Key Features

  • 6 x Class B initiating device circuits
  • Designed to meet UL864 10th Edition requirements
  • Each zone is monitored for open and short circuit
  • Quick and easy to install
  • Extensive front unit status indications


The VL-ZMB is a six-zone monitor module that is designed to be DIN mounted inside of a Velocity control panel. The VL-ZMB module has six class B zone monitors which can be used for conventional devices and/or specialist detectors that are not typically available as addressable devices such as aspirating smoke detectors, UV detectors and beam detectors.

The Velocity Class B Zone Monitor Module is quick and easy to install and is powered via its RJ45 connection to the control panel. It monitors and transmits the status (normal, open, short or alarm) of the devices in the zone to the fire alarm control panel and each zone input can be configured to give either a supervisory or alarm signal when active.

The unit also has LED indications to show when a zone is communicating with the motherboard, when an open circuit condition has been detected, when a short circuit condition has been detected and when an alarm/supervisory is active in the zone.


All components in the Velocity range are UL certified and comply with the requirements of Underwriters Laboratories (UL) 864 Control Units and Accessories for Fire Alarm Systems 10th Edition.

Tech Specs

Design StandardUL864 10th Edition
ApprovalUL Laboratories
Circuit Voltage26V DC Nominal (17.5V – 26.5V with EOL connected)
Wiring Class6 x Class B (Power Limited & Supervised)
Zone Max Current (under S/C conditions)56mA
Zone Max Line Impedance10Ω
End of Line Resistor4K7Ω
Triggering Resistor1KΩ
Operating Temperature0°C (32°F) to 49°C (120°F)
Max Humidity93% Non-Condensing
Dimensions (W x H x D)97mm x 103mm x 46mm
Recommended Cable Sizes22 AWG to 14 AWG (0.3mm2 to 2.5mm2)
Compatible DevicesVL-RS-01 (UL38 Listed)
Maximum Detectors Per Zone20



Velocity Class B Zone Monitor Module

Velocity Zone Monitor Module, Class B

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