ALTINEX MX2456RM User Manual

6.  If necessary, select the SYNC DELAY  UP or

DOWN button. To activate and set the SYNC
DELAY mode to memory, press and hold the UP
or DOWN button. LED’s that represent the
selected time should light.

7.  To activate the AUTO SWITCH mode, press the

AUTO SWITCH button. The LED that represents
the AUTO SWITCH mode should light. If the
AUTO ROTATE mode was selected previously,
it will cancel. Audio inputs will follow video inputs
if the AUDIO BREAK AWAY mode was not
selected previously.

8.  The AUDIO VOLUME mode will control the

audio stereo volume when the VOLUME UP or
DOWN button is pressed and released. The
AUDIO VOLUME UP or DOWN button is
between a maximum volume of +6dB and a
minimum volume of –6dB. From the minimum to
maximum volume, there are fifteen points. Each
point represents 0.8dB. After selecting the
volume, press and hold the UP and DOWN
buttons simultaneously.

9.  To turn OFF the beeping sound, press and hold

the BEEP ON/OFF button. The LED that
represents this button should light. To activate
sound, press and hold the BEEP ON/OFF button
again.

10. To return the switcher to factory preset, press

the RESET button. After a brief delay, all LED’s
should blink ON and OFF. A beeping sound will
be heard several times indicating that the
switcher has been reset.

The  MX2456RM Switcher offers remote control
capabilities through RS-232; the primary
communication standard used by control systems
and computers.

In fact, the  MX2456RM offers more features using
RS-232 than are currently available from the front
panel of the unit.

The  MX2456RM offers a terminal block using
solder-free, screw-down contacts, making it
extremely easy to connect the switcher to a control
system or a computer in the field.

                     Figure 1. RS-232 Terminal Block

1

+5V (not needed for
RS-232 connection)

2

GND (Ground)

3

RCV (Receive)

4

XMT (Transmit)

    

Table 4. PIN Designations

The terminal block is labeled with the appropriate
contact designations: Transmit (XMT), Receive
(RCV), and Ground (GND). Always remember that
the Transmit pin from the control system or
computer must be connected to the Receive pin on
the switcher control port; do not connect Transmit
to Transmit or Receive to Receive.

Note: the contact labeled +5V is not used for
RS-232 connections. This contact is used to
provide DC voltage to other equipment installed
within close proximity of the MX2456RM.

Typically, a control system or computer will offer
RS-232 connections on a 9-pin D connector.

The following are typical cable pin-out designations
for RS-232 connections on a 9-pin D connector.
Always verify that the pin-outs for your system are
correct to ensure the proper wiring.

IBM PIN No.

Contact

3

RX

2

TX

7

GND

Connection of IBM-PC 25-pin D to the MX2456RM
Terminal Block