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4-3
MPX Plus 866 A Media Presentation Matrix Switcher • SIS Programming and Control
PRELIMINARY
Rear panel Remote ports
N
See “Selecting the RS-232 Primary port’s baud rate“, in chapter 3, “Operation”,
to configure the RS-232 Primary port from the front panel.
FunctionPin
TX
RX
Gnd
Transmit data
Receive data
Signal ground
RS-232
PRIMARY
RS-232
SECONDARY
Tx Rx
Tx Rx
Controlling
Device
Ground ( )
Receive (Rx)
Transmit (Tx)
Ground ( )
Receive (Rx)
Transmit (Tx)
Bidirectional
Do not tin the wires!
Figure 4-1 — RS-232 connector pin assignments
Front panel Configuration port
N
This port parallels the rear panel RS-232 Secondary port. If a front panel
configuration connection is made, the rear panel RS-232 Secondary port becomes
inactive and the front panel Configuration port is active. The two paralleled
ports’ protocol can be changed via SIS command control only. See the “Set serial
port parameters” command in “Command/response table for IP-specific SIS
commands” on page 4-20 to configure this port under SIS control.
The optional 9-pin D to 2.5 mm mini jack TRS RS-232 cable, part #70-335-01
(figure 4-2) can be used for connection to the Configuration port.
6 feet
(1.8 m)
Part #70-335-01
5
1
9
6
Sleeve (Gnd)
Ring
Tip
9-pin D Connection TRS Plug
Pin 2 Computer's RX line Tip
Pin 3 Computer's TX line Ring
Pin 5 Computer's signal ground Sleeve
Figure 4-2 — Optional 9-pin TRS RS-232 cable