The Balboa Extension 2-Relay Circuit Board 55137 is a replacement for many 2-relay circuit boards by Balboa® and serves as a direct upgrade for many models. This is the 3-wire version with two relays that is used to add a 2-speed pump output. This is an expander circuit board for 2nd pump used on VS520 Systems. This includes 30 Amp fuse protection.

This product can only be used to replace existing expansion PCB and cannot be used with a controller that did not originally have it fitted.

• 2-relay design
• Sensor and two built-in connectors
• Circuit Board Application - Balboa Water Group
• Circuit Board Model - X-P332
• Circuit Board Type - New
• Circuit Board Accessory - Daughter Board

Fitment Guidelines:
For use with VS520SZ, VS520DZ, BP7 & BP501 Systems

Additional Information:
Alternate part numbers – 59-138-3094, 446621, 59097, BB55137