KS3122

BECKHOFF

BECKHOFF KS3122 Bus Terminal

SKU KS3122

In stock
  • 12-month warranty
  • Free returns within 30 days
  • Manufacturer: BECKHOFF
  • Product No.: KS3122
  • Origin Germany
  • Product Type: Bus Terminals
  • Payment: T/T, Western Union
  • Weight: 0.07 kg
  • Dimensions: 12 mm x 100 mm x 68 mm
  • Shipping port: Xiamen
  • Warranty: 12 months

Tags

Analog Input Terminals Bus Terminals
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Product Description

Description

The BECKHOFF KS3122 is a high-performance, 2-channel analog input Bus Terminal designed to acquire differential signals in the range of 4 to 20 mA. Engineered for precision integration within K-bus networks, this terminal features a pluggable wiring level that distinguishes the KS series from standard fixed-wire KL modules. This design enables quick installation, pre-wiring, and hassle-free maintenance by allowing the terminal housing to be removed without disconnecting the field wiring.

With an internal differential input structure, the BECKHOFF KS3122 offers exceptional noise rejection and signal stability in electrically noisy environments. It delivers a default resolution of 15 bits, which can be configured up to 16 bits for high-resolution measurement applications. This level of precision, combined with configurable filters and conversion times, makes it a reliable choice for monitoring process variables such as pressure, temperature, and flow across a wide variety of industrial field sensors.

Features

  • Two differential analog input channels optimized for 4 to 20 mA signal current.
  • Pluggable connection technology (KS series) for simplified field service and rapid replacement.
  • Highly precise 15-bit resolution, configurable up to 16 bits.
  • Configurable conversion times down to 2 ms (140 ms default).
  • Integrated configurable 50 Hz filter for reliable noise suppression.
  • Galvanic electrical isolation of 500 V between the K-bus and the signal electronics.
  • Compact, space-saving housing designed for 35 mm DIN-rail mounting.

Applications

  • Process control and automation requiring analog current loop feedback.
  • Integration of current transmitters, flow meters, and pressure transducers.
  • Differential current measurement in environments prone to common-mode electrical noise.
  • Modular control systems where pluggable wiring decreases commissioning and maintenance times.

Technical Specifications

General

Parameter Specification
Manufacturer BECKHOFF
Exact Model KS3122
Product Type Analog Input Bus Terminal
Design Form Terminal housing with pluggable wiring level
Material Polycarbonate
Installation 35 mm DIN rail (conforming to EN 60715) with lock
Side-by-Side Mounting Double slot and key connection

Signal and Electrical Specifications

Parameter Specification
Number of Inputs 2
Signal Current 4 to 20 mA
Input Technology Differential input
Internal Resistance typ. 50 Ohm shunt, load: 60 Ohm + diode voltage
Common-Mode Voltage (Ucm) max. 35 V
Surge Voltage Resistance 35 V DC
Power Supply Via the K-bus
Current Consumption K-bus typ. 60 mA
Current Consumption Power Contacts No power contacts
Electrical Isolation 500 V (K-bus / signal voltage)

Performance and Configuration

Parameter Specification
Resolution 15 bit (configurable to 16 bit)
Conversion Time 140 ms (configurable to 2 ms)
Filter 50 Hz (configurable)
Measuring Error < ±0.3% (relative to full scale value)
Bit Width in Process Image Input: 2 x 16-bit data (2 x 8-bit control/status optional)
Configuration No address or configuration setting required (via TwinCAT)

Connection and Wiring

Parameter Specification
Wiring Technology Pluggable spring-actuation via screwdriver
Conductor Cross-Section (Solid) 0.08 to 1.5 mm² (AWG 28 to 16)
Conductor Cross-Section (Stranded) 0.08 to 1.5 mm² (AWG 28 to 16)
Conductor Cross-Section (Flexible) 0.14 to 1.5 mm² (AWG 26 to 16)
Stripping Length 9 to 10 mm
Current Load Power Contacts (Imax) 10 A

Mechanical and Environmental

Parameter Specification
Dimensions (W x H x D) 12 mm x 100 mm x 68 mm
Weight approx. 70 g (0.07 kg)
Operating Temperature 0 to +55 degC
Storage Temperature -25 to +85 degC
Relative Humidity 95%, no condensation
Protection Rating IP20
Installation Position Variable
Vibration/Shock Resistance Conforms to EN 60068-2-6 / EN 60068-2-27
EMC Immunity/Emission Conforms to EN 61000-6-2 / EN 61000-6-4

Installation Guidelines

  1. Power De-energization: Ensure the entire K-bus system and any external field power supplies are completely powered off before installing, removing, or wiring the terminal.
  2. DIN Rail Mounting: Position the terminal on a standard 35 mm DIN rail conforming to EN 60715 and slide it until the lock mechanism clicks securely into place.
  3. Terminal Connection: Align and slide the double slot and key connections of adjacent terminals together to build a robust physical assembly.
  4. Pluggable Wiring level: Leverage the pluggable wiring capability of the KS3122. Ensure the terminal housing is properly seated onto the pluggable base. Wire the spring clamps using a standard slot screwdriver, stripping the wire ends 9 to 10 mm.
  5. Shielding and Grounding: Maintain proper electromagnetic immunity by implementing appropriate shielding for analog current-loop sensor cabling, and ground according to local standards.

Compliance and Certifications

The BECKHOFF KS3122 is compliant with international standards and holds the following markings:

  • CE: Conforms to relevant European directives.
  • UL: UL listed for safety.
  • ATEX Ex Marking: II 3 G Ex nA IIC T4 Gc (Approved for use in hazardous zone 2 locations).
Shipping &amp; Returns

Global Express Shipping

  • Standard Delivery: 4–6 business days via DHL, FedEx, and UPS.
  • Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
  • