Intermatic GMXFM1D20-I-120 Timer

The Intermatic GMXFM1D20-I-120 is a high-performance electronic time switch designed for demanding commercial and industrial HVACR applications. Operating on 120V AC, this SPDT time switch features a 20-program memory capacity, allowing for precise 24-hour and 7-day scheduling. Housed in a durable NEMA 1 indoor enclosure, the unit is engineered to control lighting, pumps, motors, and fans with high accuracy. The integrated battery backup ensures program retention during power outages, while the manual override switch provides immediate circuit control for maintenance or testing. This digital timer module supports 20 Amp resistive loads, making it a reliable choice for mechanical contractors requiring a versatile solution for building automation and energy management. Its compact footprint facilitates easy integration into existing control panels, ensuring consistent cycling and optimized system efficiency across complex infrastructure environments.

Key Benefits for Technicians

• Versatile Programming: Supports up to 20 ON/OFF set points for flexible 7-day scheduling across multiple applications.
• Reliable Switching: Features a high-capacity 20A SPDT relay designed for inductive and resistive load management.
• Memory Protection: Equipped with a long-lasting battery to maintain program memory during site power interruptions.
• Simplified Installation: The NEMA 1 enclosure provides a standard industrial mounting solution for indoor environments.
• Contractor Friendly: Large screw terminals and intuitive interface reduce commissioning time on the job site.

Common Installation Questions

Can this timer handle 120V and 240V loads simultaneously?
No, this specific model is designed for 120V input. Always verify the coil voltage match before wiring to prevent damage to the digital logic board.

Does the battery power the load during a power failure?
The battery only maintains the internal clock and program settings; it does not provide power to the connected equipment or the relay coil during an outage.

Is the manual override permanent or temporary?
The unit features a manual override button that allows you to toggle the current state, which will remain until the next programmed event occurs.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.