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

Technical Specifications

• Brand: Honeywell
• Manufacturer Part Number: THM5421R1021/U
• Product Type: Equipment Interface Module
• Compatibility: Prestige IAQ and VisionPRO 8000 with RedLINK
• Control Capacity: Up to 4 Heat / 2 Cool (heat pump) or up to 3 Heat / 2 Cool (conventional)
• Input Voltage: 18-30 VAC
• IAQ Contacts: 3 sets of universal IAQ contacts (humidification, dehumidification, ventilation)
• Sensor Inputs: 4 sensor inputs for wired sensors or dry contact devices
• Mounting Type: Wall mount
• Enclosure Material: Plastic
• Operating Temperature: -40 to 165°F
• Dimensions: 9.3125 x 4.8125 x 1.625 inches
• Weight: 0.90 lb
• Terminals: R, RC, RH, C, W-O/B, W2-AUX1, W3-AUX2, Y, Y2, G, A-L/A, U1, U2, U3, S1, S2, S3, S4, A, B, C, D
• Application: Residential and light commercial