Honeywell FC-SCNT01

Description

Product Brief Introduction

FC-SCNT01 is SIL2 certified pulse counter input module for Honeywell Safety Manager SIS system, receiving high-speed pulse signal output from flow meter, encoder, turbine meter field equipment. It realizes pulse frequency accumulation, instantaneous flow rate calculation and pulse loss fault diagnosis core functions, used for safety flow measurement and rotation speed over-limit interlock loops.

Technical Specifications & Core Performance Parameters

• Channel Configuration: 4 independent isolated pulse counter input channels
• Supported Pulse Signal Types: NPN open collector, PNP open collector, 24VDC square wave pulse
• Maximum Pulse Input Frequency: 10kHz per channel
• Pulse Count Storage Capacity: 32-bit counter register, maximum accumulated value 4294967295
• Galvanic Isolation Rating: 2500VAC channel-backplane isolation
• Safety Certification Grade: SIL2 IEC 61508 / IEC 61511
• Backplane Power Consumption: 5.5W maximum
• Physical Dimension: Standard 4TE rack slot width
• Net Weight: 0.42kg
• Operating Temperature Range: -10℃ ~ +65℃ cabinet internal

Material Composition

• Module Shell: Flame-retardant black PC anti-static plastic housing
• Pulse Sampling PCB: High-speed digital signal FR4 multi-layer circuit board
• Isolation Chip: High-speed digital optocoupler for pulse signal isolation transmission
• Wiring Terminal: Spring lock gold-plated anti-oxidation terminal block

Structural Features

• Compact single-slot slide-in modular design, compatible with FC-RPB2N12 12-slot backplane
• Front panel 4 independent LED indicators for pulse receiving status and channel fault
• Internal each pulse channel independent isolation circuit layout, eliminate crosstalk between multi-channel pulse signals
• Bottom terminal block separate power and pulse signal wiring partition to avoid wiring confusion

Working Principle

1. Field flow meter/encoder pulse signal input to channel high-speed sampling circuit
2. Digital isolation optocoupler transmit pulse signal to on-board counter FPGA chip
3. FPGA accumulate pulse quantity in 32-bit register, calculate real-time instantaneous frequency and convert to engineering flow/rotation speed value
4. Upload accumulated pulse data and real-time frequency value to FC-QPP-0001 main processor via backplane safety bus
5. Continuous pulse loss detection: no pulse input over set time threshold trigger channel fault alarm

Function Features

1. 4-channel high-speed pulse signal collection, support up to 10kHz high-frequency pulse input
2. Built-in pulse accumulation register realize total flow automatic statistics without external counting equipment
3. Per-channel independent galvanic isolation eliminate field ground loop pulse signal distortion
4. Configurable pulse loss fault diagnosis function for flow meter equipment failure monitoring
5. Hot-swap support without interrupting other channel pulse counting operation

Advantage Highlights

1. Specialized pulse counter safety module integrates frequency calculation and accumulation function, reduce external signal processing equipment
2. High 10kHz sampling frequency adapts to high-speed turbine flow meter and servo encoder pulse signal
3. SIL2 safety certification meets safety flow interlock system quantitative risk assessment standard
4. Built-in configurable pulse loss monitoring eliminate separate equipment failure detection circuit
5. Compact 4TE single-slot design improve cabinet space utilization rate

Applicable Industries

Natural gas pipeline turbine flow safety measurement, chemical production line mass flow meter interlock, motor rotation speed over-limit safety protection, petroleum product metering safety monitoring

Installation Requirements

1. Slide into FC-RPB2N12 backplane standard slot and lock front panel buckle
2. Pulse signal wiring use shielded twisted pair cable, cable shielding layer single-point grounded at cabinet ground row
3. Pulse cable wiring maintain minimum 20cm separation distance with AC power cable to avoid pulse signal interference
4. Reserve 20mm vertical ventilation gap between adjacent modules
5. Cabinet internal dust filter replaced every 3 months

Usage Precautions

1. Do not input AC sine wave signal to pulse channel, will cause permanent sampling circuit burnout
2. Set pulse input signal voltage within 10–30VDC standard range, over-voltage trigger channel lockout protection
3. Complete pulse counting calibration test after module replacement or flow meter maintenance
4. Do not hot-swap module during flow safety interlock automatic operation cycle
5. Ambient temperature exceeding +65℃ will cause high-frequency pulse sampling data loss