The Xtralis VESDA VHX-0420 is the standard version of the VESDA Modbus Type 3 High Level Interface (HLI). It integrates a VESDAnet network with host monitoring platforms such as building management systems (BMS) and fire alarm control panels, which monitor and control VESDA devices by reading and writing registers in the Modbus map. A VESDAnet socket interface is needed to connect it to VESDAnet.
Key features
- Acts as a proxy for all VESDA devices on VESDAnet; the VESDA zone equates to the Modbus address field
- Supports VESDA VLP, VLS, VLC, VLF, VLI and VFT-15, and VESDA-E VEU, VEP, VES and VEA detectors
- Alarm and fault status, smoke level, detailed faults, alarm thresholds and operational status (normalisation, AutoLearn)
- Detector control including reset, disable, silence, alarm test and normalise
- Recommended by Xtralis for secondary monitoring; for primary reporting it must be listed as part of an approved fire system
Technical specifications
- Part number: VHX-0420 (VESDA Modbus Type 3 HLI Standard)
- Power consumption: 1.68 W (quiescent)
- Supply voltage: 24 VDC
- Current consumption: 70 mA (quiescent)
- Dimensions: 188 x 98 x 40 mm (approx.)
- Weight: 0.4 kg
- Detectors supported: up to 100
What's in the box
- VESDAlink RS-232 9-way serial cable (male-female)
- VESDAnet RS-485 15-way cable (male-female)
