Description

The Honeywell FC-TSGASH-1624P V1.0 is a safe gas and flame detector input Field Termination Assembly (FTA) designed as an interface module between 0–20 mA field transmitters and the SAI-1620m safe high-density analog input module within Honeywell Safety Manager systems. Featuring 16 input channels, this assembly supports both safety-related and non-safety-related instrumentation loops in industrial safety instrumented systems (SIS).

Each channel on the FC-TSGASH-1624P V1.0 incorporates a high-precision 500 Ohm resistor to convert input current signals into 0–4 VDC levels for processing by the SAI-1620m module with 0.1% accuracy. To safeguard connected instrumentation and loop wiring, every channel is individually protected by a 500 mA fast-acting fuse. The module routes input signals to single or redundant SAI-1620m modules using standard SICC-0001/Lx system interconnection cables.

In addition to primary signal conversion, the FC-TSGASH-1624P V1.0 features dedicated interfaces for HART communication. By providing direct connection points for multiplexer solutions from MTL or Pepperl+Fuchs (P+F), the module enables online HART diagnostic passthrough without disrupting safety loop integrity. The assembly is built on a DIN EN rail snap-in footprint and powered via a 24 VDC external supply line.

Features

• 16-Channel Analog Interface: Accommodates up to sixteen 0–20 mA (0–25 mA maximum) gas and flame detector loops with a shared common 0 V connection.
• Precision Signal Conversion: High-accuracy 500 Ohm onboard resistors convert input current signals to 0–4 VDC output levels for the SAI-1620m module.
• Individual Channel Fusing: Equipped with 500 mA Schurter fuses (5x20 mm) per channel to protect field power lines and field devices against short-circuit events.
• Integrated HART Multiplexer Support: Dedicated onboard CN2 and CN3 connectors enable direct integration with Pepperl+Fuchs and MTL HART multiplexer solutions using standard cable assemblies.
• Dedicated Shield Connections: Features 16 dedicated screw terminals designed for field cable shield grounding, optimizing noise immunity in critical monitoring applications.
• External Power Supply Voltage Monitoring: Allows Safety Manager software to continuously monitor connected 24 VDC supply voltage levels through the safe high-density analog input chassis.
• Dual DIN Rail Compatibility: Mounting provision supports both TS32 and TS35 x 7.5 DIN EN rails for flexible cabinet installations.

Applications

• Safety Instrumented Systems (SIS): Field wiring termination for combustible gas, toxic gas, and optical flame detectors connected to Honeywell Safety Manager systems.
• Process Safety Management: Analog input signal conditioning and HART diagnostic integration for critical 2-wire and 3-wire field transmitters.
• HART Asset Management Integration: Passthrough connection point for MTL4850 or Pepperl+Fuchs HART multiplexers to support remote instrument calibration and device health monitoring.

Technical Specifications

General

Electrical & Input Ratings

Protection & Fusing

Mechanical & Environmental

Connections / Interfaces

Installation Guidelines

1. Pre-Installation Inspection: Verify physical integrity and check that all 16 channel fuses (500 mA, 5x20 mm) are fully seated in their respective holders before mounting.
2. DIN Rail Mounting: Snap the assembly securely onto a standard TS32 or TS35 x 7.5 DIN rail within the control cabinet, allowing at least 226 mm of clear rail width.
3. Power Wiring Connection: Strip external 24 VDC power conductors to 8 mm (0.28 in). Connect the supply lines to the included keyed Weidmuller BVZ 7.62HP 2-pole plug, ensuring proper polarity (+ to Pin 1, - to Pin 2), and engage the red locking slides.
4. Field Signal Wiring: Connect 2-wire or 3-wire gas and flame detectors to screw terminal groups 1 through 64. Strip wires to 7 mm (0.28 in) and tighten terminal screws to a torque of 0.5 Nm.
5. Shield Grounding: Connect individual field cable shield drain wires to the dedicated shield terminal on each channel group and bond cabinet earth ground to the top-left ground screw connections.
6. System Interconnection: Connect the SICC-0001/Lx cable from connector CN1 on the FTA to the primary (or redundant pair) SAI-1620m module in the Safety Manager chassis.

Commissioning & Maintenance Recommendations

• External Power Verification: Confirm that Safety Manager software detects normal external supply voltage levels across the assembly via the SAI-1620m module diagnostic interface.
• Fuse Replacement: If a transmitter loop fails, check the corresponding channel fuse (F1 to F16). Replace blown fuses exclusively with Schurter 0001.2501 (500 mA, 5x20 mm, 250 VAC / 300 VDC) fuses to maintain safety compliance.
• HART Integration Check: When using external HART multiplexers, verify that the dedicated CN2 (P+F) or CN3 (MTL) ribbon cables are fully seated and that loop communications function without signal attenuation.

Compliance and Certifications

• CE Mark: European Conformity
• TUV: Safety Approved for High-Integrity Applications
• UL Listed: Underwriters Laboratories Standard Compliance
• CSA Certified: Canadian Standards Association Certified