Delta AS04AD-A 4-Channel Analog Input Module

The Delta AS04AD-A provides a practical interface between field-level analog devices and a Delta PLC control system. With four configurable analog input channels and support for both voltage and current signals, it can acquire process measurements from a variety of industrial instruments and sensors. Its 16-bit hardware resolution allows the PLC system to process analog signals with a high level of measurement detail.

The module supports commonly used industrial signal ranges such as 0–10 V, 1–5 V, 4–20 mA and 0–20 mA, as well as bipolar ranges including ±5 V, ±10 V and ±20 mA. It also provides signal disconnection detection for the 1–5 V and 4–20 mA ranges, making it suitable for applications where monitoring the integrity of field signals is important.

For machine builders, system integrators and maintenance teams working with Delta AS Series PLCs, the AS04AD-A can be used for applications involving process measurement, equipment monitoring, machine control and analog sensor integration. Its compact expansion-module design, removable terminal connection and configurable input ranges make it suitable for integrating analog field signals into automated control systems.