0V DC
24V DC
~
~
A1
A1
A2
A2
Example fit
protection diodes
when switching
external DC loads.
NC
COMM
NO
NC
COMM
NO
Example fit protection
supressors when
switching external AC
loads typical device
Farnell Ref 1438460
V+
4-20mA
24V DC
Beacon
Sounder
Electrical Interfaces
International Gas Detectors
Solid State Output
Relay Output
The Solid State Output Can be used
to Switch LED Beacon Sounders if
Required.
It is recommended to use IGD LED
Beacon Sounders
Part Number 5083101
When using Other Manufacturers
Devices do Not Exceed 100mA @
24V DC
The Annunciator relay output can be used as an alarm interface to external systems, run additional
audio visual alarms or directly control other devices. Typical applications could be gas solenoid
valves, boiler shut down interfaces or similar. When switching external loads it is important to
consider the nature of the load being switched. For inductive loads suitable protection from induced
back EMF must be fitted. Many modern devices conforming to the European EMC Directive may
already have devices fitted as part of their design to limit in-rush currents and back EMF. Where
these are not fitted the following two diagrams provide guidance. Failure to observe this may result in
damage to the Annunciator.
TOC-10 Unit 1
TOC-10 Unit 2
V+
4-20mA
Spare
I/O
0V
Spare
I/O
0V
Solid State Input From TOC-10 Gas Detector
The Solid State Input can be used to
interface to IGD TOC-10 Series
Flammable Gas Detectors. Wire as
Indicated and the Input Will Read the
Two Alarm Levels From the TOC-10.
This will display on an Addressable
Controller in the Same Manner as Any
Other Gas Detector.
Up to 6 TOC-10 Detectors can be Daisy
Chained to the Input
