C450CCN-4C Johnson Controls Control Module

Overview

The Johnson Controls C450CCN-4C is a versatile standard modular control unit from the System 450 family, engineered to provide reliable, stand-alone monitoring and control for commercial HVACR and industrial process applications. It features an intuitive four-button touchpad user interface with a backlit LCD display, allowing for straightforward field configuration. This module includes two SPDT line-voltage relay outputs and accommodates up to three inputs, enabling it to monitor and manage temperature, pressure, and humidity conditions simultaneously.

Features

• Modular, compact design supporting DIN rail or direct wall mounting with plug-together connectors
• Multi-purpose, field-configurable module designed to manage temperature, pressure, and humidity simultaneously
• Backlit Liquid Crystal Display (LCD) and a four-button touchpad user interface for easy programming
• Supports up to three inputs and up to ten outputs when connected to expansion modules
• High input signal selection capability to reference the highest value among multiple sensors
• Differential control functionality to monitor and maintain conditions between two sensor points

Specifications

• Supply Voltage: 24 VAC (20 to 30 VAC), Class 2, 50/60 Hz
• Power Consumption: 0.9 VA
• Relay Outputs: Two SPDT line-voltage relays
• Relay Contact Ratings: 1/2 HP at 120/240 VAC; 9.8 FLA at 120 VAC, 4.9 FLA at 208/240 VAC
• Input Signal Compatibility: 1,035 ohms at 25°C for A99 PTC temperature sensors, 0 to 5 VDC for humidity sensors and static pressure transducers, 0.5 to 4.5 VDC for ratiometric pressure transducers
• Temperature Setpoint Range: -40 to 250°F (-40 to 121°C)
• Operating Temperature: -40 to 150°F (-40 to 66°C)
• Operating Humidity Range: 0 to 95% RH non-condensing
• Enclosure Material: High-impact thermoplastic (Lexan 950), IP20 rated

Applications

• Commercial HVAC unit sequencing and on/off multi-stage temperature control
• Refrigerant and static pressure monitoring and fan control strategies
• Space, process, or duct humidity monitoring and control using compatible 0–5 VDC sensors
• Differential pressure or temperature management within mechanical systems
• Retrofit panel installations and new building automation system integration