Product Short Description
Product Brief Introduction
Standard simplex FOUNDATION Fieldbus H1 interface main card of Emerson DeltaV S-series control system, core hardware for connecting intrinsic safety H1 fieldbus segments. It provides complete H1 bus physical layer transceiving, power supply and diagnostic functions, paired with D6 keyed terminal block accessories to form a complete fieldbus communication channel solution, certified for flammable industrial Zone 2 installation environments.
Description
Core Technical Performance Parameters
- Backplane Input Power: 12VDC LocalBus, 300mA rated power consumption
- H1 Loop Output Parameters: 9–32VDC bus supply voltage, 12mA maximum loop current
- Communication Protocol: FOUNDATION Fieldbus H1 IEC 61158-2, fixed 31.25kbps baud rate
- Max Fieldbus Devices Per Segment: 32 H1-compatible transmitters, valves and analyzers
- Environmental Temperature Range: -40°C ~ +70°C operation; -45°C ~ +85°C storage
- Shock Test Standard: 10g half-sine wave impact, 11ms duration
- Vibration Resistance: 1mm pp (2–13.2Hz), 0.7g acceleration (13.2–150Hz)
- Air Contamination Grade: ISA-S71.04 Class G3
- Safety Approvals: ATEX II 3G Ex ec IIC Gc, IECEx, FM Class I Division 2 T4
- Relative Humidity: 5% ~ 95% non-condensing
- Terminal Block Matching Key: D6 mechanical anti-mismatch lock
Functional Features
- Integrated intrinsic safety limited energy circuit, eliminating external safety barrier requirement for Zone 2 installations
- Hardware-level H1 bus short-circuit automatic current limiting and recovery protection
- Comprehensive self-diagnostic function covering bus power fault, cable disconnection, device offline, signal attenuation abnormality
- Three-color LED status indicator panel for power supply, bus data transmission and system fault alarm
- Hot pluggable rack design, support online module replacement without system shutdown
- Isolation design separates cabinet backplane logic circuit and field hazardous area bus circuit to block surge noise transmission
- Supports full function block management, device calibration data storage and H1 bus schedule configuration via DeltaV engineering software
- Built-in EMI suppression filter to resist variable frequency drive and high-power motor electromagnetic interference
Working Principle
The module receives power and configuration instructions from DeltaV rack LocalBus backplane. Internal dedicated H1 communication ASIC chip processes bidirectional differential fieldbus signals, provides low-current limited energy power supply to external field instruments via terminal block wiring. Measurement values, valve feedback signals and device diagnostic alarms uploaded from field H1 equipment are converted into DeltaV backplane compatible data frames and transmitted to the main controller; downlink control commands from the control system are modulated into H1 bus differential signals to adjust fieldbus actuator equipment. Continuous real-time impedance monitoring circuits detect bus short-circuit faults and immediately limit output current to prevent module burnout.
Material Composition & Structural Characteristics
- Shell Material: Black UL94 V-0 flame retardant anti-static ABS plastic
- Circuit Board: Double-sided FR4 fiberglass PCB with immersion gold anti-oxidation coating
- Isolation Components: High withstand voltage industrial optocoupler isolation chips
- Backplane Connector: Gold-plated copper edge contact strip for stable bus connection
- Locking Mechanism: Stainless steel spring snap latch for rack mounting fixation
Installation Requirements
- Mount on DeltaV standard vertical 8-slot I/O carrier rack, only compatible with D6 keyed KJ3242X1 series terminal blocks
- H1 field wiring must adopt dedicated shielded FOUNDATION Fieldbus cable, single-point shield grounding at cabinet protective earth bar
- Hazardous Zone installation must strictly follow Emerson document 12P5404 Zone 2 wiring specifications
- Vertical ventilation gap of minimum 20mm reserved between upper and lower adjacent modules
- Cabinet ground bus connected to facility earth with ≥4mm² copper wire
Application Scenarios
Petroleum refining, natural gas transmission, chemical synthesis, pharmaceutical sterile production, thermal power plant, coal chemical industry DeltaV DCS control cabinet FOUNDATION Fieldbus H1 field loop communication main control hardware.
Operation & Maintenance Precautions
- Module internal components cannot be disassembled or replaced by on-site maintenance personnel
- All fieldbus wiring modification must be performed with field loop power supply cut off
- Avoid laying fieldbus cables in parallel with high-current AC power cables to reduce electromagnetic noise
- Clean PCB surface dust with dry compressed air every 6 months during scheduled maintenance
- Do not connect non-H1 serial equipment to fieldbus terminals, will cause bus communication collapse
- Record fault LED alarm codes for remote technical support troubleshooting
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