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ZMX+EXP32
Installation Instructions
CONNECTIONS
Camera Inputs
For each camera input there are a pair of BNC sockets, one for the camera input, the other for a looped through
output. If you connect to both BNC sockets, your expander unit automatically removes the 75 ohm termination
resistor. If you use the loop through facility make sure that your application (e.g. a monitor or VCR) provides 75
ohm termination at the end of the line.
Connect up to 16 camera inputs. You can use either the upper or the lower sockets. Connect your loop through
outputs to the through or spare BNC socket in each pair. If you have less than 16 cameras, you can disable
individual camera inputs in the menu system.
Monitors
Monitors C, D and E connect to the relevant 75 ohm BNC connectors. If you are connecting directly from the
expander unit to the monitor then select the 75 ohm impedance setting on your monitor.
Note that when the 32
way expander unit is used, Monitors C, D and E attach directly to the BNC connectors provided on the
expander unit and not the multiplexer. This is to ensure that the monitor signals are correctly terminated.
Alarm Inputs
Provision for alarm inputs is by means of a 25 way D-type connector. Wire the connector as shown in Figure 3.
Do not attempt to wire directly to the socket on the back-panel.
Fig 3. 25 way D-type Connector Numbering
Figure 3 above shows the connector, looking towards the rear panel. The numbers are labelled on the connector
itself.
Pin Numbers
Connections
1 to 16
Alarm Inputs 17 to 32
18, 19
Alarm Input Ground
Each alarm input line can be triggered by the relay contact from a device such as a pressure-pad, a passive
infrared detector, a smoke detector etc. (refer to the instructions provided with the device). You can configure the
alarm inputs to be Normally Open (N/O) or Normally Closed (N/C) via the menu system. Normally open and
normally closed configurations are shown in Figure 4. The alarms are disabled while the menu system is active.
Fig. 4 Normally Open and Normally Closed Connections
