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The Woodward 8237-1247 is a triple modular over-speed detection system designed to monitor turbine rotor speed and acceleration for industrial turbines. Operating via active or passive magnetic pickups (MPUs), the unit issues a precise shutdown command to the turbine trip valve or corresponding trip system. The 8237-1247 features a bulkhead mount enclosure with IP56 dust and water resistance, integrating 4 to 20 mA speed readouts and Modbus communications. It utilizes two redundant trip relays and supports high-voltage power inputs to ensure reliable safety instrumented protection across hydro, steam, and gas turbine applications.
| Parameter | Specification |
|---|---|
| Manufacturer | Woodward |
| Model | 8237-1247 |
| Series | ProTech-GII |
| Dimensions | 330 mm x 486 mm x 153 mm |
| Enclosure Type | IP56 dust and water resistant |
| Current Limit | 500 mA |
| High Input Voltage | 100 to 150 Vdc at 30 W per module |
| Interrupt Time | 3 ms when on 1 power supply |
| Keypad / Display | 45 Keys Total |
| Low Input Voltage | Nominal 24 Vdc |
| Operating Temperature | -20 to +60 degC (-4 to +140 degF) |
| Storage Temperature | -20 to +65 degC (-4 to +158 degF) |
| Communication Ports | RS-232 Com Port (3) |
| Weight | 26 lbs 12 oz |
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Returns & Warranty


The Woodward 8237-1247 is a triple modular over-speed detection system designed to monitor turbine rotor speed and acceleration for industrial turbines. Operating via active or passive magnetic pickups (MPUs), the unit issues a precise shutdown command to the turbine trip valve or corresponding trip system. The 8237-1247 features a bulkhead mount enclosure with IP56 dust and water resistance, integrating 4 to 20 mA speed readouts and Modbus communications. It utilizes two redundant trip relays and supports high-voltage power inputs to ensure reliable safety instrumented protection across hydro, steam, and gas turbine applications.
| Parameter | Specification |
|---|---|
| Manufacturer | Woodward |
| Model | 8237-1247 |
| Series | ProTech-GII |
| Dimensions | 330 mm x 486 mm x 153 mm |
| Enclosure Type | IP56 dust and water resistant |
| Current Limit | 500 mA |
| High Input Voltage | 100 to 150 Vdc at 30 W per module |
| Interrupt Time | 3 ms when on 1 power supply |
| Keypad / Display | 45 Keys Total |
| Low Input Voltage | Nominal 24 Vdc |
| Operating Temperature | -20 to +60 degC (-4 to +140 degF) |
| Storage Temperature | -20 to +65 degC (-4 to +158 degF) |
| Communication Ports | RS-232 Com Port (3) |
| Weight | 26 lbs 12 oz |
Global Express Shipping
Returns & Warranty
Orders are processed and delivered Monday-Friday (excluding public holidays).
For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .
| Country of origin |
United States
|