PEP Modular Computers Modular Computers RS485 - RS232 Telephone Connector (BU1); RS485 D-Sub Connector for Half-Duplex Operation (Profibus)

SMART I/O User’s Manual
©1996 PEP Modular Computers GmbHMarch 12, 1996 Page 2 - 15
2
Chapter 2 SMART-BASE
2.5.5 RS232 Telephone Connector (BU1)
In order to meet the needs of widespread standards, the RS232 connector is
selected as a telephone connector, an 8-pin RJ12 telephone jack with full
MODEM support.
* optional, for full-duplex operation
2.5.6 RS485 D-Sub Connector (BU2) for Half-Duplex Operation (Profibus)
Pin Nr. Signal Description Pin Nr. Signal Description
1 SHIELD Shield Isolation 6 Aux. +5V Auxiliary +5V
2 N/C Not Connected 7 N/C Not Connected
3 T/RxD + Transmit / Receive Line 8 T/RxD - Transmit / Receive Line
4 CNTR +* Control Line 9 CNTR -* Control Line
5 Aux. GND Auxiliary Ground
1
5
6
9
12 8
Pin Nr. Signal Description
1 DSR Data Set Ready
2 RTS Ready to Send
3 System GND System GND
4 TxD Transmit Line
5 RxD Receive Line
6 DCD Data Carrier Detect
7 CTS Clear to Send
8 DTR Data Terminal Ready