C550CCN-001C Johnson Controls Control Module

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.
• Modular architecture allowing for seamless integration with power and expansion modules.
• 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.