Extron Electronics MPX 423 A - Manual (Page 18)

Installation, cont’d
MPX 423 A • Installation 2-6
PRELIMINAR
Y
RS-232 and Ethernet Control
For RS-232 control , use a control cable with only pins 2, 3, and 5 connected.
Otherwise, either cut the wires to the other pins in hard-shelled connectors or
remove the unneeded pins from molded plugs. See chapter 4, “SIS Programming
and Control”, for definitions of the SIS commands and details on how to install and
use the control software.
N The cable used to connect the RS-232 port to a computer or control system may
need to be modified by removing pins or cutting wires. If unneeded pins are
connected, communication may not be possible.
The RS-232 connector is a 9-pin D female with the following pin designations:
Pin RS-232 Description
1 — not used
2 Tx Transmit data
3 Rx Receive data
4 — not used
5 Gnd Signal ground
6 — not used
7 — not used
8 — not used
9 — not used
The protocol is 9600 baud, 8-bit, 1 stop bit, no parity, and no flow control. The
MPX 423 A is also compatible with baud rates 19200, 38400, and 115200.
For Ethernet control , connect a CAT 5, straight-through Ethernet cable to the RJ-45
LAN port of the switcher. See below for pinout instructions.
12345678
RJ-45 Connector
Insert
Twisted
Pair Wires
Pins:
Side View
Straight-through Cable
(for connection to a switch, hub, or router)
End 1 End 2
Pin Wire Color Pin Wire Color
1 white-orange 1 white-orange
2 orange 2 orange
3 white-green 3 white-green
4 blue 4 blue
5 white-blue 5 white-blue
6 green 6 green
7 white-brown 7 white-brown
8 brown 8 brown
For more detailed information, see the “Remote Control Port (RS-232)” section in
chapter 4.
DB9 Pin Locations
Female
5 1
9 6