Honeywell Touchpoint 4 Manual

   Installation
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The next diagram shows the 3-wire detector power/signal terminal block layout with terminal 
identifiers.
The table lists the detector power/signal terminals and their functions and specification.
Zareba Sensepoint Gas Detector Connections
Touchpoint 4 is specifically designed for use with the Zareba Sensepoint range of gas detectors.
The subsequent diagrams show connection details for these units. 
For further information about Zareba Sensepoint...

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   Installation
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Generic Gas Detector Connections
The following diagrams show generic installation connections for other gas detectors.
3-Wire mV Detector
3-Wire 4-20 mA Detector
1
2
31
2
3 +ve
Signal+ve
Signal
-ve
-ve
1
2
33Detector Controller 

   Installation
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2-Wire 4-20 mA Detector
Maximum Cable Lengths
To calculate the maximum cable run length from power source to the detector refer to the
following example diagram and formula.
Rloop = (Vcontroller — Vdetector min) / Idetector
Maximum cable run length = Rloop / cable per metre resistance
where:
R
loop  =  maximum working cable run resistance
V
controller =  maximum available supply voltage at controller
V
detector min  =  minimum voltage at which the...

   Installation
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Vsupply
Vsensor
Imax
0 V
Signal Cable run
ControllerDetector
R
l 

   Operation
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WARNINGS
Access to the interior of the controller, when carrying out any work, 
must only be conducted by trained personnel. Switch off and isolate 
the power supply to the controller when access is required. 
Take any necessary precautions to prevent false alarms.
Once powered and connected properly with the gas detector(s), Touchpoint 4 displays gas
concentration, alarm, fault and status information on each 
Channel Module, and shows channel and
system...

   Operation
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Information on the Displays
At switch on:
• all display icons/text/numbers/symbols 
on the Common Module are lit
• all LEDs on the Common Module are lit
•  the alarm buzzer sounds for 1.0 seconds. 
This sequence repeats twice and is the 
controller’s self-test procedure.
The Common Module display then shows:
• local time and date
• power LED indicator lit
         
The Common Module then tries to communicate
with any connected individual Channel Module to...