topworx回讯器说明书(22)

爱默生公司的

D-Series

Master Installation, Operation & Maintenance

502.969.8000

4-20mA Transmitter: Options LX/MX/KX/EX/TX/ZX/0X

The 2-wire 4-20mA transmitter will generate a nominal 4 – 20mA output for full-range actuation of the valve. The transmitter is capable of generating signals below 4mA and above 20mA if the position sensor indicates an out of range value.

Features:

1) 2) 3) 4) 5) 6) 7) 8) 9) 10) 11) 12) 13) 14) 15)

Single push button easy calibration eliminates zero/span calibration interaction in both clockwise and counterclockwise actuator/valve rotation directions.

Non-volatile memory of set points (set points remain after loss of power) 4-20mA power connection is not polarity sensitive No internal backlash – direct shaft position feedback No gear wear or mechanical binding

Small package size for easier access to limit switch cams. The small packaging allows for additional options that can be mounted in the valve monitoring enclosure

Position measurement range from 20º to 320º. Factory set for 20º to 180º operation in counter clockwise rotation to open and 20º to 90º operation in clockwise rotation to open applications.

Advanced diagnostics includes detection of dead band, out of range indication and detection of internal memory errors Transmitter PCB is potted and sealed

Included with all valve monitoring switching options, incl. DPDT mechanical +/- 1% position linearity for the complete device

Selectable +/- 3% over and under travel capability or full linear options set during calibration Hysteresis: 0.5% of full-scale Repeatability: 0.3% of full scale Temperature Range: -40º to 85ºC

Potentiometer Only Shaft Position Monitoring Description

The potentiometer only version (without the 4-20mA Position Transmitter Module) will generate a ratio metric voltage output based on the excitation voltage and the position of the valve. Standard potentiometer options include 0-1k ohm and 0-10k ohm.

Potentiometer Features

–Hollow shaft mounting requires no gears and has no backlash

–Direct shaft position feedback

–Capable of 4,000,000 lifetime operations –Better than 0.3° resolution

–Conductive plastic Potentiometric sensor for environmental protection

–Temperature Range: -40º to +85ºC

Electrical Data

-Voltage Input Range: 8.5 - 34 Volts DC -Standard Output Signal: Two wire 4-20mA with out of range indication -Input Polarity: Bi-Directional

Potentiometer Electrical Data

-Voltage Input Range: 0-35 Volts

-Actual Electrical Travel 340° (dead band of 20°) -Current Maximum: 3mA

-Recommended operating wiper current is less than or equal to 1 micro amp (recommend using the wiper voltage to drive an operational amplifier working as a voltage follower in which a very small load is applied to the wiper)

-Independent Linearity ±2%

-Resistance Tolerance ±20%

Potentiometer Wiring

NOTE: Refer to the wiring diagram on the inside lid of your product

to determine actual pin out location

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