Overview
The Yokogawa AAM21-S2 Analog Input Module delivers high-accuracy analog signal acquisition for process automation systems. Designed for use in CENTUM VP and ProSafe-RS platforms, it ensures stable and precise data collection from field transmitters and sensors. Moreover, the AAM21-S2 supports multiple signal types, including 4–20 mA and voltage inputs, making it highly adaptable to diverse industrial applications.
Built with Yokogawa’s proven engineering quality, the module provides excellent noise immunity, fast sampling, and strong environmental resilience. Therefore, it plays a critical role in maintaining operational reliability in continuous process control environments.
Technical Specifications
| Parameter |
Specification |
| Model |
AAM21-S2 |
| Function |
Analog Input Module |
| Number of Channels |
16 channels |
| Signal Types |
4–20 mA DC, 1–5 V DC, 0–10 V DC |
| Input Type |
Differential |
| Resolution |
12 bits |
| Input Accuracy |
±0.1% of full scale |
| Input Resistance |
250 Ω (current), 1 MΩ (voltage) |
| Isolation |
Channel-to-channel and channel-to-bus isolation |
| Sampling Cycle |
100 ms typical |
| Power Consumption |
Approx. 6 W |
| Operating Temperature |
0 to 60°C |
| Storage Temperature |
–20 to 70°C |
| Relative Humidity |
5–95% RH (non-condensing) |
| Mounting |
Node unit backplane (Yokogawa FCS) |
| Compatible Systems |
CENTUM VP, ProSafe-RS |
| Dimensions |
Approx. 110 mm × 160 mm × 30 mm |
| Weight |
Approx. 0.3 kg |
FAQ
Q1: What is the primary function of the AAM21-S2 module?
A1: It measures analog signals such as 4–20 mA or voltage inputs and transmits digital data to the control processor.
Q2: Can the AAM21-S2 be used in safety systems?
A2: Yes, it is compatible with both CENTUM VP and ProSafe-RS platforms for control and safety applications.
Q3: How many channels does the AAM21-S2 provide?
A3: The module includes 16 isolated analog input channels for independent measurements.
Q4: Does it support redundancy?
A4: Yes, it can be used in redundant system configurations for high availability and reliability.
Q5: What kind of maintenance is required?
A5: Minimal maintenance is needed; regular calibration and visual inspection ensure consistent performance.
