1Pack Automatic Engine Controller GCU-20 GCU20 For Generator Control Unit

Feature:The GCU-20 is a microprocessor-driven automatic engine and generator control unit, built for reliable pump engine control and generator set management with universal 50/60Hz compatibility.It supports a wide 9–36VDC power supply and 5–300VAC alternator input, fitting various generator and engine configurations without extra power modification. Its selectable EM81 / EM121 MPU speed sensing covers ±2V to 70V peak signal input and 100Hz–10,000Hz frequency range, matching most magnetic pickup sensors for accurate speed detection.Five fully adjustable timers cover engine pre-heat (2–30s), starter cranking, stop delay, idle control (0–300s) and cool-down (0–300s); paired with six DIP switches for parameter configur... 1Pack Automatic Engine Controller GCU-20 GCU20 For Generator Control Unit

Feature:

The GCU-20 is a microprocessor-driven automatic engine and generator control unit, built for reliable pump engine control and generator set management with universal 50/60Hz compatibility.
It supports a wide 9–36VDC power supply and 5–300VAC alternator input, fitting various generator and engine configurations without extra power modification. Its selectable EM81 / EM121 MPU speed sensing covers ±2V to 70V peak signal input and 100Hz–10,000Hz frequency range, matching most magnetic pickup sensors for accurate speed detection.
Five fully adjustable timers cover engine pre-heat (2–30s), starter cranking, stop delay, idle control (0–300s) and cool-down (0–300s); paired with six DIP switches for parameter configuration, it can be flexibly tailored to different engine working conditions. The unit integrates full protection and alarm functions including start failure, high water temperature, low oil pressure, overspeed and underspeed. With annunciator alarm output and compatibility with the RA-20 Annunciator Module, it supports both on-site and remote monitoring to reduce equipment downtime.
With a modular structure and compact size, it enables fast panel installation. The front LED interface clearly displays running status and fault codes, with a dedicated lamp test function for easy daily maintenance. Boasting under 3W low power consumption and a -20°C to 70°C wide operating temperature range, it delivers stable long-term performance in demanding industrial environments.
Please check pictures for more details

Description:

Part Name: Generator Controller
Model: GCU-20
Product Type: Automatic Engine & Generator Control Unit
Housing Material: Flame-retardant ABS
Core Design: Microprocessor-based architecture
DC Supply Voltage: 9–36VDC
Alternator Input: 5–300VAC, 50/60Hz
MPU Signal Range: ±2V to 70V Peak
Rated MPU Frequency: 100Hz – 10,000Hz
Operating Temperature: -20℃ to 70℃
Storage Temperature: -35℃ to 85℃
Net Weight: 206g ±2%
Main Application: Pump engine control, generator set management

Package Content:

1PC GCU-20 Automatic Controller

Notes:
Please Allow 1-3CM Differs Due To Manual Measurement.
Due To The Different Display And Different Light, The Picture May Not -Reflect The Actual Color Of The Item.Thanks For Your Understanding.
If you are uncertain about the item,please feel free to contact us for confirm.

Payment

All payments are handled securely through Managed Payments.

Shipping

We process and dispatch your purchase within 1 business day after payment clearance.

For weekend orders, we will deliver the goods on Monday

Returns

All return, exchange or refund requests **must be submitted via platform message only**.
Any direct return of purchased items will not be processed.
We will closely examine the condition of the returned items and will not issue any refund/exchange before we make sure the items are in their original neat conditions.

Contact Us

Before leaving us neutral or negative response, please submit your inquiry via platform message.
We will do everything we can to give you a satisfying solution.
Please don't open case via or paypal.
We do our best to resolve any issue. Leaving negative responses and low ratings doesn't get things solved.
So please don't be upset and we will not let you down.

FAQ

How much does delivery cost and how long will it take?
You can check the delivery cost in the listing “Shipping and payments” section by selecting your country and entering your zip code. If it is not specified, please provide us your shipping address and zip code via message.

What payment methods do you accept?
We currently only accept payment via PayPal.

When will my order be dispatched?
We will arrange the shipment in 1 business day after the payment is cleared. The tracking number will be updated on in 24 hours after the shipment. Please notice that there is no shipment during weekend and holidays.


