Description
Honeywell 51304516-
Technical Specifications
- Supported Field Signal: 4 mA to 20 mA analog + superimposed HART digital signal
- Communication Protocol: HART protocol revision 5 and revision 6
- Channel Quantity: Multi-channel HART interface group
- Isolation Rating: 500 VAC group reinforced isolation
- Backplane Interface: HPM I/O backplane bus
- Operating Temperature: 0 °C to +60 °C
- Power Supply: 24 VDC field loop power, 5 VDC rack logic power
- Form Factor: Standard HPM plug-in rack card
- Hot Swap Support: Yes
Functional Features Simultaneous acquisition of analog 4-20mA value and HART digital variable from smart transmitter. HART command forwarding allows DCS operator station to read tag, range, diagnostic and device firmware information. Per channel loop break, low current and transmitter fault diagnostic. Front panel LED indicates module power, HART communication activity and channel fault. CRC checksum validates HART response frame and backplane communication frame. Supports burst mode data upload from HART smart transmitters.
Application Scenarios HART pressure, temperature, flow and level transmitter integration into TDC3000 DCS Smart valve positioner digital parameter reading and calibration Petrochemical plant intelligent instrument asset monitoring HPM rack HART interface spare replacement Legacy smart transmitter loop retrofit project
Performance Parameters
- HART baud rate: 1200 bps fixed
- Analog measurement accuracy: ±0.1 % full scale
- HART communication response timeout: Configurable from 200 ms to 1000 ms
- Isolation withstand voltage: 500 VAC for 60 seconds
- Channel crosstalk: -62 dB minimum
Material Composition FR4 multilayer PCB, HART modem IC, instrumentation amplifier, optocoupler isolation chips, precision 250 ohm shunt resistors, TVS surge diodes, screw terminal FTA interface, gold plated backplane edge connector, flame retardant plastic front panel.
Structural Features Standard eurocard plug-in form factor compatible with HPM I/O rack slot. Rear gold edge connector mates with HPM backplane bus. Internal isolation barrier separates field HART loop circuit and rack logic circuit. Front panel LED array shows power, TX/RX activity and group fault status. Anti-keying notch prevents reversed insertion. Analog signal traces are shielded to reduce HART signal interference.
Working Principle Field 4-20 mA current flows through precision shunt resistor and converts to analog voltage for ADC sampling. Superimposed HART frequency shift keying signal is demodulated by onboard HART modem chip. Modem parses HART command and response data. Valid digital variable and analog value are packed into communication frame and transmitted to HPM controller. If HART response is missing or current is out of range, channel fault flag is generated.
Installation Requirements Field HART wiring uses twisted shielded pair cable, shield grounded only at cabinet side. Install 250 ohm HART load resistor on field loop when required by transmitter specification. Separate HART signal cable from high voltage power cable. Configure transmitter tag and polling address in HPM configuration software after commissioning. Verify firmware compatibility between module and HPM controller.
Usage Notes Dual end shield grounding creates HART communication noise and packet loss. Do not apply AC voltage directly to 4-20 mA HART terminals. HART multi-drop loop configuration requires correct total loop resistance calculation. Do not replace onboard shunt resistor with non-precision resistor.
