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14 Pelco Manual C1927M (5/99)
3. Alarm inputs will be programmed in the
Programming
section for normally open or
normally closed operation.
Normally closed operation = current flow = alarm switch or relay closed
Normally open operation = no current flow = alarm switch or relay open
In the example in Figure 8, current flows through the contacts (switch) in the door
when it is closed. When the door is open, no current flows. To cause an alarm when
the door is opened, program the alarm input for normally closed (door is normally
closed). To cause an alarm when the door is closed, program the alarm input for
normally open (door is normally open).
4. If your VCR has an alarm input to change the VCR to its alarm recording speed when
the multiplexer receives an alarm, connect the VCR alarm input to the normally open
(NO) relay contact on the multiplexer. Connect a wire from the relay’s common (C)
connection to ground on the VCR.
Proceed to the
Powering the Multiplexer
section.
POWERING THE MULTIPLEXER
It is recommended that multiplexers being powered up for the first time or after extended
storage be initialized using the following procedure. This will clear any random data
remaining in the multiplexer and initialize the memory for user programming.
1. Turn on power to your cameras, monitors, and any other equipment that is connected
to the multiplexer.
2. Plug in one end of the power cord into the multiplexer.
3. Press and hold the VIEW button on the front panel of the multiplexer while you plug
the power cord into an electrical outlet. When the Initialization Menu appears, release
the VIEW button. The monitor will indicate PLEASE WAIT and begin a 20-second
countdown. When the countdown has been completed, the Initialization Menu will
disappear, all programming menus will be at their default settings, and the multiplexer
will be ready for use.
If you are installing your system with a KBD4000 keyboard or MX4000SVR Multiplexer
Server, proceed to the appropriate section for further installation instructions.
MULTIPLEXER WITH KBD4000 KEYBOARD
Refer to Figure 2 in the
Applications
section for an overview of a typical installation.
1. Follow the instructions in the
Basic Installation
section to mount the multiplexer; to
connect cameras, monitors, VCR, and alarms; and to power-up the multiplexer.
2. A maximum of 16 multiplexers can be daisy-chained together. If you are going to
daisy-chain multiplexers, use the 6-foot (1.8 m) data cables that are supplied with the
multiplexers. Connect a cable from the COM OUT port of the first multiplexer to the
COM IN port of the second multiplexer, then connect the COM OUT port of the second
multiplexer to the COM IN port of the third multiplexer, etc.
3. Proceed to the KBD4000 Genex™ Multiplexer Keyboard Installation/Operation Manual
to complete the installation, which involves setup and connection of the KBD4000
keyboard, and programming the multiplexer.