Follow this guide to order the proper transformer for your GTO powered gate. There are 5 choices and not all will work with all GTO gate operators.

Background Information:
GTO, Inc. upgraded all operators in March 2000 to comply with UL325 safety requirements. With this and other changes, different transformers were required than were included on original equipment. More importantly, operators made after March of 2000 are different and require different transformers.

If you bought your operator after March of 2000, chances are you have the new upgraded UL325 operator. It is possible to have purchased it after March and have an older style. Vendors were allowed to sell their existing stock and the time of the change. If you bought it from Hoover Fence after March 2000, you have the new UL325 regardless of which operator model you purchased.

One way to tell the difference in the old style and new is the new one has a warning beeper feature. Also, the new UL325 had a change in the way the control cables connected. The old style had plugs on the end that connected to the control box. The new style has no plug on that end. It has bare wires that slide into the control box and connect to a terminal board.

Older style transformers will work on new operators, but newer ones will not operate on older ones.

Product Code: RB502

Replacement Transformer
1. For PRO1000 prior to Mar. 2000 UL-325 changes (old style)
2. For Mighty Mule Operators prior to Mar. 2000 UL-325 changes (old style)
3. For PRO2000 prior to Mar. 2000 UL-325 changes (old style) Read on..

If you have an older GTO or Mighty Mule operator, prior to March 2000 and without a warning beeper, use this transformer.

The PRO2000 has an additional requirement. If you use the gate less than 15 cycles per day, use this transformer. If you use the gate operator more than 14 cycles per day, DO NOT use this transformer. Use the RB419 shown on this page.
(more info)

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Product Code: RB419

Replacement Transformer
For PRO2000 prior to Mar. 2000 UL-325 changes (old style) Read on for important details.
For SL1000 prior to Mar. 2000 UL-325 changes (old style)

The PRO2000 has an additional requirement. If you use the gate more than 14 cycles per day, use this transformer. If you use the gate operator less than 15 cycles per day, DO NOT use this transformer. Use the RB502 shown above.
(more info)

SORRY, THIS ITEM HAS BEEN DISCONTINUED

Product Code: RB418

Replacement Transformer
For PRO1800 - pre-UL325 changes. The PRO1800 was discontinued after that.

You can readily identify the PRO1800. It has two batteries in the control box. One is 12 volt and a smaller 6 volt.

SORRY, THIS ITEM HAS BEEN DISCONTINUED

Product Code: RB566

Replacement Transformer
For PRO1000 after March 2000 UL325 changes
For Mighty Mule after March 2000 UL325 changes

Use this transformer for all newer PRO1000 and Mighty Mule FM250, FM700/702 operators. They will have a warning beeper feature built-in to the control box, whereas the older ones do not. Number of cycles per day usage does not matter.

SORRY, THIS ITEM HAS BEEN DISCONTINUED

Product Code: RB570

Replacement Transformer
For PRO2000 after March 2000 UL325 changes
For SL1000 after March 2000 UL325 changes
For Mighty Mule after March 2000 UL325 changes
Compatible with RB709U Receiver (garage door applications)

Use this transformer for  the PRO3000, PRO4000, PRO2500, PRO1500 as well as the Mighty Mule FM500/502 and FM350. Also used for all newer PRO2000 or SL1000 gate operators. They will have a warning beeper feature built-in to the control box, whereas the older ones do not. Number of cycles per day usage does not matter.

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