The function and working principle of intelligent handheld devices

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Suzhou Tiankang Automation Co., Ltd

E-mail
117419876@qq.com
Phone
13862283878
Address
Room 4, No. 99 Muye Road, Yushan Town, Kunshan City, Suzhou City, Jiangsu Province

Date: 2025-12-11Read: 1

1、 Product Introduction

There are two forms of manual operation in terms of functionality: pure manual operation and manual automatic manual operation. Pure manual operation is only connected to electric actuators and directly controls the forward and reverse rotation of the actuator through panel switches. Manual operators with manual and automatic functions are installed between the control systems of the actuator (regulators or computer-controlled DCS, PLC systems). When the manual operator is in manual mode, the actuator is directly controlled by the manual operator. When in automatic mode, the control of the actuator is handed over to the automatic control system, and the control current signal from the control system is converted into a switch signal or isolated control current signal to control the action of the electric actuator or electrical valve positioner, or manually or automatically output 4-20mA for controlling the frequency converter

2、 Performance characteristics

lThe handheld device contains a servo amplifier,direct driveDKJWaiting for positive power supply,Executive mechanism for reverse switch control.

lCan output isolated control current,The high isolation of its output current ensures stable control of the controlled actuator.

lValve position limit amplitude can be set,Ensure that the actuator operates within the set valve position range.

lCan set valve position control action sensitivity,To ensure the service life of the actuator.

lHaving hands/Automatic switching function,Widely applicable to computers,Regulator orDCS,PLCWaiting for automatic control system.

lThe valve position feedback signal can be the current,voltage,Multiple forms of input such as resistors,Suitable for various types of actuators.

3、 Performance indicators

For general technical specifications, please refer to the<General Technical Specifications for Digital Display Instruments>in this manual. Special technical specifications are as follows:

Input signal: 4-20mA, 0-10mA, 1-5V, 0-5V

Valve position feedback accuracy: ± 1.0% x full range

AC load capacity: 6A/220V, triggered by AC zero crossing

DC current output load capacity: 750 Ω

A device used as a backup instrument for operation in case of host failure or maintenance

Intelligent operator, also known as intelligent manual operator, is a supporting product of the regulator. It is mainly used for system operation or manual adjustment in special situations, and as a backup instrument for operation in case of host failure or maintenance.

The intelligent manual operator is suitable for use as a backup operator for DCS system circuit regulation control output and intelligent regulator control output. It can simultaneously input and display given signals and feedback signals, and can be used in conjunction with various sensors and transmitters to measure and display physical quantities such as temperature, pressure, liquid level, capacity, and speed. It can also be used in conjunction with various actuators to control, alarm, and collect data from equipment such as solenoid valves, electric control valves, and frequency converters. The intelligent operator can automatically receive the given signal from the system (or regulator) and the feedback signal from the valve position, adjust according to the deviation between the two, output the corresponding control quantity, and can replace the low-power servo amplifier to directly drive the valve. It can be connected to various regulators or computer control systems as a backup instrument, and does not apply automatic adjustment to the unit. It can only achieve the rated load of the unit after starting, stopping, and grid connection, and can automatically stop the unit after receiving accident signals.

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