Honeywell FS-DCOM-232/485 – Dual Serial Interface Module | FS Series Fire Alarm Platform
Engineering Background: The Honeywell FS-DCOM-232/485 is a dedicated serial communication interface module engineered for integration within Honeywell’s FS Series intelligent fire alarm control panel ecosystem. Designed to bridge the gap between legacy serial protocols and modern building automation networks, this module provides simultaneous RS-232 and RS-485 communication ports, enabling reliable data exchange between the fire alarm control panel (FACP) and third-party systems such as BMS, SCADA, and proprietary monitoring platforms.
Product Positioning: Purpose-built for procurement engineers and system integrators who require a certified, drop-in communication expansion module for Honeywell FS Series panels. The FS-DCOM-232/485 eliminates the need for external protocol converters, reduces wiring complexity, and ensures UL-listed system integrity is maintained throughout the installation.
Complete Technical Specifications
- Part Number / SKU: FS-DCOM-232/485
- Manufacturer: Honeywell Life Safety (Notifier / Fire-Lite compatible platform)
- Module Type: Dual Serial Communication Interface Module
- Communication Ports: RS-232 (DB9 connector) + RS-485 (terminal block)
- RS-232 Baud Rate: 300 – 115,200 bps (configurable)
- RS-485 Baud Rate: 300 – 115,200 bps (configurable)
- RS-485 Bus Length: Up to 1,200 m (4,000 ft) at 9,600 bps
- RS-485 Topology: Multi-drop, up to 32 nodes per segment
- Operating Voltage: Powered via FS Series panel backplane (3.3 V / 5 V logic)
- Operating Temperature: 0°C to +49°C (32°F to 120°F)
- Relative Humidity: 10% – 93% non-condensing
- Dimensions: Standard FS Series plug-in module form factor
- Weight: Approx. 300 g
- Certifications: UL Listed, cUL Listed, CE Marked
- Compatible Panels: Honeywell FS Series FACP (FS-250, FS-250E, and compatible variants)
- Country of Origin: USA / Mexico (Honeywell Life Safety manufacturing)
Proven Application Environments
- Commercial High-Rise Buildings: Integration of FS Series FACP with BMS (Building Management Systems) via RS-485 Modbus RTU for centralized monitoring.
- Industrial Facilities: SCADA system connectivity for real-time fire alarm status reporting over RS-232 serial links to control room HMIs.
- Healthcare & Data Centers: Redundant serial communication paths ensuring continuous alarm reporting to facility management platforms with zero single-point-of-failure risk.
- Campus & Multi-Building Installations: RS-485 multi-drop topology connecting multiple FS Series panels across extended cable runs up to 1,200 m.
- Transportation Hubs & Airports: Protocol bridging between Honeywell FS panels and third-party emergency notification systems via configurable baud rate serial links.
Engineering Advantages
- Dual-Port Architecture: Simultaneous RS-232 and RS-485 operation eliminates the need for external serial converters, reducing BOM cost and installation complexity.
- Wide Baud Rate Range: 300 to 115,200 bps configurability ensures compatibility with legacy and modern serial devices without hardware changes.
- Long-Distance RS-485 Capability: 1,200 m bus length supports large campus deployments without signal repeaters in most configurations.
- UL Listed System Integrity: Module is UL Listed as part of the FS Series system, preserving the panel’s listed status — critical for AHJ (Authority Having Jurisdiction) approvals.
- Plug-In Module Design: Tool-free installation into the FS Series panel backplane slot minimizes commissioning time and reduces field labor costs.
- Isolated RS-485 Bus: Electrical isolation protects the FACP from ground loops and transient voltages common in industrial environments.
System Architecture & Signal Flow
The FS-DCOM-232/485 installs directly into a dedicated communication module slot on the Honeywell FS Series FACP backplane. Once seated, the module draws power from the panel’s internal bus and exposes two independent serial ports on the front panel:
- Port 1 (RS-232): Connects to a local PC, printer, or HMI terminal for direct panel programming, event logging, or status display. Maximum cable length: 15 m (50 ft).
- Port 2 (RS-485): Connects to a BMS gateway, SCADA RTU, or remote monitoring system over a twisted-pair cable run. Supports Modbus RTU and proprietary Honeywell serial protocols depending on panel firmware configuration.
Both ports operate independently and simultaneously. Panel firmware manages port arbitration, ensuring alarm events are transmitted on both interfaces without data collision or priority conflict.
Sourcing & Quality Verification
- Source: Konmask.com sources the FS-DCOM-232/485 exclusively from authorized Honeywell Life Safety distributors and verified secondary market channels with full traceability documentation.
- Inspection Protocol: Each unit undergoes visual inspection, label verification (Honeywell part number, date code, country of origin), and connector integrity check prior to shipment.
- Authenticity Guarantee: Counterfeit-free guarantee backed by supplier chain documentation. Suspect units are quarantined and returned — never shipped.
- Condition: New (factory-sealed) and Refurbished (tested, cleaned, re-certified) options available. Condition clearly stated at time of order confirmation.
- Warranty: 12-month replacement warranty against manufacturing defects and DOA (Dead on Arrival) units.
Procurement Process
- Confirm Compatibility: Verify your FS Series panel model and firmware version supports the FS-DCOM-232/485 module slot. Refer to the FS Series Installation Manual (Document P/N: 52729) for slot assignments.
- Request a Quote: Contact support@konmask.com for volume pricing, lead time confirmation, and export documentation (if applicable).
- Place Order: Orders accepted via Konmask.com checkout, bank transfer (T/T), or purchase order (PO) for qualified accounts.
- Shipping: Standard lead time: 1–3 business days from verified stock. Express DHL/FedEx international shipping available. Export-controlled items shipped with full customs documentation.
- Receiving Inspection: Inspect packaging integrity and part number label upon receipt. Report any discrepancies within 48 hours of delivery.
Technical FAQ
Q: Can the FS-DCOM-232/485 be used with panels outside the Honeywell FS Series?
A: No. The module is designed exclusively for the Honeywell FS Series FACP backplane. It is not compatible with Notifier NFS2-3030, Fire-Lite MS-9600, or other panel families without a dedicated adapter — which does not exist for this module.
Q: Does the module support Modbus TCP/IP or only serial Modbus RTU?
A: The FS-DCOM-232/485 supports serial Modbus RTU over RS-485 only. For Modbus TCP/IP, a separate Ethernet gateway module (e.g., FS-ECOM) is required.
Q: What is the maximum number of FS-DCOM-232/485 modules per panel?
A: Typically one module per panel, occupying a single communication expansion slot. Refer to your specific FS Series panel documentation for slot availability.
Q: Is firmware configuration required after installation?
A: Yes. The panel must be programmed via the FS Series configuration software to enable and assign the communication ports. Baud rate, protocol, and port function are all software-configurable.
Q: Can I use both RS-232 and RS-485 ports simultaneously?
A: Yes. Both ports operate independently and simultaneously, allowing concurrent connection to a local terminal (RS-232) and a remote BMS or SCADA system (RS-485).
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