VESDA LaserCOMPACT, Руководство по эксплуатации продукта

Страница: 29 / 42

VESDA
® LaserCOMPACT Product Guide
21
VESDAnet Terminals (VN Model only):
The LaserCOMPACT detector can be connected to VESDAnet through VESDAnet Terminals on
the Termination Card. The terminals enable VESDAnet communication cables to be brought into
the detector and then looped out to another device. Data communication between the detector
and other devices on VESDAnet are bidirectional. The polarity of the data wires must be
maintained throughout the network. It is recommended that RS 485 (BELDEN 9841 - 120 Ohm)
twisted pair cables (or similar) be used. The LaserCOMPACT is shipped without the VESDAnet A
and B channels looped. If the detector is not to be networked with other devices, then loop the A
and B channels.
Figure 16 - Stand -alone VESDAnet connection for LaserCOMPACT
Figure 17 - An example of the wire connection for VESDAnet
(closed loop)
Relay terminals
There are three relays designated Fault, Pre-Alarm and Fire. The relays can be used to connect
to the fire alarm control panel or to activate external devices. The default relay states are non-
energized except the fault relay, which is set to the energized state on power up. The relays can
be programmed to either state.