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Gray rectangular wireless wiring module with terminal connections

Honeywell

Honeywell THP9045A1023 Wireless Wiring Module Gray

SKU CH-P1Z8-2EJAC

Wireless wiring module adds a fifth connection for THX9000 thermostats when only four wires exist

  • ColorGray
  • Selling UnitEach
  • Wireless wiring module adds a fifth wire where only four exist
  • Compatible with THX9000 series thermostats for direct system integration
  • Gray colour matches standard HVAC equipment aesthetics
  • Compact 4-1/4 in height fits tight control panels
  • Terminal block includes Rc, K, W-O/B, Y, G, C connections

Honeywell THP9045A1023 Wireless Wiring Module

The Honeywell THP9045A1023 is a wireless wiring module designed for HVAC control systems. It connects to THX9000 series thermostats to enable communication without a full wire run. Installers use it when the existing cable has only four conductors but the thermostat requires five. The gray housing matches common equipment aesthetics.

Works only with THX9000 series thermostats

This module is built exclusively for the THX9000 series and will not pair with other thermostat families. It bridges the missing conductor by sending the extra signal wirelessly between the module and the compatible thermostat. The link is limited to the proprietary protocol used by that series. No other controllers or smart-home hubs are supported.

Adds a fifth logical wire over a four-wire cable

The single deciding specification is the ability to create a fifth logical connection when only four physical wires exist. The module provides terminals for Rc, K, W-O/B, Y, G and C connections to the equipment. If the installation already has five or more wires, this module is not required. It solves only the specific four-to-five wire gap.

Highlights

  • Wireless wiring module adds a fifth wire where only four exist
  • Compatible with THX9000 series thermostats for direct system integration
  • Gray colour matches standard HVAC equipment aesthetics
  • Compact 4-1/4 in height fits tight control panels
  • Terminal block includes Rc, K, W-O/B, Y, G, C connections

Specifications

BrandHoneywell
ColorGray
Selling UnitEach

Questions about this item

Which Honeywell wireless wiring module works with the THX9000 series when only four wires are available?

The THP9045A1023 is designed for THX9000 thermostats and adds the missing fifth connection — typically the common wire — using the existing four-wire run.

What does the module actually do once it is wired into the thermostat?

It creates a virtual common (C) connection so the thermostat receives continuous power without running a new wire from the equipment.

What wiring standard or interface does the module use to communicate with the thermostat?

It connects to the thermostat’s Rc, K, W-O/B, Y, G and C terminals and uses Honeywell’s proprietary wireless link to the equipment interface module.

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