1. Introduction
This manual provides essential information for the proper installation, operation, and maintenance of the Notifier LEM-320 Loop Expander Module. The LEM-320 is designed to expand the capacity of compatible fire alarm control panels by providing additional Signaling Line Circuits (SLCs).
2. Consignes de sécurité
Always observe the following safety precautions during installation, operation, and maintenance of the LEM-320 module:
- L'installation doit être effectuée par un personnel qualifié, conformément à toutes les normes électriques locales et nationales.
- Disconnect all power sources before installing or servicing the module.
- Manipulez les composants électroniques avec précaution pour éviter les dommages causés par les décharges électrostatiques (ESD).
- Assurez-vous d'une bonne mise à la terre pour éviter les risques électriques.
- Refer to the main fire alarm control panel manual for system-specific safety instructions.
3. Produit terminéview
The Notifier LEM-320 is a Loop Expander Module designed to interface with a compatible Loop Control Module (LCM-320) to extend the system's capacity for addressable devices. It functions as a daughter board, providing additional even-numbered Signaling Line Circuits (SLCs) to the fire alarm control panel.

Figure 3.1 : Haut view of the Notifier LEM-320 Loop Expander Module, showing various integrated circuits and components.

Figure 3.2 : Incliné view of the Notifier LEM-320 module, highlighting the component layout and connection points.

Figure 3.3 : Bas view of the Notifier LEM-320 module, showing the circuit board traces and mounting points.
4. Installation
The LEM-320 module is designed to be mounted as a daughter board onto a compatible Notifier LCM-320 Loop Control Module. Follow these steps for proper installation:
- Préparation: Ensure all power to the fire alarm control panel is disconnected. Refer to the LCM-320 manual for specific power-down procedures.
- Localiser la position de montage : Identify the designated mounting headers on the LCM-320 board for the LEM-320 daughter board.
- Module Alignement : Carefully align the connectors on the LEM-320 with the corresponding headers on the LCM-320. Ensure correct orientation to prevent damage.
- Module sécurisé : Gently press the LEM-320 into place until it is firmly seated. Use any provided standoffs or screws to secure the module to the LCM-320, if applicable.
- Vérifiez les connexions : Double-check that all connections are secure and that the module is properly seated.
- Mise sous tension : Restore power to the fire alarm control panel according to the manufacturer's instructions.
- Configuration du système: Configure the fire alarm control panel to recognize the newly installed LEM-320 module and its associated SLCs. Refer to the control panel's programming manual for detailed instructions.
Note: Improper installation can lead to system malfunction or damage. Always consult the specific documentation for the LCM-320 and the main fire alarm control panel.
5. Fonctionnement
The Notifier LEM-320 Loop Expander Module operates as an integral part of the fire alarm control panel system. Once properly installed and configured with the LCM-320, it extends the system's capacity by providing additional Signaling Line Circuits (SLCs).
- SLC Expansion: The LEM-320 enables the connection of more addressable fire alarm devices (e.g., smoke detectors, heat detectors, manual pull stations, monitor modules) to the system.
- Communication: It facilitates communication between the connected SLC devices and the main fire alarm control panel via the LCM-320.
- Intégration du système : The module's operation is fully integrated with the control panel's software, allowing for centralized monitoring and control of all connected devices.
No direct user interaction is typically required with the LEM-320 module itself after initial installation and system configuration. Its function is to provide the necessary hardware expansion for the fire alarm system.
6. Entretien
The Notifier LEM-320 module is designed for reliable, long-term operation with minimal maintenance. However, periodic inspection and adherence to general electronic component care practices are recommended:
- Inspection visuelle : Periodically inspect the module for any signs of physical damage, loose connections, or excessive dust accumulation.
- Nettoyage: If necessary, gently clean the module using a soft, dry, lint-free cloth. Avoid using liquids or abrasive cleaners. Ensure power is disconnected before cleaning.
- Conditions environnementales : Ensure the module operates within the specified environmental conditions (temperature, humidity) of the fire alarm control panel enclosure.
- Test du système : Regular testing of the entire fire alarm system, including all connected SLC devices, should be performed by qualified technicians as per local codes and manufacturer guidelines.
Prudence: Do not attempt to repair the module yourself. Refer all servicing to qualified Notifier service personnel.
7. Dépannage
If the fire alarm system experiences issues related to SLC communication or device recognition after the LEM-320 installation, consider the following troubleshooting steps:
- Vérification de l'alimentation : Verify that the fire alarm control panel has stable power and that the LCM-320 is powered correctly.
- Sièges modulaires : Ensure the LEM-320 is securely seated on the LCM-320's connectors. Re-seat the module if necessary (with power disconnected).
- Intégrité du câblage : Check the wiring of all SLC devices connected to the expanded loops for shorts, opens, or incorrect connections.
- Configuration du système: Confirm that the fire alarm control panel's programming correctly recognizes the LEM-320 and the expanded SLCs. Verify device addressing.
- Indicateurs LED : Observe any diagnostic LEDs on the LCM-320 or the main control panel for error codes or status indications. Refer to the respective manuals for interpretation.
- Consultez les manuels : Always refer to the specific troubleshooting sections of the LCM-320 manual and the main fire alarm control panel manual for detailed diagnostic procedures.
If issues persist, contact Notifier technical support or a certified fire alarm technician.
8. Spécifications
| Fonctionnalité | Détail |
|---|---|
| Numéro de modèle | LEM-320 (Part Number: NLEM320) |
| Fabricant | NOTIFIER |
| Fonction | Loop Expander Module for LCM-320 |
| Montage | Daughter board to LCM-320 |
| Poids de l'article | 2 livres |
| Piles requises | Non |
| Piles incluses | Non |
| Quantité du paquet | 1 |
9. Garantie et assistance
For warranty information regarding the Notifier LEM-320 Loop Expander Module, please refer to the official Notifier warranty statement provided with your product or available on the Notifier website. Les conditions de garantie couvrent généralement les défauts de matériaux et de fabrication dans des conditions normales d'utilisation.
For technical support, service, or to report issues, please contact your authorized Notifier distributor or Notifier technical support directly. Ensure you have your product model number (LEM-320) and any relevant system information ready when contacting support.
Notifier Contact Information:
Please visit the official Notifier website contenant les coordonnées et les ressources d'assistance les plus récentes. www.notifier.com





