Description
Honeywell 51304386-100
Technical Specifications
- Channel Quantity: 8 isolated pulse input channels
- Maximum Counting Frequency: 10 kHz per channel
- Input Signal Level: 24 VDC dry contact or active pulse
- Channel Isolation: 250 VDC optical isolation per channel
- Backplane Interface: HPM proprietary I/O backplane bus
- Network Interface: UCN universal control network
- Operating Temperature: 0 °C to +60 °C
- Power Consumption: 6 W maximum
- Form Factor: Standard DCS plug-in rack card
- Hot Swap Support: Yes
Functional Features Hardware high speed counter per channel eliminates CPU scan delay for pulse capture. Configurable pulse scaling converts raw pulse count into engineering units such as volume and mass. Totalizer function accumulates pulse value with non-volatile memory backup. Per channel open and short circuit wiring diagnostic and fault flag upload. Front panel tri-color LED indicates module power, communication and individual channel fault status. UCN communication frame uses CRC checksum for data integrity verification. Supports redundant HPM controller pairing for safety critical metering loops.
Application Scenarios Liquid and gas flow totalization control in petrochemical plant Turbine meter, vortex meter and positive displacement meter pulse signal acquisition Compressor and pump shaft rotating speed monitoring Custody transfer metering DCS system pulse input expansion Legacy TDC3000 UCN HPM rack spare replacement
Performance Parameters
- Counting accuracy: ±1 pulse within full frequency range
- Fault detection response: Less than 150 ms for wiring fault
- Non-volatile memory retention time: Minimum 10 years without power
- Optical isolation withstand: 250 VDC for 60 seconds
- UCN communication update interval: 100 ms base scan
Material Composition PCB substrate: FR4 multilayer flame retardant circuit board Core chip: High speed counter logic FPGA and communication processor Isolation device: Photocoupler optical isolation chips Protection components: TVS diodes, current limiting metal film resistors, decoupling ceramic capacitors Connector: Gold plated backplane edge connector Front panel: UL94 V0 black plastic panel with integrated extraction handle
Structural Features Standard eurocard plug-in form factor compatible with HPM I/O rack slot. Front panel LED array groups module status and eight channel indicators separately. Rear gold edge connector mates with HPM backplane bus. Internal isolation barrier divides field pulse circuit and internal logic circuit. Card edge anti-keying notch prevents reverse insertion. Internal layout separates high speed counting traces and communication traces to reduce crosstalk.
Working Principle Pulse signal transmitted from FTA termination board passes through optocoupler and triggers hardware counter register. Onboard FPGA reads counter value, executes scaling and totalizer calculation. Process value and diagnostic status are packed into CRC protected UCN message and sent to HPM controller. If channel impedance deviates from calibrated range, fault bit is set and transmitted to DCS alarm log.
Installation Requirements Confirm HPM firmware version compatibility before module replacement. Align guide rail and insert card fully until latch locks into place. Field pulse wiring must connect to matched 51304084-125 termination board. Maintain cabinet ventilation airflow to keep module temperature within rated range. Configure pulse scale factor and engineering unit in HPM configuration software after commissioning.
Usage Notes Hot swap operation must follow Honeywell defined maintenance sequence. Do not exceed 10 kHz maximum input frequency for each channel. Totalizer value will hold during UCN communication interruption. Internal counter register reset command requires authorized operator access. Do not modify onboard isolation and counter circuit components.
