Go to homepage
Show all categories Products Back

A20400 Isolated Standard Signal Conditioner | Input 0(4) … 20 mA | Isolation up to 600 V | Load stop function

Product number: A20400
Description Technical details Downloads Use cases Blog posts

Description

A20400 Isolated Standard Signal Conditioner | Input 0(4) … 20 mA | Isolation up to 600 V | Load stop function

The first decoupled passive isolator with load stop function to provide protective separation of 0(4) ... 20 mA standard signals.

  • Extremely compact design
    up to 320 channels per meter
  • 1- and 2-channel versions
    cheap and flexible for a wide range of applications
  • Galvanic isolation
    between the input and output protection against incorrect measurements or damage to the equipment due to parasitic voltages
  • Protective separation up to 300 V AC/DC according to EN 61140
    to protect personnel and equipment
  • Load stop function prevents feedback
    e.g. in the case of an open output circuit
  • No power supply required
    Cost saving due to lower wiring effort no mains interference, no unnecessary self-heating and therefore maximum component service life
  • High accuracy
    No distortion of the measurement signal
  • Maximum reliability
    No repair and failure costs
  • International use
    UL / CSA approvals
  • 5-year warranty

Thanks to an extremely high packing density of up to 320 channels per meter of mounting rail and outstanding technical properties such as protective separation, these isolators leave the competition in the dust – even when it comes to the price-performance ratio!

The A20400 draws its power as a voltage drop directly from the measurement signal without falsifying it. There are no costs for a power supply and wiring. The A20400 has virtually no self-heating that would cause the electronic components to age faster. Together with a patented circuit design, this means maximum reliability. The consequence of this extraordinary long service life: 5-year warranty!

We look forward to hearing from you!
Contact Us

Technical details

Function: Transmission / Insulation of standard signals
Input: 0 ... 20 mA, 4 ... 20 mA
Output: 0 ... 20 mA, 1:1 transmission, 4 ... 20 mA
Isolation AC/DC: up to 600 V
Test Voltage: 2.5 kV AC
Power Supply: Loop powered
Cutoff Frequency: approx. 100 Hz
Ambient operating temperature: –20 … 65 °C
Dimensions (W x L x H): 6.2 x 93 x 101 mm
Special features: Excellent price-performance ratio, Extremely high component density of 320 channels per meter of mounting rail, Extremely reliable: MTBF (mean time between failures) 1031 years, The first decoupled passive isolator with load stop function (option)
Product Category: Isolated Signal Conditioner

Downloads

Manuals

[861] User Manual (DE, EN)
A204**
Version 05

Brochures

[14160] Brochure
Product Overview Interface Technology

Data Sheets

[854] A20400
Data sheet
Product Description | Specifications | Product Range

Certificates

[12611] DNV•GL Type Approval Certificate
No. TAA00000AX | 2021-04-06
Revision No: 2
A204**P0
[11555] Certificate of Compliance (UL)
No. 20181015-E220033; 2018-10-15 (ZT181016K)
POWER CIRCUIT AND MOTOR-MOUNTED APPARATUS
A204** and BL541

Software

[12154] Software (.zip)
ePLAN P8 Produktmakros
[11876] Knick Produktmakros (.pdf)
ePLAN Electric P8

Our service

Used in Process or Applications

Interface Technology
High voltage transducers and signal conditioners for the acquisition and conversion of current, voltage, temperature, speed, strain and resistance signals.
Products
High voltage transducers featuring long-term stability, transducers, and signal multipliers for advanced applications

Related Products

A21000 Isolated Standard Signal Conditioner | Input and Output 0(4) … 20 mA or 0 … 10 V | Isolation up to 300 V
A21000 Isolated Standard Signal Conditioner | Input and Output 0(4) … 20 mA or 0 … 10 V | Isolation up to 300 V
Product number:

A21000

Relevant Blog Posts

Sept 2024

Interface Technology

Hydrogen

Stack and String Voltage Measurement in Electrolyzers and Fuel Cells
Voltage, current and temperature measurement in electrolyzers with P40000 series high voltage transducers

Sept 2024

Interface Technology

New 30 mV Shunt Resistors for Knick Transducers

Knick is expanding the accessory range for its high-voltage transducers with immediate effect by adding shunt resistors with a 30 mV voltage drop
Innovations at InnoTrans 2024

