Kramer Electronics VM-114H4C - Manual (Page 13)

KRAMER: SIMPLE CREATIVE TECHNOLOGY
Using the VM-114H4C
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To connect to the VM-114H4C via RS-232:
• Connect the RS-232 9-pin D-sub rear panel port on the product unit via a
9-wire straight cable (only pin 2 to pin 2, pin 3 to pin 3, and pin 5 to pin 5
need to be connected) to the RS-232 9-pin D-sub port on your PC
5.4 RS-232, IR Control and Pass-through
The VM-114H4C can be controlled via RS-232 and infrared. Depending on how
the RS-232 and IR connections are configured dictates whether the device will
respond to control signals or transparently pass them through to another receiver or
transmitter. Three examples in
Sections 5.4.2.1 , 5.4.2.2 and 5.4.2.3 of various
configurations illustrate this functionality.
5.4.1 RS-232 Control and Pass-through Using the VM-114H4C
As shown in Figure 3 , you can connect a PC (or other serial controller) directly to
the VM-114H4C to control the VM-114H4C.
The VM-114H4C also transparently passes bidirectional RS-232 signals over the
CAT 5 cable from the TP-573 transmitter to the TP-574 receiver. For example, a
PC connected to the RS-232 port on the TP-573 can control an RS-232-
controllable device (for example, a projection screen) connected to the TP-574.
Figure 4: VM-114H4C RS-232 Control and Pass-through
5.4.2 Local IR Control and IR Pass-through Using the VM-114H4C
The VM-114H4C provides an IR sensor and a 3.5mm mini jack for connecting a
remote IR emitter or sensor. When the VM-114H4C is connected to suitable
transmitters and receivers (for example, the TP-573 and TP-574), the
VM-114H4C can act as a pass-through for IR control signals, allowing remote
control of multiple devices using multiple IR remote controllers.