Description
Honeywell 51304685-100
Technical Specifications
- Host Interface: HPM proprietary I/O backplane bus
- External Serial Ports: Up to six EIA-485 MS/TP channels
- Isolation Rating: 1500 VAC per serial channel
- Power Supply: 5 VDC and 24 VDC from DCS rack backplane
- Operating Temperature: 0 °C to +60 °C
- Power Consumption: 7 W maximum
- Form Factor: Standard HPM plug-in rack card
- Hot Swap Support: Yes
Functional Features Independent protocol parsing engine for each serial communication channel. Frame checksum validation for all inbound and outbound serial messages. Serial bus timeout, parity error and framing fault detection. Front panel LED for each port transmit, receive and module fault indication. Message buffer prevents data loss during burst transmission from external devices. Communication fault timestamp upload to DCS event log. Supports master and slave mode configuration for each serial port.
Application Scenarios Online gas and liquid process analyzer data integration into TDC3000 DCS Remote RTU and pumping station serial data collection Third-party chart recorder and historian serial interface HPM rack multi-port serial communication gateway spare replacement Water treatment plant remote equipment interconnection
Performance Parameters
- Serial baud rate range: 300 bps up to 38400 bps per channel configurable
- Message forwarding latency: Deterministic within HPM base scan cycle
- Fault detection response: <200 ms
- Isolation withstand voltage: 1500 VAC for 60 seconds
- Each channel supports independent bus termination resistor configuration
Material Composition FR4 multilayer PCB, serial transceiver IC, protocol processing FPGA, optocoupler isolation components, high power TVS surge suppression diodes, screw terminal block for EIA-485 wiring, flame retardant plastic housing, gold plated backplane edge connector.
Structural Features Standard plug-in eurocard form factor compatible with HPM I/O rack slot. Front panel LED indicators grouped by serial port TX, RX and module fault. External serial screw terminals arranged on front panel for field wiring access. Internal isolation barrier separates rack logic circuit and each external serial channel. Anti-keying notch prevents reversed insertion. Serial channels are electrically isolated from each other.
Working Principle HPM controller sends read or write request over rack backplane bus. Onboard FPGA repackages request into selected serial protocol frame and transmits to external device through assigned EIA-485 port. Response frame received from serial port is validated by checksum, parsed and converted back to DCS bus message format before sending to HPM controller. Continuous bus monitoring detects timeout and framing error for each channel independently.
Installation Requirements EIA-485 field wiring uses twisted pair differential cable and install termination resistor at bus far end. Separate serial communication cable from high voltage power wiring. Configure baud rate, parity, stop bit and protocol mode to match connected third-party device. Tighten terminal screws to specified torque value. Verify HPM firmware compatibility before replacement.
Usage Notes Do not swap A and B differential lines on EIA-485 bus. Duplicate termination resistors on same bus cause communication failure. Long distance field serial cable runs require additional external surge protection. Do not modify onboard protocol firmware without official factory release package.
