VESDA
VESDA Sensepoint XCL – Large Bore Installation Manual
35563_02
11
Detector Source Mode with AC Power
1
2
1
1
2
3
4
2
VE−
VIN−
VIN+
VE+
4–20mA
4–20mA
R
L
COM
COM
24 VAC
Legend
1
External power supply
2
VESDA Sensepoint XCL
detector
3
System controller
4
Current flow
Detector Sink Mode with AC Power
1
2
1
1
2
3
4
2
R
L
24V
DC
VE−
24 VAC
VIN−
VIN+
VE+
4–20mA
4–20mA
COM
COM
Legend
1
External power supply
2
VESDA Sensepoint XCL
detector
3
System controller
4
Current flow
2.6
Wiring of Modbus Output Versions
Modbus Connection
For Modbus versions, up to 32 VESDA Sensepoint XCL detectors can be connected in a daisy chain
arrangement as shown in the diagram below.
Note:
Where possible, spur or ‘T’ connections should be avoided. Always keep the spur connection as
short as possible.
Cable Specification for Modbus Connection
Type
Cable Spec
Max Length
Modbus
0.5 mm
2
to 2.5 mm
2
twist pair shied cable
1000 m
Summary of Contents for VESDA Sensepoint XCL
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