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VESDA
®
2. Cabling Requirements
The terminals on the termination card in the LaserSCANNER will accept wire sizes up to 2.5sq
mm (12 AWG).
2.1 Power Cables
Use the power ratings for the detector and the modules to determine the required wire sizes.
Refer to the table below for power ratings.
2.2 Power Consumption
The power requirements for the detector to operate are as follows:-
Operating voltage: 18VDC to 30VDC
LaserSCANNER with
Blank Plates @ 3000rpm
LaserSCANNER with
Blank Plates @ 3500rpm
LaserSCANNER with
Blank Plates @ 4000rpm
LaserSCANNER with
Blank Plates @ 4200rpm
Programmer Module
Display Module Only
Table 1 Power and Current Consumption for LaserSCANNER Detector and Modules
2.3 Data Cables
The recommended RS 485 data cable for interconnecting to other detector units on the
VESDAnet loop is Belden 9841 (or equivalent). The cable characteristics are as follows:-
•
24 AWG, Twisted pair, Shielded, 120 ohms impedance
The maximum specified length for the RS485 cable between any two devices on VESDAnet is
1300m (4000ft).
Version 1.3
Power Consumption (W)
@ 24VDC
Quiescent
With Alarm
5.76
7.44
6.96
8.64
7.68
9.12
8.16
9.6
1.08
1.44
(Backlight Off)
(Backlight On)
1.44
2.64
LaserSCANNER Installation Manual
Current Consumption (mA)
@ 24VDC
Quiescent
With Alarm
240
310
290
360
320
380
340
400
45
60
(Backlight Off)
(Backlight On)
60
110
3
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