Description

Product Description

Overview
The AAI135-H50 from Yokogawa is an 8-channel analog input module designed for precise current measurement and reliable digital communication via the HART protocol. Each input channel is fully isolated, ensuring signal integrity and system protection. This module is ideal for process control applications requiring accurate monitoring of 4-20 mA current signals.

Technical Specifications

• Model / Order Number: AAI135-H50

• Type: Analog Input Module (Current Input)

• Input Signal: 4 to 20 mA

• Number of Channels: 8 isolated input channels

• Maximum Allowable Input Current: 25 mA

• Input Resistance:

• Power ON: 290 ohms at 20 mA to 450 ohms at 4 mA

• Power OFF: 500 kilo-ohms or larger

• Withstanding Voltage:

• Between input and system: 500 V AC for 1 minute

• Between input channels: 500 V AC for 1 minute

• Accuracy: ±16 microamps

• Digital Communication Protocol: HART

• Explosion Protection: None (standard type)

• Option: KS Cable Interface Adapter (Model: ATK4A-00)

• Weight: 0.3 kg

Applications
The AAI135-H50 is suited for industrial process monitoring, distributed control systems, and precise analog signal acquisition in chemical, power, and water treatment industries. Its isolated channels prevent signal interference, making it reliable in complex plant environments.

FAQ
Q: Can this module be used in hazardous environments?
A: No, the standard AAI135-H50 does not have explosion-proof certification.

Q: Can it support more than 8 channels?
A: Each module supports 8 isolated channels. For additional channels, multiple modules can be connected to the control system.

Q: Does it support digital communication?
A: Yes, this module supports the HART protocol for communication and configuration.

Similar Models Comparison

• AAI135-H51: Includes additional features for explosion protection.

• AAI135-H52: Supports higher accuracy and extended input current range.

Specifications

• Brand: Yokogawa

Advantages

• High reliability in industrial environments
• Supports continuous operation
• Compatible with major PLC/DCS systems