Sept 2024

Interface Technology

Exhibition, InnoTrans

Innovations at InnoTrans 2024 for rolling stock and DC traction power supply
At InnoTrans 2024 Knick presents electrical measurement solutions for rolling stock and DC traction power supply applications

Dec 2023

Company

|

Interface Technology

|

Process Analytics

Knick Austria - direct customer contact in Austria from 2024
Reorganization of sales in Austria and new contacts in the field of process analytics and interface technology

May 2022

Interface Technology

Energy

Energy storage - the handshake between renewable energy and electric vehicles
Energy storage technology such as battery and hydrogen are critical for growth and continuous development of renewable energy and e-mobility.

Feb 2022

Interface Technology

P52000VPD, Voltage

P52000VPD voltage presence detector reliably detects voltages up to 4200 V DC
The new P52000VPD voltage presence detector reliably monitors areas with high voltages and sends a signal to the downstream plant control system when a specified threshold value is reached.

Sept 2021

Interface Technology

USA, Exhibition

Knick Interface at Battery and Electric & Hybrid Vehicle Technology Expo
Knick will be showcasing high-voltage electrical measurement and signal conversion products.

May 2021

Interface Technology

Quadruple Standard Signals in Just One Signal Conditioner
The A20340 can output a standard input signal to four calibrated and galvanically isolated outputs in parallel.

Apr 2021

Interface Technology

Hydrogen

Electrical measurement and process analytics for hydrogen production
Knick products optimize hydrogen production in the process and in electrolyser operation.

Mar 2021

Interface Technology

High-Voltage Transducer, USA, P44000

Condition Monitoring of High-Voltage Motors
Having an active predictive maintenance campaign in place for large rotating equipment can be a key strategy for maximizing process uptime.

Mar 2021

Interface Technology

Pulse frequency conditioner for speed sensors
The new P16000 from Knick is a pulse frequency conditioner that converts frequency signals from speed sensors into standard signals.

Nov 2020

Interface Technology

High-Voltage Transducer, Voltage, P42000D2

Worldwide smallest transducer up to ±2200 V
The P40000 series from Knick enables reliable voltage measurements from ±50 mV to ±3600 V and current measurements from ±100 mA to ±20 kA.

Aug 2020

Interface Technology

DC

Importance of broad-range power supplies for DC electrical measurement
Many DC electrical measurement products manufactured by Knick contain universal, also known as broad-range, power supplies.

Jul 2020

Interface Technology

High-Voltage Transducer, DC, P29000

Measuring Photovoltaic Degradation
Photovoltaic (PV) array degradation is an important aspect to consider for system design and installation.

Jun 2020

Interface Technology

High-Voltage Transducer, USA

Electrical Measurement Solutions: Control from 480 to 4800 Volts
Voltage and current transducers from Knick bring true control to electrical measurement applications across a wide-range of industries.

Jun 2020

Interface Technology

High-Voltage Transducer

Benefits of High Voltage Transducers versus Instrument Transformers
When a need arises to step voltage in a circuit either up or down for purposes of power transmission or distribution, there is no doubt that transformers are essential.

Nov 2019

Interface Technology

DC, USA, Current

Shunt Resistor versus Hall Effect Technology
There are many systems where measurement of large DC currents are needed for performance and safety.

Mar 2018

Interface Technology

MTBF beyond 3000 years: A snap hook for your plant
Failure of equipment on the plant floor can lead to considerable and costly disruption.

Jan 2018

Interface Technology

UL

Knick Products Comply With UL - What Does That Mean?
There are different assessments and approaches to reach an adequate level of safety. Manufacturers are typically on the “safe” side, if they comply with recognized standards.

Nov 2017

Interface Technology

High-Voltage Transducer, P50000

High-voltage transducer offers more safety on railway vehicles
The requirements placed on railway vehicles have increased significantly in recent years. Products for rolling stock need to ensure a higher level of functional safety than ever before.

Feb 2017

Interface Technology

P41000TRMS

True RMS Measurement with P41000TRMS
Traditional millivolt AC transducers are very susceptible to errors due to their poor insulation and are only designed for pure sinewave measurement.

Feb 2017

Interface Technology

P22400, SIL

Functional safety and maximum availability can go together
The requirements on operational and safety-related circuits are continuously growing.