Eneo DIR-4108H Series Operating Instructions Manual page 8

Operating Instructions
If you prefer to use a standard CCTV monitor, connect it to the Video Out connector.
NOTE: The DVR does not support simultaneous operation of a CCTV and a VGA monitor.
Connecting to the RS232C Port
The RS232C port can be used to control PTZ (pan, tilt, zoom) cameras.
Connecting Alarms
NOTE: To make connections on the Alarm Connector Strip, press and hold the button and insert the wire in
the hole below the button. After releasing the button, tug gently on the wire to make certain it is connected. To
disconnect a wire, press and hold the button above the wire and pull out the wire.
AI 1 to 16 (Alarm-In): You can use external devices to signal the DVR to react to events. Mechanical or electrical
switches can be wired to the AI (Alarm-In) and GND (Ground) connectors. The threshold voltage for NC (Normally
Closed) is above 4.3V and for NO (Normally Open) is below 0.3V, and it should be stable at least 0.5 seconds to be
detected.
GND (Ground): Connect the ground side of the alarm input and/or alarm output to a GND connector.
NOTE: All the connectors marked GND are common.
NC/NO (Normally Closed/Normally Open): Connect the device to the C (Common) and NC (Normally Closed)
connectors or C and NO (Normally Open) connectors. NC/NO is a relay output which sinks 2A@125VAC (NC) and
1A@30VDC (NO).
ARI (Alarm Reset In): An external signal to the Alarm Reset In can be used to reset both the Alarm Out signal and
the DVR's internal buzzer. Mechanical or electrical switches can be wired to the ARI (Alarm Reset In) and GND (Ground)
connectors. The threshold voltage is below 0.3V and should be stable at least 0.5 seconds to be detected. Connect the
wires to the ARI (Alarm Reset In) and GND (Ground) connectors.
Connector Pin Outs:
6
Alarm Inputs 1 to 16
AI (1 to 16)
Alarm Out (Normally Closed)
NC
Common
C
Alarm Out (Normally Open)
NO
Alarm Reset In
ARI
Chassis Ground
GND