Yokogawa AAM51 Current Voltage Output Module

Product Overview

The Yokogawa AAM50 is a Current Output Module for the CENTUM CS/VP RIO system. It provides 4–20 mA DC analog output signals to drive final control elements such as control valves, variable speed drives, and actuators. The module features high accuracy, fast response, and software-configurable output ranges, making it ideal for precise process control applications.

Key Specifications

• Model: AAM50
• Type: Current Output Module
• Output Signal: 4–20 mA DC
• Output Range: 1.0–21.5 mA DC (configurable)
• Output Voltage Limit: 25.5 VDC max
• Allowable Load Resistance: 0–750 Ω
• Output Resistance: 500 kΩ or more
• Accuracy: ±16 µA
• Data Update Period: 1 s
• Current Consumption: ≤4 A @ 5.0 VDC
• Signal Isolation: Non-isolated between system and field (channels non-isolated)
• Mounting: AMN11 I/O Module Nest

Environmental Specifications

• Operating Temperature: 0°C to +50°C
• Effect of Ambient Temperature: ±32 µA per 10°C change
• Wiring: M4 screw terminals on nest

Installation Guide

1. Install the AAM50 in an AMN11 I/O Module Nest.
2. Configure output range (4–20 mA or custom) via CENTUM VP engineering software.
3. Connect field devices to the nest terminals, ensuring load resistance does not exceed 750 Ω.
4. Verify output current with a calibrated multimeter before connecting to the final control element.
5. Perform loop tests to confirm proper valve or drive response to DCS commands.

FAQ

• Q: What is the maximum load resistance?
  A: The AAM50 can drive loads up to 750 Ω at 24 VDC supply; verify loop voltage is sufficient for the connected device.
• Q: Can outputs be used in redundant pairs?
  A: Yes, dual-redundant configurations are possible using short bars on M4 terminals for AAM51-style redundancy.
• Q: Is the output isolated from the system?
  A: The AAM50 provides non-isolated outputs; for isolated analog outputs, consider the AAI543 series.
• Q: What is the difference between AAM50 and AAM51?
  A: AAM50 is current output only; AAM51 supports both current and voltage output modes.

Selection Tips

• Choose AAM50 for simple 4–20 mA output applications where non-isolated signals are acceptable.
• Upgrade to AAM51 if voltage output (1–5 V, 0–10 V) flexibility is required.
• Verify total loop resistance (cable + device input) is within the 750 Ω limit.