Yokogawa AAI841-H50/A4S00 Analog Input/Output Module

Overview

The Yokogawa AAI841-H50/A4S00 is a dual-function analog I/O module designed for CENTUM CS 3000 / VP distributed control systems. It combines 8 analog input and 8 analog output channels into a single compact unit. Engineers use it in process industries that demand precise signal control with space-saving designs. This module supports HART communication and connects via a pressure clamp terminal block (ATA4S-00) for reliable field wiring. Its fast data update rate and high accuracy make it ideal for dynamic process environments.

Technical Specifications

General

• Model Number: AAI841-H50/A4S00
• Type: Analog Input/Output Module
• System: CENTUM CS 3000 / VP
• Terminal Type: Pressure clamp terminal block (ATA4S-00)
• Weight: 0.3 kg
• Communication: HART protocol supported
• Environmental Compliance: ISA G3 standard

Analog Inputs

• Channels: 8
• Signal Type: 4–20 mA DC
• Allowable Current: Up to 25 mA
• Input Resistance:
  • 400 Ω at 20 mA
  • 1000 Ω at 4 mA
  • ≥500 kΩ (power off)
• Accuracy: ±16 µA
• Step Response Time: 100 ms

Analog Outputs

• Channels: 8
• Signal Type:
  • −10 to +10 V DC
  • 4–20 mA DC
• Load Resistance: 0–750 Ω
• Circuit-Open Detection: Output current < 0.65 mA
• Accuracy: ±48 µA
• Step Response Time: 40 ms

Electrical Characteristics

• Channel Isolation: Non-isolated
• Transmitter Power Supply:
  • ≥14.8 V at 20 mA
  • ≤26.4 V at 0 mA
• Temperature Drift: ±0.1% per 10°C
• Power Consumption:
  • 310 mA @ 5 V DC
  • 500 mA @ 24 V DC

Performance

• Data Update Period: 10 ms