Configured for industrial automation systems to connect field devices such as transmitters and valve positioners to the control system, the Yokogawa AAM21 S2 (AAM21 S2 Analog Input/Output Module) provides direct physical/electrical execution.
Suffix Breakdown & Model Matrix
S2: Standard version configuration supporting analog input and output loops with HART communication capabilities.
Hardware Specifications
Parameter
Specification
Model
AAM21 S2
Brand
Yokogawa
Origin
Japan
Weight
Not specified in source data
Dimensions
Standard Yokogawa control card physical format
Operating Temp
-10 to 55 deg C
Power Supply
24 VDC
Input Signal
Standard 4-20 mA current loop
Communication Protocol
HART (Highway Addressable Remote Transducer)
Accuracy
0.1% or better
Channel-to-Channel Isolation and DCS Integration
The AAM21 S2 incorporates robust circuit isolation and protocol management to maintain signal integrity across process control networks. Key engineering attributes include:
Channel-to-channel isolation architecture designed to provide safety and reduce noise interference across operational loops.
Integrated 4-20 mA HART loop protocol support enabling remote configuration and diagnostics for up to 16 devices and 32 HART variables.
Support for multiple input signal types, including voltage and current, ensuring flexible field device connectivity.
Frequently Asked Questions
Q: Does the AAM21 S2 module support live hot-swapping under power?
A: No. Power must be isolated from the specific rack slot prior to module extraction or insertion to prevent backplane pin damage and transient current surges.
Q: What communication protocol and device capacity are supported by this module? A: The hardware supports the HART communication protocol, handling up to 16 devices and 32 HART variables.
Field Installation Guidelines
Secure the module firmly into the designated rack slot, ensuring physical retention latches are fully engaged to withstand industrial vibration.
Terminate all field wiring onto the designated terminal blocks while maintaining proper shielding and single-point grounding to prevent electromagnetic interference.
Verify that environmental conditions remain within the -10 to 55 deg C operating temperature window and utilize a 24 VDC power supply before energizing the system.
