Special Designs with CPCI-CAN-ISO11898 Add-On
CPCI-405
Hardware-Manual • Doc.-No.: I.2306.21 / Rev. 3.5
Page 45 of 57
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5.4.2 SER1: Assignment of the RJ12 Socket P100
The serial interface SER1 of the adapter board can be configured as RS-232, RS-422 or RS-485
interface. The configuration via the solder bridges is described in the previous chapter (see page 43).
For notes on the connection of serial interfaces please refer to chapter ‘Serial Interfaces’ on page 41.
From the principle circuit diagrams represented in that chapter, you will be able to clearly determine
the signal direction (Rx<->Tx).
Pin Position:
Cut-out for
fastening lever
Pin Assignment:
Pin
Signal
RS3232
RS422
RS485
1
n.c.
n.c.
n.c.
2
TxD-S1
Data Output
Tx-
Tx/Rx-
3
RxD-S1
Data Input
Rx+
n.c.
4
RTS-S1
Handshake Output
Tx+
Tx/Rx+
5
CTS-S1
Handshake Input
Rx-
n.c.
6
GND
GND
GND
The data direction of the signals is given as viewed from EPPC-CAN-ISO adapter board.
The signal direction does not switch automatically for the RS-485 interface! The signal direction must
be set by software via RTS-control.
An example for the assignment of a connection cable RJ12 <-> DSUB9 for RS-232 operation is
described on page 26.