Hardware Setup; Camera Connections; Audio Connections - Bosch DVR-451-04A050 Installation And Operation Manual

Video Recorder 400 Series
4

Hardware setup

This chapter contains detailed information about the hardware installation and connection of
external equipment to the unit. The connector types and their pin signals are described. Most
of the connectors are located at the rear panel of the unit. For convenience, one USB port is
located on the front of the unit to connect a mouse or memory device.
All the input/output ports are Safety Extra Low Voltage (SELV) circuits. SELV circuits should
only be connected to other SELV circuits.
4.1

Camera connections

Connect cameras to the VIDEO IN connectors on the back of the unit using 75 ohm video
coaxial cables with BNC connectors. Optionally, this signal can be looped through to other
equipment via the corresponding VIDEO OUT connector. The camera input connectors are
auto-terminating. There is no need to add a terminator to the output connector if no
additional equipment is connected.
If the camera signal is looped through to additional equipment, make sure that the end of the
video connection is terminated with 75 ohm termination.
The DVR 400 Series automatically configures itself as a PAL or NTSC unit. The unit determines
the standard by detecting the signal format of the VIDEO IN 1 during startup. The unit can also
be manually set to PAL or NTSC in the 'Camera menu' under 'Video format'.
Specifications
Input signal: Composite video 1 Vpp, 75 ohm
Color standard: PAL/NTSC, auto-detect
Gain control: Automatic gain control for each video input
Connector type: BNC looped-through, automatic termination
Figure 4.1 Four video inputs with loop-through outputs
4.2

Audio connections

The DVR 400 Series supports up to 4 audio inputs and 1 audio output. Connect using audio
cable with RCA (CINCH) compatible connectors.
–
–
Specifications
Input signal: Mono RCA (CINCH), 1 Vpp, 10k ohm
Output signal: Mono RCA (CINCH), 1 Vpp, 10k ohm
Figure 4.2 Audio output and input connectors for the Advanced Recorder
Bosch Security Systems
4 audio inputs are provided on the Advanced Recorder
1 audio input is provided on the Basic Recorder
Installation and Operation manual
Hardware setup | en 21
F.01U.168.054 | v1.1 | 2010.06