24
Mains Power and Controller Overview
Incoming Panel Earth
L N
Earth Point for
Cable Screens
For Detector Nodes,
Comm’s Connections
Controllers with mains power supplies must be fed via
a unique fused spur fused at 3A.
Note incoming Earth connection
Use ferrules or 4mm fork crimps to prevent stray wire
strands and potential shorting
Power supplies are switched mode types.
Note dependent on PSU type the incoming voltage may require to be set using a switch setting
between 110V AC and 230V AC. If this is the case note the current switch setting indicated on the
PSU label before connecting power. If the setting requires changing to suit the incoming voltage
then make this change before connecting power and re-label accordingly.
Failure to ensure the PSU is correctly set to match the incoming voltage will result in
permanent damage.
CONTROLLERS MUST BE CORRECTLY EARTHED TO ENSURE CORRECT OPERATION
Summary of Contents for 2-Wire Systems
Page 4: ...3 SECTION 1 MOUNTING DETAILS FOR EQUIPMENT...
Page 9: ...8 SECTION 2 SITING GAS DETECTORS...
Page 16: ...15 SECTION 3 GENERAL CABLING PRINCIPLES CABLE TYPES AND CABLE SIZING...
Page 23: ...22 SECTION 4 MAKING DEVICE CONNECTIONS TO DETECTOR NODES...
Page 35: ...34 SECTION 4 Control Panel Interfaces and Connections...
Page 51: ...50 Notes...
