Chapter 3
Communication Ports
RUGGEDCOM RX1100P
Installation Guide
22
Precision Time Protocol (PTP) Ports
NOTE
On power-up, all serial RJ45 ports default to RS485 mode. Each port can be individually set to RS232,
RS485 or RS422 mode through ROX . For more information, refer to the ROX User Guide for the
RX1100P.
NOTE
For information about how to connect devices configured to run in RS485 mode, refer to
“Connecting Multiple RS485 Devices”
.
All serial ports feature an LED that indicates the current state of the port.
State
Description
Green
Link activity detected
Off
No link detected
For specifications on serial ports, refer to
Section 4.6, “Serial Port Specifications”
The following is the pin-out description for RJ45 serial ports:
1
8
Figure 25: Serial RJ45 Port Pin Configuration
Pin
RS232 Mode
RS485 Mode
RS422 Mode
1
a
DSR/RI
RX-
2
a
DCD
3
DTR
4
Common (Isolated) Ground
5
RX
RX+
6
TX
TX/RX+
TX+
7
CTS
ab
8
RTS
b
TX/RX-
TX-
Shield
Chassis Ground
a
Connected internally.
b
In RS232 mode, this pin enters a high impedance state. A DTE that asserts RTS will see CTS asserted, although the device will not perform hardware flow
control.
Section 3.8
Precision Time Protocol (PTP) Ports
The optional Precision Time Protocol (PTP) card for the RX1100P provides accurate time synchronization across
local and wide area networks. The PTP card is capable of using a variety of time synchronization methods
including Network Time Protocol (NTP), IRIG-B, and IEEE 1588, making it a flexible product for new and existing
installations.
