Equipment Interface Module for Prestige IAQ and VisionPRO 8000 w/ RedLINK


Brand: Honeywell

Mfr Part#: THM5421R1021

Availability: In Stock
Usually ships: within 1 business day
Qty Price
$47.95 / each
  • Description
  • Literature
  • Reviews
  • FAQs

Equipment Interface Module controls up to 4-stages of heat and 2-stages of cool in a heat pump system and up to 3-stages of heat and 2-stages of cool in a conventional system. Three sets of Universal IAQ contacts to control humidification, dehumidification, and ventilation. Four sensor inputs for wired sensors or dry contact devices.

Technical Specifications:

  • Dimensions (Height x Width x Depth): 9 5/16" x 4 13/16" x 1 5/8" (237.4mm x 122.5mm x 40.6mm);
  • Mounting: Vertical;
  • Operating Humidity Range (% RH): 5 to 95% RH, non-condensing;
  • Operating Temperature Range: -40°F to 165°F (-40°C to 73°C);
  • Color: Gray;
  • Terminal Designations: R, RC, RH, C, W-O/B, W2-AUX1, W3-AUX2, Y, Y2, G, A-L/A, U1, U1, U2, U2, U3, U3, S1, S1, S2, S2, S3, S3, S4, S4, A, B, C, D;
  • Application: Gas, oil, electric, heat pump, forced warm air, hot water, steam or gravity;
  • Includes: THM5421R1021 Equipment Interface Module;
  • Used With: All THX9421R5021 Prestige 2-Wire IAQ Thermostats and all versions of Prestige IAQ Thermostats and the VisionPRO Thermostats with RedLINK technology;
  • Electrical Ratings: 18 to 30 Vac;
  • Frequency: 50 Hz, 60 Hz;
  • Stages: Up to 4 Heat / 2 Cool Heat Pump or Up to 3 Heat / 2 Cool Conventional;
  • Supply Voltage: 18 to 30 Vac;
  • Power Method: Hardwired;
  • Cool Current: 1.0 A (running);
  • Heat Current: 1.0 A (running);
  • Fan Current: 0.5 A (running);
  • Electrical Connections: Screw terminals.
No reviews yet
Indicate an email address where you wish to receive the answer to your question.
Enter numbers shown above without spaces. This step helps us to prevent automatic submissions.
The following was added to your shopping cart: ×

Forgot Your Password?

Enter your e-mail address below.
You will receive an e-mail
with password reset instructions.


Estimate Delivery Date & Cost

Ship to Zip Code:
Qty (Optional):