American Dynamics Hybrid Digital Video Recorder, User Manual

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Hybrid Digital Video Recorder
Alarm Output - TTL
HDVR has 8/16 TTL Alarm Outputs that can be triggered by a variety of external events. In this
example, the HDVR is integrated with a building automation system through a 0-5 VDC Digital Input
Module for equipment or alarm status monitoring.
1. Connect any of the 8/16 TTL Alarm Outputs to the 0-5 VDC input
2. Connect ground to ground
You can set the “Normal State” of the Alarm Output to either High (5 VDC) or Low (0 VDC) on the
Alarm Output setup screen.
Audio Input
HDVR systems have multi-channel Audio Inputs that can be configured to record audio from line level
security microphones and other line level audio devices. The audio connections receive an unbalanced,
line-level audio signal only. Line-level signaling requires a voltage between -1 V and +1 V into an
impedance of 1 kΩ or more.
Microphones such as the Crown PZM11LL or Louroe Electronics ASK-4
KIT #101 pre-amplify the microphone signal and produce a line level output that is connected directly to
the HDVR audio inputs.
Building Automation / Control System
Status
Monitoring