ICM Controls ICM492DX Single Phase Digital Line Voltage Monitor 80-300V

The ICM Controls ICM492DX is a single-phase digital line voltage monitor (LVM) designed to continuously monitor incoming line voltage and protect single-phase motors, compressors, and pumps from damaging electrical conditions. It guards against over-voltage, under-voltage, and rapid short cycling caused by transient faults and power interruptions — helping extend equipment life and reduce costly service calls.

The ICM492DX is the latest evolution of the ICM492 series, incorporating all features of the ICM492D while introducing significant upgrades including an expanded 50-event fault memory (up from 5), a numerical voltage setpoint for more precise configuration, and a bank of five surge arrestors for added protection of sensitive electronics such as mini-split systems.

Key Features:

• Protects against over-voltage, under-voltage, and rapid short cycling from transient faults and power interruptions
• 50-event fault memory for comprehensive diagnostics and troubleshooting
• Backlit digital display — easy to read in low-light conditions
• Tactile push buttons redesigned for increased durability
• Numerical adjustable voltage setpoint (95–280 VAC) for precise configuration
• Adjustable anti-short cycle time delay: 15–720 seconds
• Adjustable over-voltage and under-voltage settings: 5–25%
• Adjustable response/delay on fault: 0–10 seconds
• Configurable reset mode: 0 (auto) to 10 attempts
• Universal line voltage input: 80–300 VAC, 50/60 Hz
• Universal control voltage input (18–240 VAC) for thermostat integration
• Heavy-duty SPDT dry contact relay output
• LED status indicators: load energized, control, setup, and fault
• Bank of five surge arrestors for added transient protection
• Compact case design to fit into tight spaces

Electrical Specifications:

• Line Voltage: 80–300 VAC
• Control Voltage: 18–240 VAC
• Frequency: 50/60 Hz
• Accuracy: ±2%
• Low Power Consumption: Max 50 mA @ 120V, Max 100 mA @ 240V
• Relay Output: SPDT dry contact, Form C
• Connection Terminals: 0.25" male fast-on

The ICM492DX is the recommended current replacement for the ICM492 and ICM492D. It is compatible with a wide range of single-phase HVAC/R equipment including air conditioners, heat pumps, mini-splits, refrigeration units, and other motor-driven systems.