Yokogawa AAI143-H50 16-Channel Isolated Analog Input Module(4 to 20 mA)

Product Description

The AAI143-H50 analog input module from Yokogawa is designed for distributed control systems requiring accurate current signal acquisition. This model provides 16 isolated input channels for 4–20 mA DC signals, ensuring reliable measurement and integration with smart field devices. The H50 suffix indicates HART communication support, no explosion protection, and basic hardware type.

Technical Specifications

• Manufacturer: Yokogawa

• Model Number: AAI143-H50

• Type: Isolated Analog Input Module

• Channels: 16 isolated input channels

• Signal Range: 4–20 mA DC

• Allowable Input Current: 24 mA

• Withstanding Voltage: 1500 V AC between input and system (1 minute)

• Input Resistance:

• Power ON: 270 Ω at 20 mA, 350 Ω at 4 mA

• Power OFF: ≥500 kΩ

• Accuracy: ±16 µA

• Data Update Period: 10 ms

• Transmitter Power Supply: 19.0 V minimum at 20 mA, 25.5 V maximum at 0 mA (limit 25 mA)

• Transmitter Configuration: Supports 2-wire and 4-wire transmitters via setting pin

• Temperature Drift: ±16 µA per 10 °C change

• Current Consumption: 230 mA (5 V DC), 540 mA (24 V DC)

• Weight: 0.3 kg (Shipping weight: 2.0 kg)

• External Connections: Pressure clamp terminal, MIL connector cable, KS1 cable

• Communication Protocol: HART-enabled

Suffix Code Breakdown

• H: HART communication support

• 5: No explosion protection

• 0: Basic hardware type

Key Features

• Isolated Channels: Ensures reliable signal integrity

• HART Communication: Enables diagnostics and remote configuration

• High Accuracy: ±16 µA precision for stable measurement

• Compact Design: Lightweight and efficient for cabinet installation

Application Scenarios

• Chemical and petrochemical process monitoring

• Power generation instrumentation

• Water treatment and distribution systems

• Industrial automation requiring isolated multi-channel input

FAQ

Q: How many channels does the AAI143-H50 provide?  A: It supports 16 isolated analog input channels.

Q: What does the suffix “H50” indicate?  A: It specifies HART communication support, no explosion protection, and basic hardware type.

Q: Is redundancy supported?  A: Yes, the module is compatible with dual-redundant configurations.

Comparison with Similar Models

• AAI143-S00: Standard analog input module without HART support

• AAI143-H53: HART-enabled version with ISA G3 compliance

• AAI143-H50: HART-enabled with basic hardware type