Yokogawa AAI143-S50 Analog Input Module 4-20mA 16-Channel

Product Overview

The Yokogawa AAI143-S50 is a high-performance analog input module. It offers 16 fully isolated channels. Each channel accepts a standard 4 to 20 mA signal. This module ensures accurate data acquisition for industrial control systems. It includes a transmitter power supply for 2-wire or 4-wire devices. The unit is lightweight at just 0.3 kg. It is ideal for demanding process automation environments.

Application Scenarios

This module fits perfectly in distributed control systems. It works well in oil and gas plants. Chemical processing facilities also benefit from its use. Power generation stations use it for signal monitoring. Water treatment plants rely on its isolated inputs. It handles temperature, pressure, and flow signals. The AAI143-S50 supports both 2-wire and 4-wire transmitters. This flexibility makes it a versatile choice for engineers.

Technical Specifications

Input signal range is 4 to 20 mA. Allowable input current is 24 mA. Withstanding voltage is 1500 V AC for one minute. Input resistance varies from 270 to 350 ohms when on. It drops to 500 kohms or more when off. Accuracy is within ±16 µA. Data updates every 10 ms. Transmitter power output is 19.0 V or higher at 20 mA. Drift is ±16 µA per 10 °C. Maximum current draw is 230 mA at 5 V DC. It also draws 540 mA at 24 V DC. External connections use pressure clamp terminals or MIL cables.

Installation & Maintenance Guide

Mount the module securely on a DIN rail. Connect input signals using the correct cable type. Use a KS1 dedicated cable for best performance. Set each channel for 2-wire or 4-wire mode via pins. Ensure power is off before making connections. Check for loose wires during routine maintenance. Keep the module clean and free of dust. Monitor ambient temperature to maintain drift specifications. Replace the unit if input accuracy degrades.

Packing List

One Yokogawa AAI143-S50 analog input module. One user manual. One set of pressure clamp terminals. One MIL connector cable. No additional accessories are included.