RuggedCom RX1501 manual Serial Ports RJ45, DDS Ports RJ45, Pin RS232 Mode RS485 Mode RS422 Mode

3. Installation

3.8. Serial Ports: RJ45

The RX1501 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.

	Pin	RS232 Mode	RS485 Mode	RS422 Mode
	1			RX-
	2		Reserved
	3	COM (Isolated GND)
	4	COM (Isolated GND)
	5	RX		RX+
	6	TX	TX/RX +	TX +
	7	CTS
	8	RTS	TX/RX -	TX -
Figure 3.20. RJ45 Serial Pin Configuration	Shield		Chassis GND

Table 3.5. RJ45 RS232/RS485/RS422 Serial Pin

Assignment

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 RX1501 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.

RJ45 Pin	Description
1	R1: Transmit data to network (Ring 1)
2	T1: Transmit data to network (Tip 1)
3	NC
4	NC
5	NC
6	NC
7	T: Receive data from network (Tip)
8	R: Receive data from network (Ring)

Figure 3.21. RJ45 DDS Pin Configuration

Table 3.6. RJ45 DDS Pin Assignment

RuggedCom® RuggedBackbone™ 28 RX1501 Installation Guide Rev 104