Honeywell FC-TSGAS-1624 Replacement for FC-TS Series

Product Overview

Honeywell FC-TSGAS-1624 Replacement for FC-TS Series: Seamless Transition & Upgrade Solution

The Honeywell FC-TSGAS-1624 is a 16-channel Gas & Flame Detector Input Module designed for the Honeywell FC-TS (Fire & Gas Safety Controller) Series, certified to SIL 2 under IEC 61508. As legacy FC-TS installations age and original modules approach end-of-life or become difficult to source, facilities managers and control engineers face the critical challenge of maintaining system integrity without triggering a full safety system overhaul. This page provides a complete migration and replacement guide for engineers transitioning from discontinued or aging FC-TSGAS-1624 units within existing Honeywell safety architectures.

Whether you are replacing a failed module in a live fire-and-gas detection loop, upgrading a brownfield plant’s safety instrumented system (SIS), or consolidating spare-parts inventory ahead of a scheduled turnaround, the FC-TSGAS-1624 offers a verified drop-in solution that preserves your existing wiring infrastructure, cabinet footprint, and SIL 2 certification status.

Compatibility Comparison Table

Seamless Upgrade Solutions

A successful FC-TSGAS-1624 migration rarely involves a single module swap. In practice, engineers replacing gas and flame detector input modules within an FC-TS safety controller cabinet must coordinate several interdependent components to maintain system availability and SIL 2 loop integrity.

The FC-TS backplane and chassis remain unchanged during this upgrade, which means the existing rack structure continues to host the replacement module without any mechanical rework. However, if the cabinet also contains aging FC-SDAI-0824 discrete analog input modules or FC-SDAO-0824 analog output modules, this is an ideal opportunity to audit those units simultaneously and replace any that show diagnostic faults or calibration drift.

On the power distribution side, the FC-PSCN-0001 power supply module feeds the FC-TS backplane at 24 VDC. Before inserting the FC-TSGAS-1624, verify that the power budget accommodates the additional 16-channel load — particularly if the cabinet was previously configured for an 8-channel variant. In most cases, the existing power module is sufficient, but a load calculation review is recommended during the pre-commissioning phase.

For facilities that use HART-enabled gas detectors — such as Honeywell Searchline Excel or Searchpoint Optima Plus — the FC-TSGAS-1624’s HART pass-through capability allows device diagnostics to be surfaced directly in the safety controller without additional signal conditioning hardware. This eliminates the need for standalone HART multiplexers or signal isolators that older installations sometimes required between the field device and the legacy input card.

Communication between the FC-TS safety controller and the plant DCS (e.g., a Honeywell Experion PKS or third-party SCADA system) typically passes through a dedicated FC-TS gateway or Modbus RTU/TCP interface module. This communication path is unaffected by the input module replacement, as the FC-TSGAS-1624 presents the same data objects to the controller CPU as its predecessor. Engineers using Honeywell FSC Safety Builder or ControlEdge Builder will find that existing function block configurations and I/O assignments can be retained with only minor channel-count adjustments in the project file.

If the retrofit scope extends to the field junction boxes, consider upgrading to IS (intrinsically safe) Zener barrier or galvanic isolator assemblies rated for SIL 2 loops. These components sit between the field detector and the FC-TSGAS-1624 input terminals and are critical for maintaining the overall SIL 2 claim of the safety instrumented function (SIF). Replacing aging barriers during the same maintenance window avoids a second outage later.

Finally, for sites that operate Honeywell HC900 hybrid controllers or ControlEdge PLC units alongside the FC-TS safety system, ensure that the cross-system data exchange (typically via OPC DA/UA or Modbus) is validated after the module replacement, as any change to the FC-TS I/O map may require a corresponding update to the data mapping table in the supervisory controller.

Retrofit Guidance FAQ

Q: Do I need to rewire field terminals when replacing an FC-TSGAS-0824 with the FC-TSGAS-1624?
A: No. The FC-TSGAS-1624 uses the same terminal block pinout as the FC-TS module family. Existing field cables connected to gas and flame detectors can remain in place. Only the module itself is swapped. Verify loop continuity with a loop calibrator before returning the system to service.

Q: Is the FC-TSGAS-1624 backward-compatible with older FC-TS firmware versions?
A: Compatibility depends on the FC-TS controller CPU firmware revision. Honeywell recommends verifying the minimum firmware version in the FC-TSGAS-1624 release notes. In most brownfield installations, a firmware update to the controller CPU is performed as part of the planned maintenance window before inserting the new module.

Q: Can I hot-swap the FC-TSGAS-1624 without shutting down the entire FC-TS system?
A: The FC-TS architecture supports module-level replacement under specific conditions defined in the system’s Safety Manual. Hot-swap capability depends on the redundancy configuration of the affected safety loop. For SIL 2 loops, a formal bypass and inhibit procedure must be followed per IEC 61511 requirements before removing the existing module. Consult your site’s Management of Change (MOC) procedure.

Q: Will my existing FSC Safety Builder project file work with the FC-TSGAS-1624?
A: Yes, with minor adjustments. The 16-channel variant exposes additional I/O addresses compared to the 8-channel predecessor. Existing channel assignments remain valid; the additional 8 channels appear as new I/O points in the project. No logic rewrite is required for the channels already in use.

Q: What communication protocols does the FC-TSGAS-1624 support for DCS integration?
A: The module communicates via the FC-TS internal proprietary bus to the controller CPU. DCS integration is handled at the controller level through Modbus RTU, Modbus TCP, or OPC interfaces — not at the individual module level. No changes to the DCS integration layer are required when replacing this module.

Q: How much physical space does the FC-TSGAS-1624 require in the control cabinet?
A: The FC-TSGAS-1624 occupies a single standard FC-TS module slot. Its form factor is identical to other FC-TS I/O modules, so no cabinet modifications, DIN rail extensions, or additional mounting hardware are needed.

Warranty Assurance

Every FC-TSGAS-1624 unit shipped by TOPNLMS is covered by a 12-month warranty from the date of delivery. Our pre-shipment testing protocol includes functional verification of all 16 input channels, HART communication validation, power consumption measurement, and visual inspection for physical integrity. Units that do not pass our outgoing quality check are not shipped.

In the event of a warranty claim, TOPNLMS provides a replacement unit or full refund within the warranty period. Our after-sales response target is within 24 hours for initial fault assessment. For critical safety system applications where downtime cost is high, we recommend maintaining at least one spare FC-TSGAS-1624 on-site — we can assist with consignment stock arrangements for qualified accounts.

All units are shipped with full documentation including test records, a certificate of conformity, and original manufacturer packaging where available. Export packaging is reinforced for international air and sea freight to prevent transit damage. Typical lead time from order confirmation to dispatch is 1–3 business days for in-stock units.

For procurement inquiries, volume pricing, or technical pre-sales support, contact our industrial automation team directly.