C0-4AD2DA-2 Automationdirect

C0-4AD2DA-2 Automationdirect Programmable controller

Brand：Automationdirect Model number：C0-4AD2DA-2

Country of origin: United States Product weight：0.55kg

HS code：8517623990

Product Details：

Product Dimensions：

The C0-4AD2DA-2 is a combo module featuring 4 analog inputs and 2 analog outputs. It is designed to interface with the CLICK PLC CPU via the expansion port on the right side of the controller. This specific model is a voltage-only version, supporting standard industrial voltage ranges for both input and output channels. It utilizes a high-resolution analog-to-digital converter to ensure precise data acquisition for PID loops and monitoring tasks. The module is housed in a slim, DIN-rail mountable enclosure and features removable terminal blocks to simplify field wiring and maintenance.

Product Parameters

Module Type: Analog Combo (Input/Output)
Number of Input Channels: 4 (Single-ended)
Number of Output Channels: 2 (Single-ended)
Signal Range: $0-10 \text{ VDC}$ for both inputs and outputs
Resolution: 12-bit ( $1$ part in $4096$ )
Input Impedance: $20 \text{ k}\Omega$
Output Load Impedance: Minimum $2 \text{ k}\Omega$ (maximum $5 \text{ mA}$ load)
Conversion Time: $500 \text{ ms}$ per enabled channel
Power Consumption: $25 \text{ mA}$ at $24 \text{ VDC}$ (from the PLC power supply)
Terminal Block: Removable 11-point spring clamp or screw terminal options
Status Indicators: LED indicators for power and module health

Product Advantages

A primary advantage of the C0-4AD2DA-2 is its Space Efficiency. By combining four inputs and two outputs into a single module, it reduces the physical width of the PLC assembly, which is critical in small control panels. The Low Cost per Point makes it an ideal choice for budget-sensitive projects where sophisticated signal conditioning is required without the price tag of larger modular systems.

The Ease of Configuration is another benefit; the CLICK programming software provides a simple setup menu for analog scaling, eliminating the need for complex mathematical blocks to convert voltage to engineering units. Furthermore, the Removable Terminal Blocks allow for "pre-wiring" of the harness, enabling rapid module replacement in the field without the risk of miswiring individual leads.

Important Considerations and Precautions

When installing the C0-4AD2DA-2, it is vital to ensure Signal Grounding is handled correctly. Since these are single-ended inputs, all signals share a common return (0V) terminal; improper grounding can lead to "ground loops" which introduce significant noise and inaccuracy into the readings. Shielded Twisted Pair (STP) cabling should always be used for analog signals, with the shield grounded at only one end (usually the PLC cabinet) to prevent interference.

Users must also verify the External Power Supply. While the module draws logic power from the PLC backplane, the field devices (sensors and actuators) often require their own $24 \text{ VDC}$ supply. Ensure that the total current draw does not exceed the capacity of the CLICK power supply module. Finally, be aware of the 12-bit Resolution limits; while sufficient for most general-purpose applications like tank level or fan speed, it may not be precise enough for high-accuracy scientific laboratory measurements.

Product Applications

The C0-4AD2DA-2 is widely used in small-to-medium scale automation where analog feedback and control are necessary.

HVAC Control: Measuring room temperature and humidity (inputs) while controlling variable frequency drives (VFDs) for fan speed (outputs).
Pumping Systems: Monitoring suction and discharge pressure sensors while providing a speed reference to a pump motor.
Tank Level Management: Reading ultrasonic or hydrostatic level sensors and controlling a proportional valve to maintain a specific setpoint.
Simple Motion Control: Interfacing with potentiometers for manual speed adjustment and providing a $0-10 \text{ V}$ signal to a servo drive.
Greenhouse Automation: Monitoring soil moisture and light intensity while controlling the dimming levels of LED growth lights.

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