Woodward 9907-167

Description

• Supply Voltage: 18–32 V DC (rated 24 V DC)
• Power Consumption: 77 VA
• Enclosure: NEMA 4 panel-embedded, front panel waterproof and dustproof
• Operating Temperature: −20 °C to +65 °C
• Storage Temperature: −40 °C to +85 °C
• Certifications: CE, UL/cUL, Class I Div 2
• Dimensions: 356 mm (L) × 279 mm (H) × 102 mm (D)
• Weight: 4.35 kg
• Digital Inputs: 16 (6 fixed-function + 10 programmable)
• Relay Outputs: 8 passive contacts (3 fixed trip/alarm/run + 5 programmable), 250 V AC / 5 A
• Analog Outputs: 6 isolated 4–20 mA
• Analog Inputs: Multiple 4–20 mA / 0–10 V
• Speed Input: Magnetic pulse pickup compatible, 0–6000 RPM, dual-channel redundant
• Communications: RS-232, RS-422, RS-485 Modbus RTU (three isolated ports)

• Dual independent actuator driver outputs (4–20 mA or 20–160 mA selectable):
  • Output #1 → main steam governor valve
  • Output #2 → extraction/admission valve
• Closed-loop speed control: isochronous (islanded), droop (paralleled), and multi-unit load distribution.
• Extraction/admission pressure composite regulation — decouples speed from extraction pressure.
• Multi-limit protection: valve position limits, min/max load, speed limits, extraction pressure limits.
• Automatic start-up logic: acceleration, warm-up, critical-speed bypass, coast-down ramp, overspeed protection (103% / 110% two-stage).
• Fault diagnostics: MPU open-wire, actuator short-circuit, AI loss, power failure, relay self-check with event logging.
• Integrated OCP with 2-line text display for local configuration and monitoring.

• Cogeneration (CHP): Extraction steam turbines balancing power generation and process steam supply.
• Back-pressure / Admission Turbines: Simultaneous control of inlet and extraction valves.
• Industrial Drive Turbines: Turbines driving compressors or pumps in refinery and chemical plants.

• Panel-cutout mount in a NEMA 4 enclosure front.
• Provide 24 V DC (18–32 V) power with correct polarity.
• Connect MPU speed sensors with proper shielding; observe phasing.
• Wire actuator outputs to Woodward EG/PGA actuators or 4–20 mA servo valves.
• Connect analog I/O and digital I/O per terminal assignment in the 505E manual.
• Establish RS-485 Modbus link to DCS/PLC; RS-232 for local PC configuration.

• Wear ESD grounding strap when handling the module.
• Verify all field wiring matches signal type (4–20 mA or 0–10 V).
• Do not exceed supply voltage range (18–32 V DC).
• Ensure proper ventilation; do not block front panel.
• Periodically review fault logs via OCP.
• Keep firmware updated through RS-232 using Woodward software.