C550CCN-001C Johnson Controls Control Module

Part number C550CCN-001C from Johnson Controls, listed in Control Relays. KKM Solutions quotes this part with pricing and availability confirmed per order.

Overview The Johnson Controls C550CCN-001C is a digital electronic control module designed for the System 550 multi-purpose modular control system. It provides comprehensive single- or multi-stage on/off, proportional, or proportional-plus-integral control for temperature, humidity, and pressure applications. A key advancement of this specific module is its integrated A2L refrigerant leak sensing and mitigation capabilities, designed to safely manage lower flammability limit (LFL) levels in modern HVACR equipment. Features Built-in A2L refrigerant leak detection and mitigation logic that activates specific relays upon detecting refrigerant concentrations at or above 20% of the LFL. Supports the direct connection of up to two PENN GM200 series A2L refrigerant sensors via an included backplane terminal adapter, and up to six sensors total when utilizing a junction module. Embedded self-diagnostics that perform sensor checks once per minute to ensure reliable operational safety. Full-character LCD dot-matrix user interface display with an adjustable backlight and custom naming options for sensors and outputs. Local web page interface for configuring network credentials, updating firmware, and transferring configuration files via Wi-Fi. Specifications Sensor Inputs: Supports up to three inputs in any combination of temperature, pressure, humidity, or binary sensors. Relay Outputs: Two standard SPDT output relay contacts rated at 1/2 HP at 120/240 VAC. Expansion Capacity: Expandable up to a maximum of ten outputs in total using external relay or analog expansion modules. Control Outputs: 0-10 VDC analog output for A2L LFL level transmitting. Supply Voltage: 24 VAC Class 2 nominal (20 VAC to 30 VAC) or 24 VDC. Operating Temperature Range: -40°F to 150°F (-40°C to 66°C). Compliance: Certified under safety standards UL 60335-2-40 and UL 60335-2-89. Applications Commercial HVACR systems requiring precise multi-stage temperature and humidity monitoring. Commercial refrigeration equipment, such as walk-in freezers, utilizing electric defrost controls. Environmental safety setups requiring localized A2L refrigerant leak detection, automated mitigation control, and remote alarm notifications.