Bosch LSN 1500 A LSN Bus Module 1500mA – Addressable Fire Alarm System Module
The Bosch LSN 1500 A is an addressable fire alarm system bus module supporting up to 254 LSN improved elements and a maximum line current of 1500 mA. It offers flexible loop, stub, and T-tap network structures, line lengths up to 3000 m, and auxiliary power connections for compatible Bosch fire detection systems.
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Bosch LSN 1500 A LSN Bus Module 1500mA – Addressable Fire Alarm System Module
The Bosch LSN 1500 A is a high-capacity LSN bus module designed for connecting addressable fire alarm devices to compatible Bosch fire detection systems. It supports up to 254 LSN improved elements with a maximum line current of 1500 mA, or up to 127 classic LSN elements with a maximum line current of 300 mA.
The module provides flexible network structures, including loop, stub, and T-tap configurations, making it suitable for fire alarm installations requiring reliable addressable device connectivity and auxiliary power distribution.
Key features
- Up to 254 LSN improved elements.
- Maximum line current of 1500 mA for LSN improved devices.
- Supports up to 127 classic LSN elements.
- Line length up to 3000 m, depending on configuration and cable type.
- Unshielded cable can be used.
- Flexible loop, stub, and T-tap network structures.
- LSN improved and classic automatic addressing, plus manual address assignment.
- Two auxiliary power supply connections.
- Red alarm and yellow fault LED indicators.
- Compatible with PRD 0004 A panel rail installation.
High-capacity addressable fire alarm connectivity
The LSN 1500 A allows the connection of an LSN loop with up to 254 LSN improved elements. It also supports classic LSN devices with a maximum of 127 elements and a maximum line current of 300 mA.
The module provides LSN and auxiliary power connections for compatible fire alarm system devices.
Flexible network configuration
The module supports loop, stub, and T-tap network structures. The maximum line length is up to 3000 m, depending on the system configuration and cable type.
For fire detection systems operating according to EN 54-13, every stub and T-tap must be terminated with the appropriate end-of-line modules.
Bosch LSN 1500 A Installation and configuration
The LSN 1500 A can only be plugged into the left side of a PRD 0004 A panel rail and requires two slots. Current consumption of connected devices and cable length can be calculated using the Bosch Safety Systems Designer (SSD).
Country-specific standards and guidelines must be considered during planning.
Applications
The Bosch LSN 1500 A is suitable for compatible addressable fire alarm systems requiring high-capacity LSN device connectivity, flexible network structures, and auxiliary power connections.
Manufacturer: Bosch Security Systems
Model: LSN 1500 A
Product type: LSN bus module, 1500 mA
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Product Overview
Product Name: Bosch LSN 1500 A – 1500mA LSN Bus Module for Addressable Fire Alarm Systems
Manufacturer: Bosch Security Systems
Model: LSN 1500 A
Product Type: LSN Improved Bus Module
Rated Line Current: 1500mA (Alarm)
Key Features
- Supports up to 254 LSN improved elements.
- Supports up to 127 classic LSN elements.
- Maximum LSN line length up to 3000 metres, depending on cable type and configuration.
- Maximum LSN line current of 1500mA in alarm condition.
- Flexible network configurations: Loop, Stub and T-tap.
- Supports unshielded cables.
- LSN improved automatic addressing, classic automatic addressing and manual address assignment.
- Additional voltage output with ERT capability.
- Integrated alarm and fault LED indicators.
Electrical Specifications
| Parameter | Specification |
|---|---|
| Input Voltage | 20–30 V DC / 5 V DC ±5% |
| LSN Output Voltage | 30 V DC ±0.85 V |
| Auxiliary Output Voltage | 28 V DC ±1.0 V |
| Maximum Current Consumption | 4010mA at 24 V DC |
| Nominal Module Current | 260mA at 24 V DC |
| LSN Current Consumption | 1.7 × Current consumption of LSN elements |
| AUX Current Consumption | 1.2 × Auxiliary power |
| LSN Standby Current | Maximum 750mA |
| LSN Alarm Current | Maximum 1500mA |
| Classic LSN Line Current | Maximum 300mA |
| AUX Power – Loop (ERT System) | Maximum 500mA at 28 V DC |
| AUX Power – Two Stubs | 2 × Maximum 500mA at 28 V DC |
System Specifications
| Parameter | Specification |
|---|---|
| LSN Improved Elements | Maximum 254 |
| Classic LSN Elements | Maximum 127 |
| Maximum Line Length | 3000 metres |
| Network Structure | Loop, Stub, T-tap |
| Addressing | Automatic and Manual |
| Cable Type | Shielded or Unshielded |
| ERT Support | Yes |
| Module Installation | Left side of PRD 0004 A panel rail |
| Required Panel Slots | 2 Slots |
Mechanical Specifications
| Parameter | Specification |
|---|---|
| Housing Material | ABS Plastic (UL94 V-0) |
| Housing Colour | Anthracite, RAL 7016 |
| Dimensions (H × W × D) | Approx. 127 × 190 × 60 mm |
| Weight | Approx. 440 g |
| Alarm Indicator | Red LED |
| Fault Indicator | Yellow LED |
| Test Function | LED Test Button |
Environmental Specifications
| Parameter | Specification |
|---|---|
| Operating Temperature | -5°C to +50°C |
| Storage Temperature | -20°C to +60°C |
| Relative Humidity | Up to 95%, non-condensing |
| Protection Rating | IP30 (IEC 60529) |
Installation and Configuration
- The LSN 1500 A module requires two panel rail slots.
- The module must be installed on the left side of the PRD 0004 A panel rail.
- LSN device current consumption and cable length can be calculated using Bosch Fire System Designer (FSD).
- EOL modules are required for stubs and T-taps when complying with EN 54-13.
- AUX2 return wiring in loop configurations is restricted to compatible ERT systems.
- Maximum loop current and cable length depend on the selected system configuration and cable characteristics.
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