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Description
Automatic Controller GCU-20 for Generator Control UnitGCU 20 Automatic Engine and Generator Control Unit has many useful functions like annunciator alarm output and selectable EM81 EM121 MPU signal for speed sensing. It's suitable for pump engine control. GCU 20 also provide IDLE control for electronic governors. Features: Microprocessor based design Universal LED graphic interface, displays generator status and failures Modular design, quick installation With annunciator alarm output Selectable MPU
GCU-20 Automatic Engine and Generator Control Unit has many useful functions like annunciator alarm output and selectable EM81 / EM121 MPU signal for speed sensing. It's suitable for pump engine control. GCU-20 also provide IDLE control for electronic governors.Features:
Microprocessor based design
Universal LED graphic interface, displays generator status and failures
Modular design, quick installation
With annunciator alarm output
Selectable MPU signal for speed sensing
Suitable for pump engine control
With lamp test function for all front panel LEDs and annunciator lamps
Provide IDLE control for Elec. governors
Five adjustable time delay potentiometers
Six DIP switches for setting different engine parameters
Specification:
DC Supply:Voltage 9 to 36 Vdc
Alternator Input Range:
Voltage 5 to 300 Vac
Frequency 50/60 Hz
MPU Signal Input Range:+/-2V to 70V Peak
Rated MPU Frequency:100 to 10,000 Hz
Fuel Solenoid Signal Output:10 Amp @ 12/24 Vdc
Start Signal Output:10 Amp @ 12/24 Vdc
Annunciator Output:300 mA @ 12/24 Vdc
Power Consumption:Under 3 watts
Protection and Alarm Status Indicators:
Start Failure
High Water Temp.
Low Oil Pressure
No Speed Signal
Overspeed
Underspeed
Extra Prog. Input
Adjustable Timers
Engine Pre-Heat:2 to 30 seconds
Starter Cranking Time:1 to 15 seconds
Energize to STOP:1 to 15 seconds
Engine Idle (Governor):0 to 300 seconds
Engine Cool-Down:0 to 300 seconds
Environment
Operating Temperature :-20 to +60 °C
Storage Temperature:-35 to +85 °C
Relative Humidity:Less than 90%
Shipping Notes
- Free Standard Shipping on $100+ Orders to the USA.
- Except Preorder products are shipped in 48 hours.
- Delivery to the USA:
- Standard Shipping : 3-10 business days
- If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
- We offer a 30-day return/exchange service after receiving.
- Final sale items are not eligible for returns or exchanges.
- To process your return/exchange, please contact us at [email protected]
- Please click here for more details>>> Return & Exchange Policy
4.6 ★★★★★
Based on 12 reviews
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Product Reviews
★★★★★ 5
Practical and stylish backpack for work and everyday use.
Color: Apricot, Size: 16 Inch
This backpack is incredibly versatile and functional, designed for daily work, travel, and professional use. It features multiple compartments for easy organization of your belongings, including a dedicated laptop compartment that keeps your device secure and separate from other personal items.
The exterior is made of water-resistant nylon, offering added protection against moisture and daily wear and tear, making it ideal for the office or business meetings. Padded and adjustable straps provide comfort during extended use, while double zippers allow for quick and easy access to the main compartments.
With its sleek and functional design, this backpack strikes the perfect balance between style and practicality, suitable for both business environments and casual or travel use. Its dimensions allow you to comfortably carry standard-sized laptops, documents, accessories, and everyday personal items.
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Reviewed in the United States on January 11, 2026
★★★★★ 5
Elegant, Functional, and High Quality
Color: Apricot, Size: 16 Inch
I’m very impressed with this backpack. The design is modern and elegant, perfect for both work and daily use. The neutral beige color looks sophisticated and matches easily with any outfit.
The material feels high quality and durable, with smooth zippers and excellent stitching. It has a well-structured shape that keeps its form even when not fully packed. The compartments are very practical, allowing great organization for a laptop, documents, and personal items.
The straps are comfortable and padded, making it easy to carry for long periods without discomfort. Overall, this backpack combines style, functionality, and comfort perfectly.
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Reviewed in the United States on January 12, 2026
★★★★★ 5
Back pack
Color: Apricot, Size: 16 Inch, Color: Apricot, Size: 16 Inch
bought this backpack to carry my laptop, and it exceeded my expectations. The material feels strong and durable, perfect for daily use. It has a sleek, professional design with enough room for the laptop, charger, and a few accessories.
The zippers work smoothly, and the straps are comfortable even when the backpack is full. It’s also lightweight, making it easy to carry around.
Overall, it’s an excellent choice for students or professionals looking for a practical, stylish, and reliable backpack.
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Reviewed in the United States on November 28, 2025
★★★★★ 4
Good basic backpack
Color: Black, Size: 16 Inch
Good size backpack. Unfortunately the front side zip pocket does not fit 13 in laptop. Otherwise it's a pretty generic backpack. Material looks and feel good
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Reviewed in the United States on November 16, 2025
★★★★★ 5
Such a Pretty Backpack.
Color: Apricot, Size: 16 Inch
I love this backpack. It's very beautiful and very comfortable to wear. I mainly bought it for a trip to Prague, but I love this bag so much I started using it daily. The quality feels good all around. The zippers are really smooth and the straps are very comfortable. One of my friends happened to take such a liking to it that she ordered her own too. The different pockets allow for easy organization and quick access. It's very stylish and so far, its been quite durable. I've used it for a little less than 5 months and a trip to the other side of the world, but its still holding up.
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Reviewed in the United States on March 23, 2026