Description
Core Product Summary (Brand / Model / Key Attributes)
The ESSER FX808331 is a loop card module designed for the FlexES Control fire alarm control panel system. It provides the interface for one esserbus or esserbus-PLus loop and supports mixed operation of both protocols within the same panel.
The module accommodates up to 127 devices per loop, including IQ8Quad intelligent detectors, manual call points, Series 9200 detectors, esserbus transponders, and loop-powered signaling devices. Maximum loop length is 3.5 km. It features integrated line isolators, continuous monitoring for short circuit and open circuit, LED status indicators, and support for wireless components. The unit operates at 24 V DC with a quiescent current of approximately 17 mA and is supplied in a plastic protective housing.
Key Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Loop card / esserbus / esserbus-PLus module |
| Model / Part Number | FX808331 |
| Manufacturer | ESSER by Honeywell (Novar) |
| System Compatibility | FlexES Control fire alarm panels |
| Loop Type | esserbus / esserbus-PLus (mixed operation possible) |
| Maximum Devices per Loop | 127 |
| Maximum Loop Length | 3.5 km |
| Operating Voltage | 24 V DC |
| Quiescent Current | approx. 17 mA |
| Dimensions (W × H × D) | 27 × 93 × 112 mm |
| Weight | approx. 110 g |
| Approvals | VdS, FM |
Detailed Product Overview
The ESSER FX808331 is a plug-in loop module for the FlexES Control series of addressable fire alarm control panels. It connects a single esserbus or esserbus-PLus loop to the panel and enables communication with field devices such as intelligent fire detectors, manual call points, input/output transponders, and loop-powered alarm signaling devices.
Each module supports a maximum of 127 devices and a loop length of up to 3.5 km. The module continuously monitors the loop for short circuits, wire breaks, and other faults. Integrated isolators provide two-way line protection, allowing rapid isolation of a faulted section while maintaining operation of the remaining devices. Bus-powered signaling devices can be reactivated quickly after a short circuit in compliance with EN 54-13 requirements.
The FX808331 is housed in a plastic protective enclosure with LED indicators for quick visual status assessment. Modules are mechanically locked into the panel slots without screws and support hot-plugging with automatic recognition. Up to four non-galvanically isolated modules may be installed in one panel; from the fifth module onward, galvanically isolated versions are required. Mixed use of isolated and non-isolated modules within the same panel is permitted.
The module is intended for professional fire detection systems in commercial, industrial, and institutional buildings where reliable loop communication and system expandability are required.
Engineering Selection Highlights
- Supports both esserbus and esserbus-PLus protocols → flexible use of existing and new field devices.
- Up to 127 devices per loop → high capacity for medium-to-large detection zones.
- Loop length up to 3.5 km → suitable for extensive building layouts.
- Integrated isolators → automatic short-circuit isolation for continued system operation.
- Continuous loop monitoring → detects short circuits, open circuits, and disturbances.
- Hot-pluggable with automatic recognition → simplifies installation and maintenance.
- LED status indicators → rapid visual diagnostics.
- Compatible with IQ8Quad, Series 9200, transponders, and loop-powered devices → broad device ecosystem support.
FX808331
FX808331
Dimensions, Mounting & Connection Notes
- Dimensions: 27 mm (W) × 93 mm (H) × 112 mm (D)
- Weight: approximately 110 g
- Housing: Plastic protective enclosure with LED indicators
- Mounting: Plug-in module for FlexES Control panel slots (mechanical lock, no screws)
- Connection: Loop terminals for esserbus / esserbus-PLus wiring
Exact wiring details, addressing rules, and configuration procedures are defined in the official ESSER FlexES Control system documentation.
System Compatibility & Integration Requirements
| Item / Dependency | Verified Compatibility or Requirement | Practical Note |
|---|---|---|
| Host Panel | FlexES Control series | Installs in available module slots |
| Loop Protocol | esserbus / esserbus-PLus | Mixed operation supported within one panel |
| Maximum Modules (non-GI) | 4 per panel | Galvanically isolated modules required from the 5th onward |
| Field Devices | IQ8Quad, Series 9200, MCPs, transponders, loop-powered signaling devices | Max. 127 devices per loop |
| Wireless Components | Supported | Via compatible ESSER wireless interfaces |
| Power | 24 V DC from panel | Quiescent current approx. 17 mA |
| Mounting | Panel module slot (mechanical lock, no screws) | Hot-pluggable |
FAQ
What is the ESSER FX808331?
It is a loop card module for FlexES Control fire alarm panels that interfaces one esserbus or esserbus-PLus loop.
How many devices can be connected to one module?
A maximum of 127 devices per loop.
What is the maximum loop length?
Up to 3.5 km.
Does it support both esserbus and esserbus-PLus?
Yes. Mixed operation of both protocols is possible within the same panel.
Are galvanically isolated modules required?
Up to four non-isolated modules (FX808331) may be used per panel. From the fifth module onward, galvanically isolated versions are required.
What approvals does the module carry?
VdS and FM approvals are listed for the product.
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