Rev D
Model MS-500x
CrossPoint Technologies, Inc
3
2.2
Rear Panel
Rear panels are customized to the different matrix configurations. Specific drawings found in the
Appendix for each model that identify the connector reference numbers (“J numbers”).
3
Installation
The Matrix Switch mounts in a standard EIA rack. Some units use internal fans provide cooling
from side to side. Standard rack mounting will allow adequate clearance for the air vents on the
sides. The unit does not require empty rack space above or below.
3.1
Connections
3.1.1
AC Power
The Matrix is provided with a standard detachable US AC line cord. However, the internal power
supplies have universal voltage capability (220/110 VAC). Plug the equipment into an AC source
of either 110 or 220 VAC.
3.1.2
Serial Port
The serial port is a dual purpose connector located on the rear of the Matrix. The connector is
labeled CTRL. It provides RS-232 format signals as well as RS-422 signals. The chassis
connector is a common 9 pin male D connector.
3.1.2.1
RS-232 Operation
RS-232 is recommended for cable lengths up to 50 feet between the computer and the matrix.
Longer links can be accommodated reliably, but may require experimenting with slower baud
rates, lower loss cable and better shielding.
The link can operate at four baud rates between 2400 and 19200 bits per second. The baud rate
is selected by the front panel menus. The other communication parameters are fixed at 8 bit
words, no parity and 1 stop bit. Set your remote computer interface to the same settings. Factory
default is 19200 baud.
The serial interface does not support hardware or software flow control. Commands and
responses are relatively short and flow control is not normally required. The command/response
method assures that the host computer can sense if the Matrix is unable to accept more
characters.
The RS-232 interface is pin compatible with standard PC serial ports, which use RS-574 pin
assignments. To control the system from a PC, a “null Modem” cable is required. A Null Modem
adapter can be used with a “straight through” cable, or a custom cable can be wired, following the
diagram below.
