OEMAX NX-AO4C 4-Channel Analog Output Module

The OEMAX NX-AO4C is a 4-channel analog output module designed for the OEMAX NX Series PLC system. It converts digital control signals from the PLC CPU into standard 4-20 mA analog current outputs, enabling precise control of field actuators such as valves, variable frequency drives (VFDs), positioners, and other analog-controlled devices. The module is essential for applications requiring closed-loop process control and smooth, continuous regulation.

High-Accuracy Analog Output

The NX-AO4C provides high-speed and high-accuracy conversion, ensuring that the output signal accurately reflects the digital command from the PLC. The module features DC/DC converter and/or photocoupler isolation between the output channels and the internal circuit, protecting the control system from electrical noise and ground loops commonly found in industrial environments. This isolation also enhances signal integrity for long-distance transmission to field actuators.

System Integration

The NX-AO4C integrates seamlessly into the OEMAX NX Series I/O system. It connects to the system backplane (such as the NX-BASE10) and communicates with the CPU via the high-speed NX bus. The module can be combined with other NX Series I/O modules (digital inputs, analog inputs, temperature modules) to create a complete control system tailored to specific application requirements.

Application Domains

Typical applications include proportional valve control in hydraulic and pneumatic systems, speed regulation of VFDs for pumps and fans, position control of actuators in packaging machinery, and continuous regulation of pressure and flow in process industries. The NX-AO4C is also used in HVAC systems, textile machinery, and small-scale process automation.