Rs 485 Cabling - Serial Port 1; Rs 485 Cabling - Serial Port 2; Fig. 8-10: Inserting A Terminator And Inverting The Open-Circuit Potential; Fig. 8-11: Rs 485 Cabling For Serial Port 1 - Addi-Data ADDICOM PA 7400 Series Technical Description

PA 7400
•
Invert the open-circuit potential of the receive lines RxA+(RxB+) and RxA-
(RxB-).
Set the jumpers as follows:

Fig. 8-10: Inserting a terminator and inverting the open-circuit potential

RS 485 cabling - serial port 1

•
If the communication software supports the control of the modem control signals,
è connect the modem control signals as follows to the connector.

RS 485 cabling - serial port 2

40

Fig. 8-11: RS 485 cabling for serial port 1

RTSA → CTSA
DTRA → DSRA → DCDA → RIA
The modem control signals are connected on the board as follows:
RTSB → CTSB
DTRB → DSRB → DCDB → RIB
Technical description
J19(14) in pos. A
J20(15) in pos. B
Chapter 8