Configured for discrete and analog gas hazard monitoring across industrial safety platforms, the Honeywell FGM-6300S (FGM-6300S Fixed Gas Detector) provides direct physical/electrical execution. The transmitter detects flammable, toxic, and oxygen concentration changes, converting sensor responses into 4-20 mA current loops, digital Modbus network registers, and relay output states.
Hardware Specifications
Parameter
Specification
Model
FGM-6300S
Brand
Honeywell
Origin
USA
Weight
Aluminum: 3.0 kg / Stainless Steel: 5.0 kg
Dimensions
Standard Field Enclosure Form Factor
Operating Temp
-40 to +70 deg C
Power Consumption
5.5 W (Electrochemical) / 7.5 W (CAT/NDIR)
Input Voltage
16-32 VDC (24 VDC nominal)
Signal Output
4-20 mA Source Type / RS485 Modbus RTU
Relay Outputs
3 x 2 A @ 30 VDC (NO/NC Selectable)
Enclosure Rating
IP66 / IP67 (Toxic & Oxygen), IP66 (CAT/NDIR)
4-20 mA HART Loop Protocol and Fieldbus Integration
The FGM-6300S utilizes an isolated 4-20 mA source current transmitter output to maintain linear signal integrity across long-distance control loop wiring. Channel-to-channel isolation safeguards internal microprocessor circuits from high-voltage surge transients and field ground loops, adhering to IEC 61000-4-5 surge immunity standards. The integrated RS485 Modbus RTU serial interface allows direct digital integration into distributed control systems (DCS), enabling remote polling of gas concentration values, sensor diagnostic flags, and dynamic relay trigger thresholds.
Frequently Asked Questions
Q: What threaded entry ports are available for field cable gland installations? A: The transmitter housing features 2 x 3/4 in NPT cable entries for field power/signal wiring and 1 x M25 entry designated for sensor head connection.
Q: Is the FGM-6300S suitable for deployment in functional safety applications? A: Yes. The device maintains third-party certification under IEC 61508 for SIL 2 safety instrumented system compliance.
Field Installation Guidelines
Mount the transmitter housing to a rigid support structure using 4 M8 bolts through the integral mounting plate holes.
Verify that all 3/4 in NPT cable glands and plug seals are installed with a minimum engagement of 5 full threads to maintain explosion-proof Ex d integrity.
Terminate incoming 24 VDC power and 4-20 mA signal conductors at the terminal block, ensuring proper torque on all screw fasteners.
Connect the main external grounding stud directly to the plant instrument earth grid using a low-impedance copper bonding strap.
Keep field signal and communication lines physically separated from high-voltage AC electrical lines by at least 200 mm to reduce electromagnetic noise interference.
