Product Specification And Image
| Product Specification | Product Image | |
|---|---|---|
| Brand | YOKOGAWA |  |
| Product No. | EA1-A | |
| Type | SIGNAL CONDITIONER CARDS | |
| Input Signal | 4 to 20 mA DC | |
| Transmitter Power Supply | around 25.0 to 25.5 V DC | |
| Allowable Input Current | Typically 40 mA DC or less. | |
| Output Signal | 1 to 5 V DC | |
| Output Load Resistance | Typically 2 kΩ or more for voltage output | |
| Effect of Ambient Temperature Change | Max. ±0.2% of span for a 10∘C change | |
| Ambient Temperature | 0∘C to 50∘Cs | |
| Ambient Humidity | 5 to 90 %RH | |
Product Details
application
Temperature: From temperature transmitters connected to RTDs or thermocouples in ovens, reactors, or pipelines.
Pressure: From pressure transducers monitoring vessel pressure, line pressure, or differential pressure.
Flow: From flow transmitters measuring liquid or gas flow rates.
Level: The EA1-A would then convert these current signals into 1-5V DC, which could be readily interpreted by analog input cards of DCS (Distributed Control Systems) like Yokogawa's CENTUM series, or PLCs.
Feature
2-Wire Transmitter Input (4-20mA DC): The primary feature is its ability to directly accept a standard 4-20mA DC input signal from 2-wire transmitters.
Analog Output Signal (1-5V DC): The EA1-A typically converts the input current signal into a standard analog voltage output, commonly 1 to 5 V DC.
Signal Isolation: A critical feature for industrial environments, the EA1-A provides electrical isolation between the input signal, output signal, and power supply.
MORE DESCRIPTION
The YOKOGAWA EA1-A is a specialized signal conditioner card that played a crucial role in bridging the gap between field instrumentation and industrial control systems. Functioning primarily as a 2-wire transmitter input module, its main purpose was to accurately acquire and transform standard 4-20mA DC current signals originating from a variety of industrial sensors into a standardized 1-5V DC analog voltage output. This conversion was fundamental for seamless integration into various industrial automation and process control applications.
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