AAM11B | Yokogawa | Current/Voltage Input Module

Description

The Yokogawa AAM11B functions as a Current/Voltage Input Module designed for acquisition of 0-20 mA DC signals, with transmitter power supply capability, auxiliary voltage output, and software‑defined input range settings.

Hardware Specifications

• Model: AAM11B

• Brand: Yokogawa

• Origin: Japan

• Weight: Not specified

• Dimensions: Not specified

• Operating Temp: Not specified

• Power Consumption: ≤300 mA at 5.0 V DC

• Input Signal: 0-20 mA DC (transmitter power supported)

• Input Resistance: 250 Ω

• Allowable Input Current: ≤40 mA DC

• Transmitter Power Supply: 25.0 to 25.5 V DC (≤60 mA DC limit)

• Auxiliary Voltage Output: 1 to 5 V DC; ≤1 Ω output resistance; ≥10 kΩ load resistance; shared system ground

• Square Root Extraction: Available by specification

• Accuracy Rating: Voltage input ±4 mV; Current input ±16 µA; Auxiliary output ±12 mV

• Effect of Ambient Change: 10 deg C → Voltage input ±4 mV and ±0.15 % of value; Current input ±32 µA; Auxiliary output ±24 mV

• Data Update Period: 50 ms

• Signal Insulation: Input signals insulated between systems

• Withstanding Voltage: 1500 V AC/min

• Installation: I/O Module Nest

• Wiring: M4 screw terminal connection

• Input Signal Settings: Configurable via software

4-20 mA HART Loop Protocol

The AAM11B supports integration with 4-20 mA HART loop protocol, enabling deterministic current and voltage signal acquisition. Input signals are insulated between systems with 1500 V AC/min withstand capability. Auxiliary voltage output provides stable reference supply, while square root extraction can be enabled via software for flow signal processing.

Frequently Asked Questions (FAQ)

Q: Can the AAM11B provide power to connected transmitters? A: Yes, the module supplies 25.0 to 25.5 V DC with a current limit of 60 mA DC.

Q: How does ambient temperature variation affect measurement accuracy? A: A 10 deg C change results in ±4 mV drift for voltage input, ±32 µA drift for current input, and ±24 mV drift for auxiliary output.

Q: Is square root extraction available for flow measurement signals? A: Yes, square root extraction can be specified via software configuration.

Field Installation Guidelines

• Install the module securely into the I/O Module Nest.

• Connect wiring to terminal blocks using M4 screws with proper torque.

• Maintain shield grounding at a single point to prevent ground loops.

• Separate signal wiring from high‑voltage cabling to minimize interference.

• Configure input signal ranges and square root extraction via software before commissioning.