What do I do if I have not received my order?
Please simply contact us via messages, and then, we will get back to you as soon as possible with the update. Usually, we will follow up every shipment till customers get their order.

What do I do if my product is faulty?
Please simply contact us via messages, and then, we will get back to you as soon as possible. It will speed up the process if you could provide us some pictures or video to illustrate the issue details.

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Feature:

The GCU-20 is a microprocessor-driven automatic engine and generator control unit, built for reliable pump engine control and generator set management with universal 50/60Hz compatibility.
It supports a wide 9–36VDC power supply and 5–300VAC alternator input, fitting various generator and engine configurations without extra power modification. Its selectable EM81 / EM121 MPU speed sensing covers ±2V to 70V peak signal input and 100Hz–10,000Hz frequency range, matching most magnetic pickup sensors for accurate speed detection.
Five fully adjustable timers cover engine pre-heat (2–30s), starter cranking, stop delay, idle control (0–300s) and cool-down (0–300s); paired with six DIP switches for parameter configuration, it can be flexibly tailored to different engine working conditions. The unit integrates full protection and alarm functions including start failure, high water temperature, low oil pressure, overspeed and underspeed. With annunciator alarm output and compatibility with the RA-20 Annunciator Module, it supports both on-site and remote monitoring to reduce equipment downtime.
With a modular structure and compact size, it enables fast panel installation. The front LED interface clearly displays running status and fault codes, with a dedicated lamp test function for easy daily maintenance. Boasting under 3W low power consumption and a -20°C to 70°C wide operating temperature range, it delivers stable long-term performance in demanding industrial environments.
Please check pictures for more details

Description:

Part Name: Generator Controller
Model: GCU-20
Product Type: Automatic Engine & Generator Control Unit
Housing Material: Flame-retardant ABS
Core Design: Microprocessor-based architecture
DC Supply Voltage: 9–36VDC
Alternator Input: 5–300VAC, 50/60Hz
MPU Signal Range: ±2V to 70V Peak
Rated MPU Frequency: 100Hz – 10,000Hz
Operating Temperature: -20℃ to 70℃
Storage Temperature: -35℃ to 85℃
Net Weight: 206g ±2%
Main Application: Pump engine control, generator set management

Package Content:

1PC GCU-20 Automatic Controller

Notes:
Please Allow 1-3CM Differs Due To Manual Measurement.
Due To The Different Display And Different Light, The Picture May Not -Reflect The Actual Color Of The Item.Thanks For Your Understanding.
If you are uncertain about the item,please feel free to contact us for confirm.

PaymentShippingReturnsContact UsFAQ

All payments are handled securely through Managed Payments.

We process and dispatch your purchase within 1 business day after payment clearance.

For weekend orders, we will deliver the goods on Monday

All return, exchange or refund requests **must be submitted via platform message only**.
Any direct return of purchased items will not be processed.
We will closely examine the condition of the returned items and will not issue any refund/exchange before we make sure the items are in their original neat conditions.

Before leaving us neutral or negative response, please submit your inquiry via platform message.
We will do everything we can to give you a satisfying solution.
Please don't open case via or paypal.
We do our best to resolve any issue. Leaving negative responses and low ratings doesn't get things solved.
So please don't be upset and we will not let you down.

How much does delivery cost and how long will it take?
You can check the delivery cost in the listing “Shipping and payments” section by selecting your country and entering your zip code. If it is not specified, please provide us your shipping address and zip code via message.

What payment methods do you accept?
We currently only accept payment via PayPal.

When will my order be dispatched?
We will arrange the shipment in 1 business day after the payment is cleared. The tracking number will be updated on in 24 hours after the shipment. Please notice that there is no shipment during weekend and holidays.


What do I do if I have not received my order?
Please simply contact us via messages, and then, we will get back to you as soon as possible with the update. Usually, we will follow up every shipment till customers get their order.

What do I do if my product is faulty?
Please simply contact us via messages, and then, we will get back to you as soon as possible. It will speed up the process if you could provide us some pictures or video to illustrate the issue details.

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On Oct 29, 2026 at 06:27:18 PDT, seller added the following information: