The Protech 80901121 G-Fence 600z Replacement Electronic Board is the essential spare part for restoring full functionality to your G-Fence 600z Control Unit (40670205). This factory-original electronic board serves as a direct replacement for the main control electronics, enabling field-serviceable repairs without the need for complete unit replacement. Designed to maintain the same advanced perimeter security capabilities - including support for up to 10 independent detection zones, dry contact relay outputs, and accelerometer-based vibration detection - this spare board ensures minimal downtime and continued protection of your fence line. Ideal for maintenance technicians and security integrators, this replacement board simplifies service operations while preserving your investment in Protech G-Fence 600z perimeter security infrastructure.