Bosch Appliances DVR 440, DVR 480 8External alarm I/O connection, Connecting the inputs

26 en Hardware setupDigital Video Recorder 440/480 Series

4.8External alarm I/O connection

Alarm inputs and outputs are supplied screw down terminal blocks. The screw terminal blocks are supplied with the unit.

Connecting the inputs

Each (alarm) input line can be switched by a contact from external devices. Wire them as either Normally Open (N/O) or Normally Closed (N/C). Configure the alarm inputs as N/O or N/C in the menu system. The default is N/O.

Specifications

Alarm input impedence: Internal pull-up 10 K to +5 V

Input voltage range: -2 VDC minimum to 15 VDC maximum

Input voltage threshold: low voltage 0.5 V maximum, high voltage 2 V minimum

Cable cross section: AWG 26-16 (0.13-1.5 mm2)

Connecting the alarm output

The alarm output relay responds to input alarms and triggers. Configure the alarm output as N/O or N/C in the menu system. The relay is active for the duration of the driving event. Only connect resistive loads to the alarm output relays. Do not exceed 30 Vac, 24 Vdc, 500 mA (continuous), or 10 VA on an alarm output relay's contacts.

DANGER!

Electrical voltage.

Risk of electric shock and damage to the unit.

The contacts must not be used at AC line voltages.

Specifications

Switching current (resistive): 500 mA maximum

Switching voltage (resistive): 30 VAC/24 VDC maximum

Cable cross section: AWG 26-16 (0.13-1.5 mm2)

Figure	4.9
Figure	4.10

Alarm output connector for 4 channels

Alarm output connector

AM18-Q0605 v2.0 2012.04 Installation and Operation manual Bosch Security Systems