AAI143-S50/A4S00 | Yokogawa | Analog Input Module

The Yokogawa AAI143-S50/A4S00 is a 16-channel isolated analog input module designed for 4-20 mA signal acquisition in CENTUM VP distributed control systems. It supports both 2-wire and 4-wire transmitters, with channel-level configuration and HART communication capability. Furthermore, its pressure clamp terminal block configuration provides a defined connection option for field signal wiring.

Key Features

• 16 isolated analog input channels for 4-20 mA signals.
• Supports 2-wire and 4-wire transmitter configurations.
• HART communication capability for digital communication with compatible field devices.
• 10 ms data update period for analog signal acquisition.
• 1500 V AC isolation withstand voltage between input and system.
• Pressure clamp terminal block configuration using ATA4S-00.

Technical Specifications

Input Signal and Transmitter Configuration

The AAI143 module receives 4-20 mA analog signals from field transmitters and provides 16 isolated input channels. Each channel can be configured for either a 2-wire or 4-wire transmitter through its setting pin. This arrangement allows different transmitter wiring configurations within the same module.

Furthermore, the 24 mA allowable input current provides the specified input operating limit. The input resistance varies with the signal current when the module is powered on, while the power-off resistance is 500 kOhm or higher.

HART Communication and Signal Processing

The module supports HART communication, allowing digital communication alongside the 4-20 mA analog signal. This capability can support access to compatible field-device information without relying solely on the analog measurement value.

The 10 ms data update period defines the interval for updating acquired input data. Meanwhile, the specified accuracy of +/-16 uA and temperature drift of +/-16 uA per 10 deg C provide reference values for signal measurement and operating-condition assessment.

Ordering Configuration

The complete ordering code identifies the module type and its specified hardware configuration:

Therefore, the full ordering code AAI143-S50/A4S00 should be retained when checking replacement requirements and terminal connection arrangements.

Frequently Asked Questions

Q: How many input channels does the AAI143-S50/A4S00 support?

A: It supports 16 isolated analog input channels, each accepting a 4-20 mA signal.

Q: Does the AAI143-S50/A4S00 support HART communication?

A: Yes. HART communication is available, allowing digital communication with compatible HART field transmitters alongside the analog current signal.

Q: What terminal block is specified for this model?

A: The /A4S00 option specifies a pressure clamp terminal block, model ATA4S-00. Check this configuration when selecting a replacement module or matching connection accessories.