Serial Rs232/Rs485/Rs422 Rj45 Ports; Serial Insulated Terminals - Siemens RUGGEDCOM RS400 Installation Manual

Chapter 4
Communication Ports
a
No internal termination is provided.
b
The Common terminal is optically isolated. However, there is transient voltage protection circuitry between the Common terminal and chassis ground.
c
Pins 7 and 8 are connected together internally. In RS232 mode, these pins enter a high impedance state. A DTE that asserts RTS will see CTS asserted, although
the device will not perform hardware flow control.
Section 4.4.3

Serial RS232/RS485/RS422 RJ45 Ports

The RUGGEDCOM RS400 can be equipped with serial RS232/RS485/RS422 RJ45 ports. Each port can be set
individually through the ROS operating system to operate in RS232, RS485 or RS422 mode. For more information,
refer to the ROS User Guide for the RUGGEDCOM RS400.
The following is the pin-out description for the RS232/RS485/RS422 RJ45 ports:
8
Figure 19: RS232/RS485/RS422 RJ45 Serial Console Port
d
No internal termination is provided.
e
The DSR, DCD and DTR pins are connected together internally.
f
In RS232 mode, the RJ45 ports conform to EIA-561 DTE, which transmit on TXD and receive on RXD.
Section 4.4.4

Serial Insulated Terminals

The RUGGEDCOM RS400 can be equipped with serial RS485 insulated terminals. The terminals are terminated
by default from the factory. Termination provided is AC Termination style 120 Ohm resistor in series with a 10nF
capacitor. The following details the appropriate jumper configuration for each RS485 port.
22
Pin
Shield
Pin
1
Shield
a
RS232 Mode RS485 Mode
9 RI (No
Connection)
Chassis Ground
d
RS232 Mode RS485 Mode
e
1 DSR
e
2 DCD
e
3 DTR
4 Common (Isolated) Ground
f
5 RXD
f
6 TXD
7 CTS
8 RTS
Chassis Ground
Serial RS232/RS485/RS422 RJ45 Ports
RUGGEDCOM RS400
Installation Guide
Name
RS422 Mode
— —
Name
RS422 Mode
RX-
RX+
TX/RX+ TX+
TX/RX- TX-