Vesda VHX-1400

Vesda VHX-1400 Metal Box HLI Modbus Type 1

The VESDA Wall-mounted ModBus High Level Interface (HLI) links your VESDAnet with PC software monitoring tools, Building Management Systems (BMSs) or Fire Alarm Control Panels (FACPs), otherwise known as `host’, that support the ModBus protocol. There are two models available:

Wall-mounted ModBus HLI Type 1 (VHX-1400) which echoes each character received on the RS232 link back to the host together with reply message.
Wall-mounted ModBus HLI Type 2 (VHX-1410) which has the echoing function disabled.
One ModBus HLI is used to interface to a VESDAnet. Modbus HLI supports up to a maximum of 40 VESDA detectors on a VESDAnet.The Modbus HLI supports VESDAnet detector zone numbers between 1 to 200. The Modbus HLI divides up the address range into to 7 logical networks. For example, the first 30 addresses are considered in network 1, addresses between 31 to 60 are in network 2 and so on.

Information available using the VESDA Modbus HLI

Detector Type (VLP, VLS, VLC, VLF).
Fault Status (Head, Battery and Mains, Flow, Scanner2 ).
Detector Alarm State (Alert, Action, Fire).
Smoke Level
Smoke Bargraph Level
Detector Alarm thresholds (Alert, Action, Fire)
Reset Detector
Isolate Detector
Start Scan Test2