Comtrol RocketPort INFINITY - Manual (Page 17)

RocketPort INFINITY User Guide: 2000465 Rev. E Connecting Serial Devices - 17
Connecting Serial Devices
DB25M: Surge
Interface Box
Loopback Plugs RocketPort INFINITY models with DB25 male connectors on the Surge interface
box are shipped with a a single loopback plug (RS-232/422).
Wire the following pins together to build additional
RS-232/422 plugs or replace a missing RS-232/422
loopback plug.
• Pins 2 to 3 or alternately, Pins 17 to 25
• Pins 4 to 5 to 22 or alternately, Pins 15 to 19 to 22
• Pins 6 to 8 to 20
You can wire the following pins together for an RS-422 only loopback plug.
• Pins 2 to 3 or alternately, Pins 17 to 25
• Pins 4 to 5 or alternately, Pins 15 to 19
RJ45 Serial Cables and Loopback Plugs
This section describes RJ45 cables and loopback plugs for the Octacable and
Rackmount interface boxes.
• RJ45 Signals
• RJ45 Null-Modem Cable (RS-232) on Page 18
• RJ45 Null-Modem Cable (RS-422 or RS-485 Full-Duplex) on Page 18
• RJ45 Straight-Through Cable (RS-232 or RS-485 Half-Duplex) on Page 18
• RJ45 Loopback Plugs on Page 18
RJ45 Signals There are no standards for RJ45 connector pinouts. Refer to the
manufacturer’s installation documentation if you need help with
connector pinouts or cabling for the serial device.
Note: Ring indicator is not supported on the RJ45 connector.
Pin 13 Pin 1
RS-232/422 (Back View)
Pin 14 Pin 25
RJ45 Connector Signals
Pin RS-232 RS-422
RS-485
(Full-Duplex)
RS-485
(Half-Duplex)
1 RTS TxD+ TxD+ TRxD+
2 DTR Not Used Not Used Not Used
3 Gnd Not Used† Not Used† Not Used†
4 TxD TxD- TxD- TRxD-
5 RxD RxD- RxD- Not Used
6 DCD Not Used Not Used Not Used
7 DSR Not Used Not Used Not Used
8 CTS RxD+ RxD+ Not Used
† Pin 3 is tied to ground on the board, but is not used in the cable.