Installation: Labeling, Cabling, Mounting, cont’d
MLC 226 Series • Installation: Labeling, Cabling, Mounting2-4
PRELIMINARY
The front panel 2.5 mm mini stereo connector Config port serves the same
RS-232 function as this rear panel port but is independent from it.
Both configuration ports require 38400 baud communication. This is a higher
speed than many other Extron products use. The configuration software
automatically sets the connection for the appropriate speed. If using
HyperTerminal or a similar application, make sure the PC or control system
connected to these ports is set for 38400 baud.
Digital input: pin 1 and the ground pin together act as a digital input port
(depending on configuration). This allows for an additional way to trigger
events or functions (such as triggering relays, issuing commands, or sending
an e-mail).
2
Front panel Config port — This 2.5 mm mini stereo jack serves the same
RS-232 function as the rear panel Host Control port, but it is easier to access
than the rear port after the MLC has been installed and cabled. Digital input
is not available on this port. The optional 9-pin D to 2.5 mm stereo mini TRS
RS-232 cable (part #70-335-01, shown below) can be used for this connection.
This port has the same protocol as the rear panel port mentioned above but
does not offer digital input.
RS-232 protocol:
• 38400 baud
• 1 stop bit
• no parity
• 8 data bits
• no flow control
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
Both configuration ports require 38400 baud communication. This is a higher
speed than many other Extron products use. The configuration software
automatically sets the connection for the appropriate speed. If using
HyperTerminal or a similar application, make sure the PC or control system
connected to these ports is set for 38400 baud.
Maximum distances from the MLC to the device being controlled may vary up
to 200 feet (61 m). Factors such as cable gauge, baud rates, environment, and
output levels (from the switcher and the device being controlled) all affect
transmission distance. Distances of about 50 feet (15 m) are typically not a
problem. In some cases the MLC may be capable of transmitting and
controlling a given device via RS-232 up to 250 feet (76 m) away, but the
RS-232 response levels of that device may be too low for the MLC to be able to
detect.
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