1.2.2 Termination

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The interface is suitable for point-to-point and for multi-point connec-
tions.
The wires belonging together are marked with „A" and „B". Some
descriptions refer to the pins with „+" and „-" , where A = + and B = -.
Signal Logic 1 U
Signal Logic 0 U

Fig. 7-6: 25 pin D-SUB female connector strip

Connector in the small operator terminal: 25-pin D-SUB female con-
nector strip
Pin Designation Function
8 T(A) Transmitted data (+)
9 T(B) Transmitted data (-)
11 SGND Signal Ground
22 R(A) Received data (+)
23 R(B) Received data (-)

Fig. 7-7: Pin assignment RS485

The D-SUB connector strips must be shielded sufficiently. See chapter
"Shielding D-SUB Connectors" on page 7-22.
For point-to-point connections, always activate the termination. For
multi-point connections, only activate the termination at the cable end.
Rexroth IndraControl VCP 05 | R911299726 / 02
- U <= -0.3 V i.e. (U
A B A
- U >= +0.3 V i.e. (U
A B
< U )
B
> U )
A B