AAI135-H00 / K4A00 | Yokogawa | 8-Channel Analog Input Module

Product Description

The AAI135-H00 / K4A00 analog input module from Yokogawa is designed for distributed control systems requiring isolated current input channels with high accuracy and robust electrical isolation. This model provides 8 isolated input channels operating in the 4–20 mA DC range, making it suitable for precise monitoring of transmitters and sensors in demanding industrial environments. The H00 suffix indicates HART protocol support, while the K4A00 option provides compatibility with the KS cable interface adapter (Model: ATK4A-00).

Technical Specifications

• Manufacturer: Yokogawa

• Model Number: AAI135-H00 / K4A00

• Type: Analog Input Module (Current Input)

• Channels: 8 isolated input channels

• Signal Range: 4–20 mA DC

• Allowable Input Current: 25 mA

• Withstanding Voltage:

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

• Between input channels: 500 V AC for 1 minute

• Input Resistance:

• Power ON: 290 Ω at 20 mA, 450 Ω at 4 mA

• Power OFF: ≥500 kΩ

• Accuracy: ±16 µA

• Dimensions (W × H × D): 3.4 × 10.8 × 13 cm

• Weight: 0.3 kg

• Shipping Weight: 2.0 kg

• Suffix Codes:

• H: HART protocol support

• 00: Basic type

• K4A00: KS cable interface adapter option

Key Features

• Isolated Channels: Enhanced reliability and reduced interference

• HART Communication: Enables digital diagnostics and remote configuration

• Compact Design: Lightweight and efficient for cabinet installation

• High Accuracy: Stable measurement across industrial environments

• Flexible Connectivity: KS cable adapter option for extended interface compatibility

Application Scenarios

• Chemical and petrochemical process monitoring

• Power generation instrumentation

• Water treatment and distribution systems

• General industrial automation requiring isolated analog inputs

FAQ

Q: How many channels does the AAI135-H00 provide?  A: It supports 8 isolated analog input channels.

Q: What does the K4A00 suffix indicate?  A: It specifies compatibility with the KS cable interface adapter (ATK4A-00).

Q: Is HART communication supported?  A: Yes, the H00 suffix indicates HART protocol support.

Comparison with Similar Models

• AAI135-S00: Standard analog input module without HART support

• AAI135-H00: HART-enabled version with isolated channels

• AAI135-H00/K4A00: Advanced model with HART support and KS cable adapter option