Intermatic GMXFM1D20-I-24 Timer

The Intermatic GMXFM1D20-I-24 is a professional-grade electronic time switch designed for versatile 24-hour or 7-day scheduling in demanding commercial and industrial environments. Featuring a 24V AC/DC input, this unit is engineered for precision control of HVACR systems, including refrigeration merchandisers, ventilation fans, and motor loads. The SPDT (Single Pole Double Throw) heavy-duty relay provides a 16A resistive rating at 277 VAC, making it an ideal choice for both low and line voltage applications. Housed in a durable NEMA 1 indoor plastic enclosure, the digital module supports up to 20 programmable setpoints with a 1-minute minimum switching interval. A built-in battery backup ensures that your automated scheduling and clock settings remain intact during power interruptions, while the manual override with load status indication allows for immediate onsite adjustments without disrupting the saved configurations. This industrial-grade timer is a reliable solution for streamlining energy management in HVAC control circuits and general electrical automation.

• Flexible Programming: Configure 24-hour or 7-day schedules with up to 20 granular setpoint events for precise equipment cycling.
• Rugged Switch Rating: High-performance 16A SPDT relay handles various loads, including 1/2 HP at 120 VAC and 1 HP at 240 VAC.
• Enhanced Reliability: Integrated battery backup maintains time and program data during utility outages for consistent performance.
• Simplified Installation: The NEMA 1 enclosure features screw box lug terminals and multiple knockouts for fast, professional wiring.

How do I wire the Intermatic GMXFM1D20-I-24 for a 24V control circuit?
Connect your 24V power source to the designated input terminals. Since the unit features a dry contact SPDT switch, you can route the control signal through the Common (COM) and Normally Open (NO) or Normally Closed (NC) terminals based on your application's logic.

Can this timer be used for pulse or cyclic operations?
While primarily used for fixed ON/OFF events, the 20 programmable setpoints allow for complex daily or weekly routines. It is frequently utilized in generator exercising and septic treatment systems requiring intermittent operation.

What happens to the program if the 24V power is lost?
The internal non-volatile memory and long-life battery backup ensure that all digital timer settings and the current time of day are preserved, allowing the system to resume its schedule immediately upon power restoration.

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.