Johnson Controls CSDECM-C35200L1 Current Sensing Relay Self-Powered SPST-NO 200A

The Johnson Controls CSDECM-C35200L1 is a self-powered current sensing relay specifically designed for monitoring electronically commutated motors (ECMs) and other electrical loads in HVAC applications. This fixed setpoint current switch features a split-core design that allows for easy installation without disconnecting existing wiring.

Key Features:

• Self-powered operation requires no external control voltage
• SPST-NO (normally open) contact configuration
• Maximum current rating of 200 amps
• Fixed trip point of 0.35 amps eliminates false readings from ECM idle current
• Split-core design with 0.75-inch sensing hole diameter
• LED status indicator for visual confirmation
• Contact rating: 10A @ 125V AC or 1A @ 30V DC
• Surface mount installation with terminal strip connections

Specifications:

• Sensing range: 0.35A to 200A
• Body dimensions: 2.5" H x 0.57" W x 2.23" D
• Wire gauge compatibility: 14 AWG and 24 AWG
• UL Listed (File E493157) for industrial control equipment
• CE Mark compliant

The CSDECM series is engineered to prevent false triggers when monitoring ECMs, which draw small amounts of current even when idle. The output contact closes when monitored current exceeds the 0.35A threshold and opens when falling below it, providing reliable load detection for HVAC control systems.