Key Features
- 2 x class B NAC output circuit (500mA maximum load per circuit)
- Designed to meet UL864 10th Edition requirements
- Built-in synchronization circuitry
- Each circuit can be programmed as a 24v auxiliary (500mA maximum load per circuit)
- Extensive front unit status indications
Overview
The Velocity Class B Notification Appliance Circuit Module (VL-NCB) provides power for, and handles communications to, the non-addressable notification appliances.
It has two notification appliance circuits that can be wired in class B configuration. Up to 500mA can be connected to each class B circuit. Each circuit is monitored for open short and earth trouble conditions and will report the status of each circuit back to the Velocity MMP fire alarm control panel. The VL-NCB also has extensive status indications on the front of the unit.
These class B notification modules can be programmed for either unsynchronized bells or synchronised horns/chimes and beacons on each circuit. The VL-NCB can also be programmed as a 24v auxiliary special application class B output, which can be used to provide power to external equipment.
VL-NCB modules are easy to install by simply connecting it to the control panel using an RJ45 cable.
Approvals
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 Standard | UL864 10th Edition |
| Approval | UL Laboratories |
| Circuit type | Regulated 24V DC Power limited & Supervised |
| Maximum NAC Current | 2 x 500mA |
| Maximum RMS current for a single notification appliance | 350mA |
| Maximum Line Impedance | 3.6Ω (1.8Ω per core) |
| Wiring Class | 2 x Class B [Power limited & Supervised] |
| Special Applications | Auxiliary 24V DC Output [Power limited & Unsupervised] |
| Synchronisation | Selectable at each module as: Sounder (uses synchronisation protocol for horn strobes) Bell (will pulse the output voltage to give the required temporal pattern) |
| Operating Temperature | 0°C (32°F) to 49°C (120°F) |
| Max Humidity | 95% Non-Condensing |
| Dimensions (W x H x D) | 57mm x 105mm x 47mm |
| Weight | 0.15kg |
| Terminal Wiring Size | 18 AWG to 14 AWG (0.8mm2 to 2.5mm2) |
