Yokogawa AAM21-S2 Analog Input Module
Configured for low-level thermal and millivolt signal conditioning in Yokogawa DCS architectures such as CENTUM VP and CS 3000, the Yokogawa AAM21-S2 (AAM21-S2 Thermocouple, mV, and RTD Input Module) provides direct physical/electrical execution. It handles thermocouple (TC), resistance temperature detector (RTD), and millivolt (mV) field signals, transmitting digital temperature data to the Field Control Station (FCS).
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | AAM21-S2 |
| Brand | Yokogawa |
| Origin | Standard Industrial Manufacturing |
| Weight | 0.3 kg |
| Dimensions | 3.2 cm x 10.7 cm x 13 cm |
| Operating Temp | -10 deg C to +55 deg C |
| Power Consumption | Powered via DCS Backplane Bus |
| Product Type | Thermocouple (TC), mV, and RTD Input Module |
| Communication Protocol | HART Protocol |
Cold Junction Compensation and Channel-to-Channel Isolation
The module incorporates high-accuracy cold junction compensation (CJC) algorithms to eliminate thermal measurement drift caused by gradient changes at field wiring terminal blocks. Individual channels feature galvanic isolation to protect low-level mV signals from electromagnetic interference and common-mode voltage spikes. Integrated HART communication permits simultaneous retrieval of process variables and digital field diagnostics from smart temperature transmitters.
Frequently Asked Questions
Q: Does the AAM21-S2 support simultaneous connection of different sensor types across its input channels?
A: Yes, the card operates as a universal analog input module capable of accepting low-level signals from thermocouples, RTDs, and direct mV sources based on channel software configuration.
Q: How does internal Cold Junction Compensation (CJC) function on TC inputs?
A: Internal thermistors on the terminal base measure the ambient reference junction temperature, enabling real-time voltage offset subtraction before digital conversion.
Field Installation Guidelines
- Slide the module into the designated slot on the CENTUM system baseplate until the latching mechanism clicks firmly into place.
- Wire thermocouples and RTDs using extension leads and shielded cabling, landing the shield wire on the designated enclosure earth terminal to prevent signal noise.
- Maintain a minimum clearance of 50 mm around marshalling cabinets to ensure proper convective cooling and prevent thermal drift across CJC sensors.
Yokogawa AAM21-S2 Analog Input Module
Yokogawa AAM21-S2 Analog Input Module
Configured for low-level thermal and millivolt signal conditioning in Yokogawa DCS architectures such as CENTUM VP and CS 3000, the Yokogawa AAM21-S2 (AAM21-S2 Thermocouple, mV, and RTD Input Module) provides direct physical/electrical execution. It handles thermocouple (TC), resistance temperature detector (RTD), and millivolt (mV) field signals, transmitting digital temperature data to the Field Control Station (FCS).
Hardware Specifications
| Parameter | Specification |
|---|---|
| Model | AAM21-S2 |
| Brand | Yokogawa |
| Origin | Standard Industrial Manufacturing |
| Weight | 0.3 kg |
| Dimensions | 3.2 cm x 10.7 cm x 13 cm |
| Operating Temp | -10 deg C to +55 deg C |
| Power Consumption | Powered via DCS Backplane Bus |
| Product Type | Thermocouple (TC), mV, and RTD Input Module |
| Communication Protocol | HART Protocol |
Cold Junction Compensation and Channel-to-Channel Isolation
The module incorporates high-accuracy cold junction compensation (CJC) algorithms to eliminate thermal measurement drift caused by gradient changes at field wiring terminal blocks. Individual channels feature galvanic isolation to protect low-level mV signals from electromagnetic interference and common-mode voltage spikes. Integrated HART communication permits simultaneous retrieval of process variables and digital field diagnostics from smart temperature transmitters.
Frequently Asked Questions
Q: Does the AAM21-S2 support simultaneous connection of different sensor types across its input channels?
A: Yes, the card operates as a universal analog input module capable of accepting low-level signals from thermocouples, RTDs, and direct mV sources based on channel software configuration.
Q: How does internal Cold Junction Compensation (CJC) function on TC inputs?
A: Internal thermistors on the terminal base measure the ambient reference junction temperature, enabling real-time voltage offset subtraction before digital conversion.
Field Installation Guidelines
- Slide the module into the designated slot on the CENTUM system baseplate until the latching mechanism clicks firmly into place.
- Wire thermocouples and RTDs using extension leads and shielded cabling, landing the shield wire on the designated enclosure earth terminal to prevent signal noise.
- Maintain a minimum clearance of 50 mm around marshalling cabinets to ensure proper convective cooling and prevent thermal drift across CJC sensors.
