Alarm I/O Connector - Baxall DVS14 Installation And Operating Manual

Installation and Operating Manual
The Alarm I/O Connector is a 15 way D-type connector located on the rear panel of the
DVS24A and DVS28A. It allows the connection of both alarm inputs and alarm outputs to
the switcher.
Alarm Inputs
Each alarm input can be connected to the normally-open contact of devices such as pressure
pads, passive infrared detectors, or smoke detectors etc. The alarm will be triggered when
the external contact closes. Wire the devices to the Alarms I/O Connector accordingly.
Pin 1
Alarm Outputs
An internal relay is provided so that the DVS can be connected to other equipment.
The behaviour of this relay can be programmed using the menu system, in order to suit the
alarm output connected. It can be configured so that when an alarm input is triggered, the
relay (and hence the alarm output) operates continuously or operates for one second from
the time the alarm is triggered. For more details on this configuration, see page 17.
The alarm relay operates in a fail-safe mode. When power is removed from the unit, the
relay reverts to its alarm condition.
NON-ALARM
CONDITION
ALARM
CONDITION
Figure 6 - Alarm Output Connection and Operation
GROUND
5 6 7 8
1 2 3 4
GROUND
DVS28A
Figure 5 - Alarm Input Connections
N/O
COM
N/C
INTERNAL
RELAY
N/O
COM
N/C

ALARM I/O CONNECTOR

Pin 1
1 2 3
DVS24A
Normally Open (N/O)
Pin 1
Normally Closed (N/C)
DVS Series
4
GROUND
Common
9