Connecting Alarm Inputs And Outputs; Figure 2-9 Rs485 Port; Figure 2-10 Alarm Input Connectors - Honeywell HRSD8 User Manual

Installation
Caution
Connecting the RS485 Port
The DVR can be controlled remotely by an external device or control system, such as a
control keyboard, using RS485 half-duplex serial communications signals. The RS485
connector can also be used to control PTZ (pan, tilt, zoom) cameras. Connect the RX-/
TX- and RX+/TX+ of the control system to the TX-/RX- and TX+/RX+ (respectively) of
the DVR. See
manufacturer's manual for configuring the RS485 connection.

Connecting Alarm Inputs and Outputs

AI 1 to 16 You can use external devices to signal the DVR to react to events. Mechanical or
(Alarm-In) electrical switches can be wired to the AI (Alarm-In) and GND (Ground) connectors The
voltage range of the alarm input is from 0V to 5V. When the electrical switch is wired,
the threshold voltage for NC (Normally Closed) is above 2.4V and for NO (Normally
Open) is below 0.3V, and it should be stable at least 0.5 seconds to be detected. See
Chapter 3, Configuration
Document 800-03650 Rev D
02/09
The network connector is not designed to be connected directly
with cable or wire intended for outdoor use.
Chapter 3, Configuration
Figure 2-9 RS485 Port
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 ensure that it
is connected. To disconnect a wire, press and hold the button
above the wire and pull out the wire.
Figure 2-10 Alarm Input Connectors
for configuring alarm input.
and the PTZ camera or remote controller
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