MLC 104 IP Plus Series • Operation, Features, and Cabling
18
Wiring varies depending on the projector or display model. In most cases the drivers are
bidirectional, but sometimes only the transmit (Tx) and ground connections are needed
for projector or display control. For bidirectional RS-232 communication, the transmit,
ground,
and
receive pins must be wired at both the MLC and the projector or display.
NOTE:
Maximum distances between the MLC and 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 MLC 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 detect.
For infrared (IR) output (0 to +5 VDC)
, wire an IR Emitter
(2 emitters,
maximum, per port)
as shown below for a modulated or demodulated signal and
ground. The MLC can use infrared signals to control up to two devices. You can
connect one of these ports directly to the wired IR port of another device. Or you can
insert the wires from up to two IR Emitters into the IR Out port and place the heads of
the emitters over or next to the IR signal pickup windows of the controlled devices.
+V OUT
CM
GROUND
IR OUT
GROUND
SC
P
Tx
Rx
DISPLAY
RS-232/IR
A B C D E
COMM LINK
IR IN
LA
N
LA
N
+V
OUT
CM
G
R
OU
N
D
SC
P
A B C D E
A B C D E
COMM LINK
IR
IN
Projector
or Display
IR Receiver
or
(+)
(-)
(+)
(-)
(-)
(+)
Two Single IR Emitters
Ground
IR Output Signal
Ground
IR Output
Unidirectional
IR
White Striped
Wire
100' (30.5 m)
Unidirectional IR
Strip wires 3/16"
(5 mm) max.
Wired
IR Remote Port of
a Projector, Display
or Source Device
Infrared:
• TTL level (0 to 5 V)
• Up to 1 MHz
NOTES:
•
Each emitter must be within 100 feet of the MLC for best control results.
•
If installing two IR Emitters per port, wire them in series, not in parallel.
Display RS-232 / IR Port
Right
Side
Panel
Figure 8.
Wiring for IR Display Control
Alternatively, an MLC can use infrared signals and IR Emitters to control several source
devices. However, the direct insertion captive screw connectors on the MLC have
small openings that accept just one wire per pole. To connect up to two IR Emitters
to the MLC, insert one ground and one signal wire in the Display RS-232/IR port, then
connect the IR Emitters to those wires. To wire emitters, see the following figures and
the
IR Emitter Installation Guide
. Wiring directions depend on the number and type of IR
Emitters (single or dual).
Summary of Contents for MLC 104 IP Plus Series
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