Bosch FLM-420-12 Interface Input Modules
Product Overview and Technical Specifications
Key Features
- Line monitoring with end-of-line resistor
- Dry contact monitoring
- Voltage monitoring
- Individual monitoring of two inputs
- LSN ring fault tolerance with two internal isolators
System Overview
The FLM-420-12 interface input modules are designed to control up to two inputs. They function as 2-wire addressable LSN elements, connecting to the LSN security network and offering enhanced system parameters. These modules are crucial components in fire alarm systems, ensuring reliable detection and communication.
Diagram Description: The system overview diagram illustrates the FLM-420-12 module connected to a fire alarm system loop. It shows the module with its terminals for LSN connection (b1+, b2+), input connections (IN1+, IN1-, IN2+, IN2-), power supply, and shield. The LSN connection is depicted as a loop, highlighting the module's role within the network.
Technical Specifications
Electrical Characteristics
| Parameter | Specification |
|---|---|
| LSN Voltage | 15 V to 33 V DC |
| Max. LSN Line Current | 10.4 mA |
| Inputs | 2, independent |
| End-of-line Resistance | 3.9 kΩ nominal |
| Line Resistance States | Normal: 1500-6000 Ω Break: > 12,000 Ω Short Circuit: < 800 Ω |
| Dry Contact Monitoring Current | 8 mA |
| Voltage Monitoring Range | 0 V DC to 30 V DC |
| Input Resistance | ≥ 50 kΩ |
| Voltage Thresholds | 0.8 V, 3.3 V, 10.2 V, 21.2 V DC (± 0.3 V or ± 0.5 V) |
Mechanical Characteristics
| Parameter | Specification |
|---|---|
| Connections | Terminal blocks (14 for E/W, 7 for D) |
| Wire Cross-Section | 0.6 mm² to 2.0 mm² (E/W) 0.6 mm² to 3.3 mm² (D) |
| Address Setting | DIP switches (E/W), Rotary switches (D) |
| Housing Material | ABS/PC (E/W), PPO (D) |
| Color | White, RAL 9003 (E/W) White, similar to RAL 9002 (D) |
Dimensions
| Model | Dimensions (approx.) |
|---|---|
| FLM-420-12-E | 50 mm x 22 mm (Ø x H) |
| FLM-420-12-W | 76 mm x 30 mm (Ø x H) |
| FLM-420-12-D | 110 mm x 110 mm x 48 mm (W x H x D) |
Weight
| Model | Weight (with/without packaging) |
|---|---|
| FLM-420-12-E | 35 g / 130 g |
| FLM-420-12-W | 55 g / 155 g |
| FLM-420-12-D | 150 g / 235 g |
Environmental Conditions
| Parameter | Specification |
|---|---|
| Operating Temperature | -20 °C to +65 °C |
| Storage Temperature | -25 °C to +80 °C |
| Relative Humidity | < 96% (non-condensing) |
| Equipment Class (IEC 60950) | Class III |
| Protection Class (IEC 60529) | IP 30 |
System Limits
| Parameter | Specification |
|---|---|
| Max. Cable Length per Input | 3 m |
Product Variants
The FLM-420-12 series is available in three main variants:
- FLM-420-12-E: Flush-mount interface input module with 2 monitored inputs, suitable for standard enclosures (e.g., switch programs). Requires an enclosure depth of at least 60 mm.
- FLM-420-12-W: Wall-mount interface input module with 2 monitored inputs, designed for surface mounting, either directly or using the FLM-IFB126-S enclosure.
- FLM-420-12-D: DIN-rail mount interface input module with 2 monitored inputs, designed for installation on standard DIN rails (EN 60715) or within the FLM-IFB126-S enclosure.
Models -E and -W also support loop-through connection for additional LSN power supply.
Certifications and Compliance
The FLM-420-12 modules comply with the following standards and have received relevant certifications:
- EN 54-17:2005
- EN 54-18:2005
- VdS (e.g., G 207076)
- CE
- CPD (e.g., 0786-CPD-20288)
- MOE (e.g., UA1.016-0070269-11)
Installation and Configuration Notes
- Modules can be connected to Bosch fire alarm panels such as FPA-5000 and FPA-1200.
- Address setting is performed using DIP switches (for -E/-W models) or rotary switches (for -D models), or via panel software.
- The LSN improved technology supports flexible network architectures, including T-type branches, without additional components.
- The maximum cable length for each input is 3 meters.
Ordering Information
| Product Code | Description |
|---|---|
| FLM-420-12-E | Interface input module, flush-mount |
| FLM-420-12-W | Interface input module, wall-mount (with cover and accessories) |
| FLM-420-12-D | Interface input module, DIN-rail mount (with adapter and fiber optic) |
Accessories
- FLM-IFB126-S: Enclosure for surface mounting, for use as a holder for the 420 series interface modules for DIN-rail mounting (-D) or surface mounting (-S).
- FMX-IFB55-S: Surface mount enclosure for wall-mount 420 series interface modules.
Contact Information
For inquiries in Russia:
Robert Bosch OOO Security Systems
13/5, Akad. Korolyova str.
129515 Moscow, Russia
Phone: +7 495 937 5361
Fax: +7 495 937 5363
Email: Info.bss@ru.bosch.com, ru.securitysystems@bosch.com
Website: www.bosch.ru
