Honeywell 4229 Zone Expander Module

Honeywell 4229 8-Zone Expansion Module with 2 Relay Outputs

Overview

The Honeywell 4229 combines eight hardwired zone inputs with two programmable relay outputs in a single V-Plex polling loop module. Each relay is rated at 2 A at 28 VAC/DC, providing direct control of external devices such as door locks, lighting circuits, or auxiliary sounders from the VISTA panel programming.

Deployment scenarios

The 4229 is suited for commercial installations requiring both zone expansion and automation outputs. Common applications include triggering magnetic door holders on fire alarm, activating strobe lights during intrusion events, controlling HVAC shutoff relays, or switching auxiliary power to notification appliances. The dual-purpose design reduces the number of modules needed on the bus.

Integration and compatibility

The module connects to the V-Plex data bus and is compatible with VISTA-15P, VISTA-20P, VISTA-50P, VISTA-128BPT, and VISTA-250BPT panels. Zones support normally closed or end-of-line resistor supervision. Standby current is 15 mA, rising to 100 mA with both relays energized. Power is supplied from the panel 12 VDC auxiliary output.

Installation notes

Dimensions are 6-1/2" W x 4-1/4" H x 1-1/4" D (169 mm x 108 mm x 32 mm). Operating temperature range is 32 F to 122 F (0 C to 50 C). Relay contacts are dry, so external power must be supplied for the controlled device circuit. Zone and relay addresses are configured via DIP switches.

Marty Allison

The 4229 is the module I reach for when a VISTA job needs both more zones and relay-controlled outputs. Having relays on the same board as the zone expander saves panel enclosure space and simplifies wiring.

Technical Highlights:

• Dual function: 8 zones plus 2 relay outputs eliminate the need for a separate relay module
• Relay rating: 2 A at 28 VAC/DC handles most common automation loads directly

Deployment Considerations:

• Calculate total bus current draw when both relays are active to ensure the panel transformer can support the load
• Use flyback diodes when switching inductive loads like door holders to protect the relay contacts

If your project only needs zone expansion without relay outputs, the 4208U is the lighter option. But for any installation that requires automation triggers, the 4229 earns its place on the bus.