VDOT-ASD-400 Aspiration Detector
Velocity Detection
17
VDOT-ASD-400 Aspirating Smoke Detector User’s Manual V1
l
Fire-1 (NO)
l
Fire-2 (NO)
l
Aux (NO)
Note: NO=Normally Open
NC=Normally Closed
Com=Common
The relay rating is 2A@30Vdc. If load connected is more than the relay rating, a transfer relay
suitable for the rating should be used.
Every relay has its indicator (LED) on board to indicate it’s on/off status. It’s easy for the user to
know the relay status and to trouble shoot if the connected device doesn’t go out properly.
All relays are configurable to one of the following functions: Alert, Action, Fire 1, Fire 2, Fault,
Isolate, and Auxiliary. The relay output function printed on the termination board is the factory
default setting. Users can change the relay function using the front panel display or the
Management computer Software to change the setting. However, the second relay, which
circuit is designed to normally closed to give a trouble signal when the device is powered off.
Care should be taken for the relay’s NO or NC connection when changing relay functions.
o
GPI, General Purpose Input
There are eight General Purpose Input terminals on VDOT-ASD-400 termination board. Those inputs
are designed to monitor the status of the connected devices. The connected devices monitored by
the GPI can be just a button, a fault relay from the power supply, or even alarm relay from other
detector. Short circuit the pair of the input pins makes ASD to activate associated function defined
in the GPI settings. There are 16 possible functions falls in the following categories:
l
Device Control: Reset, Isolate, Silence, Test, Scan,
The GPI terminal can be connected to a remote button, a control/output module of the fire
alarm system, or a PLC so those control function can be performed remotely, or by other
systems.
l
Power Fault Monitoring: Mains Fault, Battery Fault, Power Fault
It is sometimes required by local code that the fault status of the mains and/or battery
condition of the detector’s power supply should be monitored. In this case, the ASD detection
device will signal a fault when the connected relay of power supply is activated. The ASD fault
