Honeywell HRSD40F, User Manual

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HRSD40F DVR User Guide
Figure 2-5 RS232 Port Connection
Connecting Alarm Inputs/Outputs
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.
Figure 2-6 Alarm Input/Output Connector Strips
AI 1 to 4 (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. You can use external devices to signal the DVR to react to events.
Mechanical switches can be used to open/close the circuit between AI and GND to
trigger an event. You can also use electrical switches to apply electric voltage to an AI
(0V to 3.3V) to trigger an alarm with common ground. An electric voltage of 2.4~3.3
VDC for 0.5 seconds is required to trigger an alarm on NC (Normally Closed) Alarm In.
For NO (Normally Open) Alarm In, an electric voltage below 0.3 VDC for at least 0.5
seconds is required to trigger an alarm. See
Chapter 3, Configuration for configuring
alarm input.
G (Ground)
Connect the ground side of the Alarm input and/or alarm output to the G connector.
AI1 AI2 AI3 AI4 G ARI
NO C NC G