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- USA
- CAN
Ships within 48 hours · Estimated delivery Jul 10 - Jul 15
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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
4.0 ★★★★★
Based on 1413 reviews
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Product Reviews
★★★★★ 5
Great choicd
Color: Black
Work great, size is compact and out of the way.
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Reviewed in the United States on June 11, 2026
★★★★★ 5
Reliable and Versatile Adapter for My MacBook Air
I have a 13-inch MacBook Air, M4, 2025, and I use it for everything: work, watching videos and series, and occasionally gaming. I also regularly attend court hearings and professional meetings through Zoom, Google Meet, and similar platforms, so I cannot afford connection issues.
This adapter, especially with its LAN port, has been very useful. It gives me more confidence when attending hearings online because I can rely on a stable wired connection. It also works well while connecting other devices, such as microphones or pen drives, which makes it very versatile.
The finish and materials feel solid and high-quality. I used to have a white plastic adapter from another brand, but it ended up changing color with use. This one stays cleaner, looks more professional, and is easier to keep in good condition.
It is easy to carry, practical, and very efficient.
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Reviewed in the United States on May 4, 2026
★★★★★ 5
Good quality product
Good value for the price I paid. I have all the slots in use and it works fine. It really helps increase the reading and network speeds, if (like in my case) I have to use both ethernet and/or wifi antenna for my company laptop.
It is slim, sturdy, discreet and I like the main cable that connects to the PC is very flexible like a cord.
Very happy with it.
The only downside is that it gets very hot, I don't know why, but other than this, it really meets my expectations!
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Reviewed in the United States on May 16, 2026
★★★★★ 5
Quality
Works very well, I also have the 11 in 1 green mac mini m4 docking hub with s 1Tb external drive installed. So f a r I'm impressed we with the quality of green products and their competitive pricing. Will be purchasing green cables in the near future. Ugreen has become my new go to company for accessories.
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Reviewed in the United States on May 18, 2026
★★★★★ 5
One cable does it all, rock solid Ethernet and great 4K output
This hub has simplified my desk setup considerably. I plug it into my MacBook and instantly have Ethernet, 4K HDMI, two USB-A ports, and 100W charging all from one connection. The Ethernet is Gigabit and the speeds are as fast as plugging directly into the router. The 4K HDMI output to my monitor is clean with no flickering. It runs slightly warm during extended use but nothing alarming. Build quality feels solid and UGREEN has been consistently reliable in my experience. Worth every penny if you need to expand a USB-C only laptop.
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Reviewed in the United States on May 5, 2026