AAM11B | Yokogawa Current/Voltage Input Module (Supports BRAIN)

Product Overview

The Yokogawa AAM11B is a Current/Voltage Input Module with BRAIN Protocol Support for the CENTUM CS/VP RIO system. In addition to standard 0–10 VDC and 0–20 mA analog input capabilities, it enables digital communication with Yokogawa BRAIN-compatible field devices (e.g., EJA pressure transmitters, YTA temperature transmitters) over the same 4–20 mA loop. This allows remote configuration, diagnostics, and multivariable data access without additional wiring.

Key Specifications

• Model: AAM11B
• Type: Current/Voltage Input Module (BRAIN Compatible)
• Input Signal: 0–10 VDC, 0–20 mA DC
• Protocol: BRAIN (Yokogawa proprietary digital communication over 4–20 mA)
• Input Resistance: 1 MΩ (voltage), 250 Ω (current)
• Transmitter Power Supply: 25.0–25.5 VDC (60 mA max)
• Accuracy: Voltage ±4 mV; Current ±16 µA
• Data Update Period: 50 ms
• Current Consumption: ≤300 mA @ 5.0 VDC
• Signal Isolation: 1500 VAC/min
• Mounting: AMN11 I/O Module Nest

Environmental Specifications

• Operating Temperature: 0°C to +50°C
• Relative Humidity: 5% to 95% RH (non-condensing)
• Wiring: M4 screw terminals on nest

Installation Guide

1. Install the AAM11B in an AMN11 I/O Module Nest.
2. Enable BRAIN protocol communication in the CENTUM VP engineering software.
3. Connect Yokogawa BRAIN-compatible transmitters (EJA, YTA series) to the input terminals.
4. Configure device parameters (tag, range, damping) via BRAIN communicator or CENTUM VP asset management.
5. Verify both analog (4–20 mA) and digital (BRAIN) communication integrity.

FAQ

• Q: What is BRAIN protocol?
  A: BRAIN is Yokogawa's digital communication protocol that operates over the standard 4–20 mA analog loop, enabling bidirectional data exchange without additional wires.
• Q: Which devices support BRAIN?
  A: Yokogawa EJA pressure/differential pressure transmitters, YTA temperature transmitters, and other BRAIN-compatible instruments.
• Q: Can AAM11B work with non-BRAIN transmitters?
  A: Yes, it functions as a standard analog input module (0–10 V, 0–20 mA) with non-BRAIN devices; digital communication is simply not utilized.
• Q: What is the difference between AAM11 and AAM11B?
  A: AAM11B adds BRAIN protocol support; AAM11 is standard analog input only. Both have identical analog specifications.

Selection Tips

• Specify AAM11B when using Yokogawa BRAIN-compatible field devices for enhanced diagnostic and configuration capabilities.
• Use standard AAM11 for non-Yokogawa or non-BRAIN transmitters to reduce module cost.
• Ensure BRAIN communicators or CENTUM VP asset management software is available for device configuration.