Name: 8440-1955 8440-1884 Woodward Controller
Price: 7655 CNY
Availability: InStock

Description

Woodward 8440 Series Governor Installation‌

‌Models:‌ 8440-1955 (Standard), 8440-1884 (CAN Bus Interface)
‌Application:‌ Gas/Diesel Engine Speed Control | ‌Certification:‌ ATEX II 3G Ex nA IIC T4

‌Pre-Installation Requirements‌

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1. ENVIRONMENTAL

   - Ambient Temp: -40°C to +85°C (derate 1%/°C >65°C)

   - Vibration Limit: 7g RMS (5-2000Hz per ISO 10816-3)

   - Humidity: ≤95% non-condensing

2. MECHANICAL PREP • Mounting Surface: Flatness ≤0.1mm/100mm • Isolation: Use Vibration Pads (P/N: WP-24370) • Clearance: ≥75mm top/bottom for cooling

‌Mechanical Installation‌

‌Step 1: Mounting‌

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[For 8440-1955]

1. Secure via 4x M8 bolts (Grade 8.8)

2. Torque sequence:

    25 Nm → 50 Nm → Final 80 Nm ±5%

3. Grounding: Connect chassis to engine block with 10mm² braided strap

[For 8440-1884] • Additional CAN bus port guard (P/N: WP-1884-GRD) required • Maintain 30mm clearance from high-EMF sources

‌Step 2: Linkage Connection‌

‌Parameter‌	‌Specification‌
Actuator Rod Type	316SS Ø10mm
Angular Misalignment	≤0.5°
Preload Force	15-20N (measured at rod end)
Lubrication	Molykote PG-65 (Quarterly)

‌Electrical Wiring‌

‌Terminal Assignments:‌

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TERMINAL  8440-1955           8440-1884

1-2       Speed Sensor (VR)   VR Input + CAN-L

3-4       Power (18-32V DC)   Power + CAN-H

5-6       4-20mA Output       Analog Out + Shield

7-8       Actuator Drive      Actuator Drive

‌Wiring Practices:‌

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• SENSORS:

  - Magnetic pickup: ≥200mVpp @ 1000RPM

  - Shield termination: Drain wire to TB9

• POWER:

  - Reverse polarity protection: Max 60V/0.5s

  - Fusing: 10A slow-blow within 300mm

• CAN BUS (8440-1884 only):

  - Termination: 120Ω ±1% at bus ends

  - Baud rate: 250kbps (default)

‌Pneumatic/Hydraulic Interface‌

‌Actuator Connections:‌

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8440-1955:

  Port A  ───┬─ Actuator Supply (3-20 bar)

  Port B  ───┴─ Return Line (1:1 ratio)

8440-1884: Add servo pressure transducer (P/N: PT-7790)

‌Sealing:‌ Parker PR1 thread sealant on NPT ports
‌Tubing:‌ 6mm OD stainless steel, max bend radius 50mm

‌Commissioning Sequence‌

‌Pre-Start Checks‌

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• Insulation: >100MΩ @500V DC (power to ground) • Continuity: Actuator coil = 5.2Ω ±10%
‌Calibration‌

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[ProCal_8440] Droop=4% ; Engine-specific adjustment Gain=2.5 ; Start value Ramp_Time=8s ; Acceleration limit
‌Dynamic Test‌

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- Step response: 5-100% in <800ms - Stability: ±0.25% steady-state error

‌Critical Warnings‌

⚠️ ‌SAFETY INTERLOCKS‌
• Enable mechanical overspeed trip (TESTED) before energizing
• Install shear coupling (P/N: SC-8440) on actuator rod

⚠️ ‌PROHIBITED ACTIONS‌

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- Never apply power without load connected  

- Do not exceed 22mA actuator drive current  

- Avoid grounding CAN shield at both ends

‌Compliance & Documentation‌

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Standards:

- API 612 7th Ed. (Petroleum machinery)

- ISO 8528-5 (Generator sets)

- EN 60068-2-6 (Vibration immunity)

Post-Installation: • Tag controller with Woodward FIT ID • Complete calibration record (Form WR-8440-01) • File vibration spectrum analysis (0-500Hz)

‌Diagnostic Indicators‌

‌LED‌	‌State‌	‌Meaning‌
POWER (Green)	Solid	Normal operation
STATUS (Amber)	1 Flash/sec	CAN bus error (1884 only)
FAULT (Red)	3 Flashes + pause	Actuator overcurrent

8440-1955 8440-1884 Woodward PDF

8440-1955 8440-1884

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