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26 en | Hardware setup Digital Video Recorder 440/480 Series
AM18-Q0605 | v2.0 | 2012.04 Installation and Operation manual Bosch Security Systems
4.8 External 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.
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 Alarm output connector for 4 channels
Figure 4.10 Alarm output connector
DANGER!
Electrical voltage.
Risk of electric shock and damage to the unit.
The contacts must not be used at AC line voltages.