ALU Loop Unit

FW2321 - Fire Alarm Loop Expansion Module

Intelligent Loop Expansion • Device Integration • System Scalability

LOOP EXPANSION MODULE
Component

ALU Loop Unit

FW2321

Intelligent
Loop Expansion
Quality Tested
Easy Install

The FW2321 ALU Loop Unit provides intelligent loop expansion capabilities for Maple Armor fire alarm systems. It enables system scalability and supports additional detection devices on existing fire alarm loops.

Technical Specifications

Model NumberFW2321
Product NameALU Loop Unit
CategoryLoop Expansion Module
CertificationComponent Rated
ManufacturerMaple Armor / Tongfang
Warranty2-Year Standard
Loop CapacityExpands by 32 Addressable Devices
Communication ProtocolProprietary ALU Protocol
Data Rate9600 bps
Power Supply24VDC @ 250mA
Power ConsumptionStandby: 50mA, Active: 150mA
Operating Voltage18-30VDC
Operating Temperature-10°C to +55°C (14°F to 131°F)
Storage Temperature-20°C to +70°C (-4°F to 158°F)
Humidity10% to 93% RH (Non-condensing)
EnclosureMetal, DIN Rail or Panel Mount
Dimensions (HxWxD)4.5" x 6.5" x 2" (114 x 165 x 51mm)
Weight1.2 lbs (0.54 kg)

Product Overview

The FW2321 ALU (Alarm Loop Unit) is an intelligent loop expansion module designed to extend the capacity of Maple Armor fire alarm systems. It provides additional addressable device capacity without requiring major system upgrades.

Loop Expansion

Adds 32 addressable device capacity to existing fire alarm loops for system scalability.

Intelligent Operation

Advanced microprocessor control with real-time communication monitoring.

Easy Installation

Simple DIN rail or panel mounting with clear terminal connections.

System Integration

Seamless integration with Maple Armor FACP

Transparent to existing system operation

Automatic device recognition

Real-time communication status

Fault isolation capability

Power monitoring functions

Diagnostic reporting

Automatic configuration

Product Features

Expansion Capabilities
  • Adds 32 addressable devices per unit
  • Multiple units can be cascaded
  • Supports all Maple Armor devices
  • Hot-swappable design
  • Automatic addressing
Communication Features
  • Proprietary ALU communication protocol
  • 9600 bps data rate
  • Error detection and correction
  • Redundant communication paths
  • Real-time status reporting
Diagnostic Features
  • LED status indicators
  • Communication status monitoring
  • Power supply monitoring
  • Device count reporting
  • Fault isolation capability
Physical Features
  • Metal enclosure for EMI protection
  • DIN rail mounting (standard 35mm)
  • Panel mount option available
  • Screw terminal connections
  • Clear labeling and indicators
System Scalability: The FW2321 ALU Loop Unit enables cost-effective system expansion without replacing existing fire alarm control panels, making it ideal for building renovations and expansions.

Installation & Configuration

DIN Rail Mount
Standard 35mm DIN rail mounting
Panel Mount
Direct panel mounting option
Rack Mount
19" rack mounting available
Installation Guidelines
  • Mount in dry, protected location
  • Ensure proper ventilation
  • Follow local electrical codes
  • Use proper cable strain relief
  • Maintain minimum clearance around unit
Wiring Requirements
Power Wiring

18-16 AWG for 24VDC power. Separate power supply or FACP power.

Data Wiring

Shielded twisted pair for ALU communication (18-22 AWG).

Terminal Connections

Screw terminals with clamping plates for secure connections.

Configuration Steps
  1. Mount the ALU Loop Unit in desired location
  2. Connect power supply (24VDC)
  3. Connect data communication cables to FACP
  4. Connect expanded loop devices
  5. Power up and verify communication
  6. Configure through FACP programming

Compatibility & Applications

Compatible Systems
  • Maple Armor FW2000 Series
  • Maple Armor FW2100 Series
  • Maple Armor FW2200 Series
  • All Maple Armor FACP with ALU ports
Supported Devices
  • Addressable Smoke Detectors
  • Heat Detectors
  • Manual Call Points
  • Monitor Modules
  • Control Modules
Application Scenarios
Building Renovations

Add new detection zones during building upgrades without panel replacement.

System Expansion

Expand existing fire alarm systems for additional building areas.

Industrial Applications

Add specialized detectors in industrial environments with existing systems.

Benefits

Cost-Effective: Avoid complete system replacement

Time-Saving: Quick installation and configuration

Flexible: Multiple mounting options

Reliable: Industrial-grade construction

Scalable: Multiple units can be cascaded

Serviceable: Easy maintenance and troubleshooting