C550CQN-001C Johnson Controls Control Module

Overview

The Johnson Controls C550CQN-001C is a digital electronic control module belonging to the System 550 series. It is a multi-stage controller designed to deliver accurate control over space conditions. The System 550 features a modular architecture, enabling scalable applications where users can connect optional power, expansion, and junction modules to tailor the assembly to specific system demands.

Features

• Multi-Stage Control: Supports staged on/off, proportional, or proportional-plus-integral (PI) control modes.
• Sensor Compatibility: Features three sensor inputs capable of reading any combination of temperature, pressure, humidity, or binary inputs.
• Scalable Architecture: Out of the box supports two analog outputs and is expandable up to a maximum of ten outputs using expansion modules.
• User Interface: Equipped with a user-friendly dot-matrix full-character LCD display with an adjustable backlight and a rotary encoder dial for easy menu navigation.
• Cloud Connectivity: Optional wireless cloud connectivity via the Controls System Cloud application (available with a subscription) for remote monitoring.

Specifications

• Supply Voltage: 24 VAC Class 2 (20 VAC to 30 VAC), 50/60 Hz, 10 VA minimum or 24 VDC ±10%, 10 W minimum.
• Power Consumption: 3 VA maximum.
• Analog Outputs: Two built-in analog outputs configured for Voltage Mode (0–10 VDC, 10 VDC maximum output voltage, 10 mA maximum output current).
• Input Signal Ranges: 0–10 VDC for active sensors, 0–5 VDC for static pressure transducers, 0.5–4.5 VDC for ratiometric pressure transducers, 500 Ω to 2,100 Ω for PTC sensors, and 300 Ω to 500,000 Ω for NTC sensors.
• Operating Temperature Range: -40°F to 150°F (-40°C to 66°C).
• Operating Humidity Range: Up to 95% RH non-condensing, with a maximum dew point of 85°F (29°C).
• Enclosure: Type 1, IP20 high-impact thermoplastic.
• Dimensions: 5.09 in. x 2.4 in. x 2.7 in. (129 mm x 61 mm x 69 mm).
• Weight: 0.50 lb (225 g).

Applications

The C550CQN-001C is widely applied in commercial HVAC/R environments where precise control over environmental parameters is required. It is commonly used for managing complex temperature and humidity levels in food preservation areas, such as walk-in freezers and supermarkets, to extend the shelf life of perishable items. It is also utilized in building automation systems that demand precise static pressure or proportional environmental control through analog signals.