The Yokogawa AAI143-S50/A4S00 is a 16-channel, isolated analog input module designed for high-precision signal acquisition in industrial automation systems. It accepts 4–20 mA signals, provides HART communication capability, and features high noise immunity and channel isolation, making it ideal for critical process monitoring.

Applications

• Process automation in oil & gas, chemical, and power industries

• SCADA systems

• Distributed control systems (DCS)

• Intrinsically safe areas (with isolation barriers)

• Redundant control environments

Product Advantages

• 16 fully isolated input channels

• Supports HART communication

• Fast 10 ms data update rate

• High input accuracy (±16 µA)

• Channel-wise 2-wire/4-wire configuration

• Strong surge resistance with surge-absorbing terminal block

• Dual-redundant compatibility for reliability

• Compact form factor suitable for dense installations

Technical Specifications

FAQ

Q1: What type of signals does the AAI143 module accept?

A1: It accepts 4 to 20 mA DC current signals.

Q2: Is each input channel isolated?

A2: Yes, all 16 channels are electrically isolated.

Q3: Can the module be used in redundant systems?

A3: Yes, it supports dual-redundant configurations.

Q4: Does it support HART communication?

A4: Yes, it supports HART protocol for compatible devices.

Q5: What is the accuracy of the input measurements?

A5: It offers ±16 µA accuracy.

Q6: What is the input resistance when powered on?

A6: It ranges from 270 Ω to 350 Ω, depending on the current.

Q7: What type of terminal block does /A4S00 represent?

A7: It refers to a pressure clamp terminal block.

Q8: What kind of isolation voltage does the module withstand?

A8: 1500 V AC between system and input for one minute.

Q9: Can this module power 2-wire transmitters?

A9: Yes, it provides 19–25.5 V for 2-wire transmitters.

Q10: Is a Zener barrier allowed for intrinsic safety?

A10: No, use an isolation barrier instead of a Zener barrier.