| Name | Description |
|---|---|
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Standardised electrical current between 0 mA and 20 mA for information transmission. |
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Standardised electrical current between 0 mA and 20 mA for information transmission. |
|
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Standardised electrical current between 4 mA and 20 mA for information transmission. |
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Standardised electrical current between 4 mA and 20 mA for information transmission. |