2GIG 345S Wireless Door/Window Contact Sensor Installation Notes

2GIG door/window contact — magnetic reed sensor reporting open/close on 345 MHz (standard or eSeries encrypted thin/recessed/outdoor variants).

On 2GIG 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

What This Device Does Well

Provides reliable supervised status at the panel and Alarm.com when installed, enrolled, and range-tested correctly.

Before You Service or Replace One

• Sensor SKU — standard 345 MHz vs eSeries encrypted vs ePlus 900 MHz.
• Panel online — resolve panel AC/cell trouble before blaming sensor.
• Range — repeaters (RPTR1) or transceivers (XCVR2) 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

• 2GIG product page
• 2GIG Full Catalog English
• 10023748a x3 installandprogrammingguide
• 2GIG Edge Smart Home Manual 1
• 2GIG Edge User Guide 1
• 2GIG GC2 User Guide
• 2GIG GC2 User Guide FR
• 2GIG GC2 User Guide PO
• 2GIG GC2 User Guide SP
• 2GIG GC2 User Guide TU

Use official 2GIG PDFs and install guides for exact wiring, enrollment, and firmware — specifications vary by SKU and region.

Follow 2GIG contact sensor install guide and the official resource links in this product folder for mounting, wiring, and enrollment.

Pre-install checklist

• Confirm panel model (GC2/GC3/Edge) and encryption requirements.
• Verify dealer cell account and module SKU before cell install.
• Document installer code and existing zone map for takeover jobs.
• Plan antenna routing (ANT5XL) when panel location has poor cell RSSI.
• Have listed batteries and tools for sensor mounts before enrollment.

Typical install sequence

1. Mount and power panel; apply firmware updates per dealer bulletin.
2. Install cell module and run communication test / Alarm.com activation.
3. Enroll wireless sensors via installer Learn mode; label zones.
4. Include Z-Wave devices after excluding from any prior hub.
5. Install transceiver/repeater hardware before distant ePlus or fringe sensors.
6. Run walk test, user code training, and central station test if monitored.

Contact alignment

• Gap between sensor and magnet must be within spec — too wide reads open.
• Use spacers on uneven trim; verify tamper clears when cover closed.
• For encrypted DW10e/DW20e, enroll on panel with encryption support enabled.

Power and connectivity reference

Source: 2GIG contact sensor install guide (2GIG official documentation).