User guide

Serial Ports
28
RuggedCom
®
RuggedServer™ RS416 Family Installation Guide rev118
3.5 RS232/RS485/RS422 plus IRIG-B via RJ45
Each port is individually selectable via software to be RS232, RS485 or RS422. IRIG-B
signal and ground are available on pins 2 and 3, respectively, for every mode. The RJ45
port and pin-out is shown below.
Figure 22: RJ45 port pin-out with IRIG-B
Pin RS232 Mode RS485 Mode RS422 Mode
1 - - RX-
2 +IRIG-B
3 Common (Isolated) Ground
4 Common (Isolated) Ground
5 RXD
3
- RX+
6 TXD
3
TX/RX + TX +
7 CTS
2
- -
8 RTS
2
TX/RX- TX-
Shield Chassis Ground
Table 9: RJ45 Port pin-out
NOTES:
1. No internal termination is provided.
2. Pins 7 and 8 are connected internally. In RS232 mode, these pins enter a high impedance state. A DTE
that asserts RTS will see CTS asserted, although the RuggedServer will not perform hardware flow
control.
3. In RS232 mode, the RJ45 ports conform mostly to EIA-561 DTE, which transmit on TXD and receive on
RXD.
The IRIG-B output on each port is configurable via software to provide IRIG-B pulse-
width modulated output (IRIG-B006 or IRIG-B007) or PPS output, a single pulse per
second on the second.