*Double-screen (double light beam) display
*Fully computerized digital automatic adjustment and calibration
*Fully open internal parameter setting
*Multi-signal input selection
*Auto/manual interference free switchover
*Multi-control and output mode selection
*Valve position ratio or upper/lower limit and alarm
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| I. Function Characteristics |
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Standby operation unit for DCS and single-loop adjuster, which receives specified valve position input signal from DCS or adjuster and outputs specific analog valve position output signal. Then, servo-amplifier drives the actuation mechanism. |
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Automatically trace input value and control output (analog amount). When the instrument is in automatic operation mode, the specified valve position input and output are linked straight forward to realize the automatic control by DCS or adjuster on valve. |
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When the instrument is in manual operation status, its function equals to an operation unit. The valve position can be controlled directly with the pushbuttons on the instrument panel to realize manual/auto interference free switchover. The switchover between auto/manual mode of the instrument is bidirectional and interference free. |
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Valve ratio or upper/lower limit function and valve position alarm can be set. |
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Failure self-diagnosis function is available. |
| II. Technical Parameters |
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Power: 220VAC or 24VDC |
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Specified valve position input and output: 0~10mA or 4~20mA or 0~5V or 1~5V common |
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Valve position feedback input and output: 0~10mA or 4~20mA or 0~5V or 1~5V common |
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Manual/auto status output::relay contact 220VAC/3A or 24VDC/3A |
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Alarm status output: relay contact 220VAC/3A or 24VDC/3A |
