AAM11 | Yokogawa Current/Voltage Input Module

Product Overview

The Yokogawa AAM11 is a Current/Voltage Input Module for the CENTUM CS/VP RIO system. It accepts 0–10 VDC voltage and 0–20 mA current signals from field transmitters and sensors, converting them to digital data for the DCS. The module supports transmitter power supply (24 VDC loop power) and features high accuracy, signal isolation, and software-configurable input ranges.

Key Specifications

• Model: AAM11
• Type: Current/Voltage Input Module
• Input Signal: 0–10 VDC, 0–20 mA DC
• Input Resistance: 1 MΩ (voltage), 250 Ω (current)
• Allowable Input: -10 to +30 VDC, 40 mA DC max
• Transmitter Power Supply: 25.0–25.5 VDC (output current limit: 60 mA max)
• Auxiliary Voltage Output: 1–5 VDC (output resistance ≤1 Ω, load ≥10 kΩ)
• Accuracy: Voltage ±4 mV; Current ±16 µA; Auxiliary output ±12 mV
• Data Update Period: 50 ms
• Current Consumption: ≤300 mA @ 5.0 VDC
• Signal Isolation: 1500 VAC/min between input and system

Environmental Specifications

• Operating Temperature: 0°C to +50°C (typical RIO module range)
• Effect of Ambient Temperature: ±4 mV / ±32 µA per 10°C change
• Mounting: Install in I/O Module Nest (AMN11)
• Wiring: M4 screw terminals on nest

Installation Guide

1. Install the AAM11 in an AMN11 I/O Module Nest.
2. Configure input type (voltage or current) and range via CENTUM VP engineering software.
3. Connect field signals to the nest terminals using M4 screws; ensure proper polarity.
4. For 2-wire transmitters, use the internal 24 VDC loop power supply.
5. Verify signal integrity and calibration using Yokogawa's built-in diagnostic functions.

FAQ

• Q: Can AAM11 power 2-wire transmitters?
  A: Yes, it provides 24 VDC loop power with a 60 mA current limit, suitable for standard 4–20 mA transmitters.
• Q: What is the difference between AAM11 and AAM10?
  A: AAM11 is the standard current/voltage input module; AAM10 is the simplified type with fewer features and lower cost.
• Q: Is the input isolated?
  A: Yes, all input channels are isolated from the system ground with 1500 VAC/min withstand voltage.
• Q: Can input signals be shared with other receivers?
  A: When powered off or in fault condition, the current loop opens. To share signals, add a 250 Ω shunt resistor and use voltage mode.

Selection Tips

• Choose AAM11 for standard analog input applications requiring 0–10 V or 0–20 mA with transmitter power supply.
• Use AAM11B instead if BRAIN protocol communication with Yokogawa transmitters is required.
• Ensure the I/O Module Nest (AMN11) has sufficient slots and power capacity for the number of modules installed.