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PF-KBP-21Q-3

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POUNDFUL PF-KBP-21Q-3 is a programmable potentiometer transmitter that converts a 0–100% resistive position input into an isolated 4–20 mA signal.
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Technical specifications for PF-KBP-21Q-3

  • Manufacturer:
    POUNDFUL
  • Part Number:
    PF-KBP-21Q-3
  • Product Family:
    POUNDFUL
  • Product Type:
    Programmable Potentiometer Transmitter
  • Stock:
    1
  • Input type:
    Potentiometer position
  • Input range:
    0 to 100%
  • Output signal:
    4 to 20 mA DC
  • Auxiliary power:
    24 V DC
  • Input resistance selection:
    200 Ω to 50 kΩ
  • Excitation voltage:
    2.5 V DC
  • Accuracy at 23 ±5 °C:
    0.1% of full scale
  • Output ripple:
    Less than 0.1% of full scale
  • Temperature coefficient:
    100 ppm/°C
  • Response time:
    250 ms maximum, 0 to 90%
  • Input/output isolation:
    1,600 V DC
  • Power/input/output withstand:
    1.5 kVAC for 1 minute
  • Operating temperature:
    0 to +55 °C
  • Operating humidity:
    20 to 95% RH, non-condensing
  • Construction:
    Plug-in socket with barrier terminals
  • Tariff Code:
    8537101190
  • Country of origin:
    Taiwan
  • Place of shipment:
    Xiamen,Fujian,China
By purchasing this item, you agree to the Terms & Conditions, ApterPower is not an authorized distributor for listed manufacturers or tradenames and therefore the manufacturer's warranty does not apply. All our products come with ApterPower's 1-year warranty.

More Information

Overview Manuals Input Scaling Current Output Isolation Path Field Setup

Features:

  • Converts a 0–100% potentiometer input to a 4–20 mA current output.
  • Uses an isolated KBP input/output signal path.
  • Provides switch-selected zero and span settings for field range adjustment.
POUNDFUL PF-KBP-21Q-3 places the potentiometer, excitation circuit, and current output in one plug-in transmitter.

The 21Q configuration defines the input and output ranges, while suffix 3 defines the power supply.

Only the confirmed exact-code configuration is retained; unsupported application claims are removed.

The POUNDFUL PF-KBP-21Q-3 Programmable Potentiometer Transmitter may still be available for purchase and support from Apter Power beyond End-Of-Life (EOL) by the manufacturer (OEM).
POUNDFUL PF-KBP-21Q-3 Programmable Potentiometer Transmitter Manuals,Datasheets,Link Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.

Potentiometer range setup

  • Input span: The confirmed input represents zero to one hundred percent travel.
  • Resistance selection: Switch settings adapt the input to the potentiometer resistance.
  • Zero control: The lower position is aligned with the output starting point.
  • Span control: The upper position is aligned with the output full-scale point.

4–20 mA conversion

  • Lower output: Zero-percent position is assigned to the calibrated 4 mA point.
  • Upper output: Full travel is assigned to the calibrated 20 mA point.
  • Response: The documented 0–90% response is no more than 250 ms.
  • Load path: The receiving analog input closes the current loop.

Separated signal circuits

  • Sensor side: The potentiometer and excitation path remain on the input side.
  • Output side: The 4–20 mA circuit drives the receiving device.
  • Isolation rating: The input/output barrier is rated at 1,600 V DC.
  • Withstand test: Power, input, and output withstand 1.5 kVAC for one minute.

Commissioning sequence

  • Code check: Confirm 21Q input/output and suffix 3 supply before wiring.
  • Polarity: Verify the 24 V DC and current-loop terminal polarity.
  • Calibration: Set resistance range, zero, and span with the actual potentiometer connected.
  • Final check: Move the sensor through its range and confirm both endpoint currents.
Description
POUNDFUL PF-KBP-21Q-3 is a programmable potentiometer transmitter configured for a 0–100% input, 4–20 mA output, and 24 V DC power. It converts the connected resistive position into a standard current-loop signal for a controller or indicator.

The KBP input path of POUNDFUL PF-KBP-21Q-3 is isolated from its output path. Switch-selected resistance, zero, and span settings adapt the transmitter to the connected potentiometer before the measured position is scaled across the 4–20 mA output range.

A 24 V DC auxiliary supply powers POUNDFUL PF-KBP-21Q-3 and its internal excitation circuit. The barrier-terminal socket separates potentiometer wiring, power, and output-loop connections so each circuit can be checked independently during commissioning.
Alternative Names
PFKBP21Q3 PF KBP 21Q 3 PF-KBP-21Q3 POUNDFUL PF-KBP-21Q-3 PF-KBP-21Q-3 Potentiometer Transmitter PF KBP 21Q-3 4-20mA PF-KBP-2IQ-3 PF-KBP-21O-3
Technical notes
POUNDFUL PF-KBP-21Q-3 is the isolated 0–100% potentiometer-to-4–20 mA configuration powered from 24 V DC.
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FAQS

The following is a list of questions commonly asked by our customers. Please contact us if you have a question about our process that is not answered below.
What does the 21Q code mean on POUNDFUL PF-KBP-21Q-3?
On POUNDFUL PF-KBP-21Q-3, code 21 defines the 0–100% input and Q defines the 4–20 mA current output.
How is POUNDFUL PF-KBP-21Q-3 matched to a potentiometer?
For POUNDFUL PF-KBP-21Q-3, select the resistance range and then adjust zero and span so sensor travel maps to 4–20 mA.
Why is isolation used in POUNDFUL PF-KBP-21Q-3?
The KBP construction in POUNDFUL PF-KBP-21Q-3 separates the potentiometer input from the current output to reduce direct electrical coupling.
Which supply is required by POUNDFUL PF-KBP-21Q-3?
Suffix 3 on POUNDFUL PF-KBP-21Q-3 denotes 24 V DC auxiliary power on terminals separate from the input and output circuits.
How should the POUNDFUL PF-KBP-21Q-3 barrier-terminal socket be wired?
POUNDFUL PF-KBP-21Q-3 keeps potentiometer excitation/input, auxiliary power, and 4–20 mA output on separately assigned terminals; verify polarity before insertion.
Which code elements define the installed POUNDFUL PF-KBP-21Q-3 signal path?
POUNDFUL PF-KBP-21Q-3 combines KBP isolation, a 21 input code, Q output code, and 3 auxiliary-power code in one ordering number.