Brand: Honeywell
Category: Security System
Document Type: Installation Guide
Language: EN
Installation Guide for 7845GSM/7845GSMCN
Uploaded: Nov. 21, 2025, 6:42 p.m.
Manual Publish Date: 2006-11-01
Warranty Information
Honeywell warrants the 7845GSM/7845GSMCN for 24 months against defects in materials and workmanship under normal use.
System Overview
The 7845GSM/7845GSMCN Digital Cellular Communicator (7845GSM) is a state-of-the-art communication device for security systems. It transmits alarm reports and enables upload/download capabilities for compatible Honeywell control panels via the AlarmNet-G network, utilizing GSM technology. If the GPRS network is unavailable, it can send transmissions via SMS. The device offers quick connection to Honeywell control panels, simple programming via a 7720P tool, and reporting of fire, burglary, and status messages.
Modes of Operation
The 7845GSM supports four modes:
- ECP Mode: For Honeywell controls supporting LRR-ECP communication. Connects to keypad terminals for 2-way ECP communication.
- Zone Trigger Mode: For controls not supporting LRR-ECP or 4204 Relay Modules. Provides six input zones configurable for various trigger types.
- 4204 Mode: For controls not supporting LRR-ECP but supporting 4204 Relay Modules. Acts as a 4204 Relay Module.
- Two-4204 Mode: Similar to 4204 mode but supports up to eight zone inputs, acting as two 4204 modules.
Module Supervision
The 7845GSM provides network communication failure monitoring, communication path failure detection, and a fault output terminal for module fault conditions. It also monitors for power loss, low battery, and cover tamper conditions.
Troubleshooting and error codes
| STATUS CODE | DESCRIPTION |
|---|---|
| 0000 | Control panel lost communication with 7845GSM. |
| 0880 | 7845GSM tamper detected (cover removed). |
| 0005 | 7845GSM has lost contact with AlarmNet-G network. |
| 000F | 7845GSM is not registered; account not activated. |
| 0019 | 7845GSM shutdown. |
| 0400 | 7845GSM power-on reset AND the control panel lost communications with 7845GSM. |
| 0C80 | 7845GSM power on reset AND tamper detected. |
| 0C8F | 7845GSM power on reset AND tamper detected AND not registered. |
| 08E0 | 7845GSM tamper detected and 7845GSM battery low. |
| 3000 | Primary power loss (will only be displayed in conjunction with another event). |
| 8000 | Battery charger failure (will only be displayed in conjunction with another event). |
| 0060 | Low battery (will only be displayed in conjunction with another event). |