Yokogawa AAI841-S50/K4A00 Analog Input/Output Module

Overview

The AAI841-S50/K4A00 is a non-isolated analog I/O module for Yokogawa control systems. It interfaces field instruments with the FCU or ESB bus node unit. The module provides both current input and output, ensuring precise signal handling. It mounts in AIP501 or AIP511 I/O units and supports flexible 2-wire or 4-wire transmitter configurations.

Technical Specifications

• Function: Analog I/O Module
• Model Number: AAI841-S50/K4A00
• Number of Channels: 16 isolated analog input channels
• Signal Types Supported: 4–20 mA, 0–20 mA, 0–5 V, 1–5 V
• Resolution: 16-bit
• Accuracy (Span): ±0.1%
• Input Accuracy: ±16 μA
• Output Accuracy: ±48 μA
• Isolation: Channel-to-channel and channel-to-ground (non-isolated type)
• Interface Adapter: KS Cable Interface Adapter (ATK4A-00)
• Explosion Protection: None (S50 = standard version)
• Mounting: Installed in AIP501 or AIP511 I/O units
• Operating Temperature: –20°C to +60°C
• Power Consumption: Approx. 2.5 W
• Maximum Current Consumption: 310 mA (5 V DC), 500 mA (24 V DC)
• Input Signal: 4–20 mA DC
• Output Signal: 4–20 mA DC
• Allowable Input Current: 25 mA
• Input Resistance (Power ON): 400 Ω (at 20 mA) to 1000 Ω (at 4 mA)
• Allowable Load Resistance (Output): 0–750 Ω
• Transmitter Power Supply: 14.8 V or higher at 20 mA; 26.4 V or less at 0 mA
• Transmitter Configuration: 2-wire or 4-wire, settable per channel via setting pin
• Data Update Period: 10 ms
• Input Step Response Time: 100 ms
• Output Step Response Time: 40 ms
• Temperature Drift: ±0.1% per 10 °C
• HART Communication: Not available (-S suffix)