VESDA ECO Detector by Xtralis
Product Guide
17898_05
Installation
13
Cable Specification
The 8 way screw terminals located on the main PCB will accept wire sizes up to 1.0
mm
2
(17AWG). It is not practical to use cable of this size if more than half of the
terminals are to be used, due to the internal restrictions of space and the size of the
cable entries.
It should also be noted that the connections of SKT2 must be made using a
screened twisted pair cable. The screen of this cable should be terminated at the
Screen terminal (pin 5) of connector SKT2 at one end and to the return (0V)
reference of the power supply system at the other. See Figure 6 below.
Figure 6 Cable screen connection
When selecting the twisted pairs to connect, keep consecutive terminal connections
paired together, i.e. Pin 1 paired with 2, pin 3 paired with pin 4 and pin 7 paired with
pin 8. The spare connection paired with the Digital Input/Open Collector terminal
(pin 6) should be connected to the 0V terminal (pin 4).
