Honeywell Home 7939WG-GY - Surface Mount Magnetic Contact with Terminals, Gray Compatible Systems & Integrations

5800 Series contact — compact 345 MHz one-way wireless door/window sensor (5800MINI, 5816, recessed variants) for VISTA with receiver, Lynx, and compatible panels. On Honeywell systems, wireless devices are supervis...

Overview

5800 Series contact — compact 345 MHz one-way wireless door/window sensor (5800MINI, 5816, recessed variants) for VISTA with receiver, Lynx, and compatible panels.

On Honeywell systems, wireless devices are supervised zones on the panel — tamper, low battery, and missing signals appear as trouble conditions that may block arming depending on panel programming.

At a Glance

SpecificationDetails
DetectionOpen/close magnetic contact
Wireless345 MHz one-way 5800 Series
PowerCR2032 or listed battery — verify SKU
SupervisionPanel zone trouble — low battery, tamper, missing

What This Device Does Well

Provides reliable supervised status at the panel and Total Connect 2.0 when installed, enrolled, and range-tested correctly.

Before You Service or Replace One

  • Sensor SKU5800 Series one-way vs SiX two-way encrypted vs hardwired.
  • Panel online — resolve panel AC/cell trouble before blaming sensor.
  • Range5800RP repeater or move 5881EN/6160RF receiver path for distant zones.
  • Battery type — use listed cell; replace all batteries in multi-cell devices.
  • Tamper — cover fully closed before declaring hardware fault.

Official Sources

Use official Resideo install PDFs and install guides for exact wiring, enrollment, and firmware — specifications vary by SKU and region.

Compatible Peripherals

This page lists Honeywell Home ecosystem compatibility — panels, transceivers, repeaters, and monitoring platforms — not third-party panel brands unless using an approved takeover path.

Host compatibility

Host / ecosystemHow it connects
VISTA + 5881EN receiver5800 enrollment
6160RF keypad receiver5800 enrollment
Lynx built-in receiver5800 enrollment

Not compatible / common mistakes

Using Honeywell wireless devices without a compatible 5800 receiver or SiX/ProSeries/Lyric host panel.

Replacement guidance

  • Match SKU and encryption generation on product label before ordering.
  • Delete old zone/device in installer programming before enrolling replacement.
  • Document zone number and name for user and central station records.
  • Run walk test and communication test after swap on monitored accounts.

Source: 5800 Series contact install guide (Resideo official documentation).