Honeywell THM5421R1021/U Equipment Interface Module 18-30 VAC (Single) THM5421R1021/U

Product Description

The Honeywell THM5421R1021/U is an equipment interface module for Prestige IAQ and VisionPRO 8000 thermostats with RedLINK. It supports up to 4 heat/2 cool heat pump or 3 heat/2 cool conventional configurations, operates on 18–30 VAC, and provides three universal IAQ contacts plus four sensor inputs for wired sensors or dry contact devices. The module is configurable for residential and light commercial installations and mounts in a wall-mount plastic enclosure.

• Supports up to 4 heat / 2 cool (heat pump) or up to 3 heat / 2 cool (conventional) stages
• Operates on 18–30 VAC and provides three universal IAQ contacts for humidification, dehumidification, and ventilation control
• Includes four sensor inputs for wired sensors or dry contact devices; compatible with Prestige IAQ and VisionPRO 8000 with RedLINK

Product Highlights

Multi-stage HVAC control; three IAQ contacts; four sensor inputs; RedLINK compatibility; wall-mount enclosure.

Product Information

Standard Information

• Brand: HONEYWELL
• Manufacturer Part Number: THM5421R1021/U