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3. Installation
3.8. Serial Ports: RJ45
The RX1512 supports serial port line modules with RJ45 connections. On power-up, all serial
ports default to RS485 mode. Each port can be individually set to RS232, RS485, or RS422 mode
via software.
Figure 3.15. RJ45 Serial Pin Configuration
Pin 2 is reserved for future IRIG-B output. Do not connect Pin 2 at this time; doing
so may cause hardware damage. Pins 7 and 8 are connected internally. No internal
termination is provided. In RS232 mode, these pins enter a high impedance state.
A DTE that asserts RTS will see CTS asserted, but hardware flow control is not
performed on the port.
3.9. DDS Ports: RJ45
The RX1512 supports DDS port line modules with RJ45 connections. The 56 kbps DDS port is
compatible with Bellcore standards. Each DDS module features a single 56/64 kbps DDS line
interface with a standard RJ45 receptacle.
Figure 3.16. RJ45 DDS Pin Configuration
RuggedCom® RuggedBackbone™
Pin
RS232 Mode
1
2
3
4
5
RX
6
TX
7
CTS
8
RTS
Shield
Table
3.5.
RJ45
Assignment
RJ45 Pin
1
R1: Transmit data to network (Ring 1)
2
T1: Transmit data to network (Tip 1)
3
4
5
6
7
T: Receive data from network (Tip)
8
R: Receive data from network (Ring)
Table 3.6. RJ45 DDS Pin Assignment
25
RX1512 Installation Guide Rev 105
RS485 Mode
RS422 Mode
RX-
Reserved
COM (Isolated GND)
COM (Isolated GND)
RX+
TX/RX +
TX +
TX/RX -
TX -
Chassis GND
RS232/RS485/RS422
Serial
Description
NC
NC
NC
NC
Pin
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