The YOKOGAWA AAM11, also cataloged as the AAM11 Analog Input Module, operates as a dedicated hardware component for high-density 4-20 mA current loop acquisition and galvanic signal isolation within CENTUM CS and CENTUM VP distributed control system platforms.
| Parameter | Specification |
|---|---|
| Model | AAM11 |
| Brand | YOKOGAWA |
| Origin | Singapore |
| Weight | 0.7 kg |
| Dimensions | 7.6 cm x 2.5 cm x 17.8 cm |
| Operating Temp | -10 deg C to +55 deg C |
| Power Consumption | 400 mA @ 5 VDC |
| Input Channels | 16 (Isolated) |
| Input Resistance | 250 Ohm |
| Accuracy | +/- 0.1% FS |
| Data Update Period | 100 ms |
The AAM11 utilizes a 250 Ohm shunt resistor configuration to convert incoming 4-20 mA DC current loops into readable voltage levels for the internal analog-to-digital converter. To maintain process integrity, the module features 1500 VAC/min galvanic isolation between the field-side channels and the system bus, effectively mitigating common-mode interference and ground loop potential in large-scale industrial deployments.
Q: Does the AAM11 support configurable burn-out detection for connected field transmitters?
A: Yes. The module allows for site-specific configuration of burn-out detection. Users can set the module to respond with either upscale or downscale signals upon detecting an open-circuit fault, facilitating rapid identification of sensor failure by the host controller.
Q: Are the 16 input channels independently isolated?
A: Yes. The design incorporates channel-to-channel and channel-to-bus isolation. This electrical barrier is intended to prevent noise propagation across the module, ensuring that a fault in one transmitter loop does not affect the measurement accuracy of adjacent channels.
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