Network Option Card Rs485 Class A/B Wiring
Kidde Commercial

Network Option Card Rs485 Class A/B Wiring

SKU KD-VM-NOC

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The VM-NOC RS-485 Network Option Card links up to eight VM Series panels into a single networked life safety system, carrying both network data and digital audio communications on two independent RS-485 circuits. Class A or Class B wiring is supported on both circuits, so the network topology matches whatever the job's riser design calls for.

Built for the commercial fire installer

On multi-building or multi-panel campus jobs, the VM-NOC is what turns standalone VM panels into a coordinated network — shared event reporting, coordinated audio messaging, and centralized annunciation across up to eight control panels. Twisted-pair wiring runs up to 5,000 ft. between any three panels, which covers most campus and high-rise riser distances without repeaters.

Key features

  • Networks up to eight VM-1 panels on a single RS-485 network
  • Two independent RS-485 circuits: one for network data, one for digital audio
  • Class A or Class B wiring (Style 6 or Style 4) on both circuits
  • 5,000 ft. max. wire run between any three panels on the network
  • Isolated network audio circuit keeps a single fault from bringing down panel-to-panel audio

System compatibility

Installs on a Kidde VM Series control panel. For fiber-based networking instead of RS-485 copper, Kidde also offers the VM-NOCF fiber network option module.

Specifications

SKUKD-VM-NOC
BrandKidde Commercial
Form factorRS-485 network option card, VM panel mount
Compatible panelsKidde VM Series life safety control systems (up to 8 networked panels)
Operating voltage / current24 VDC; 98 mA standby, 98 mA alarm
Signal level5 Vp-p
Circuit designationNetwork data: Class B (Style 4) or Class A (Style 6); Network audio: Class B (Style 4) or Class A (Style 6)
Wire sizeTwisted-pair, 6 twists/ft. min., 18 to 12 AWG (0.75 to 2.5 mm²)
Circuit length5,000 ft. (1,524 m) max. between any three panels
Circuit resistance / capacitance90 Ω max.; data 0.3 µF max., audio 0.09 µF max.
Operating temp / humidity32 to 120°F (0 to 49°C), 0 to 93% noncondensing

Documents and resources

FAQs

How many panels can the VM-NOC network together?
Up to eight VM-1 control panels on a single RS-485 network.
Does the VM-NOC carry audio as well as data?
Yes. It provides two independent RS-485 circuits — one for network data, one for digital audio communications between panels.
Is Class A wiring supported?
Yes, on both the network data and network audio circuits (Style 6), in addition to Class B (Style 4).
What's the maximum wiring distance?
5,000 ft. (1,524 m) between any three panels on the network, using twisted-pair 18 to 12 AWG wire.
All Kidde Commercial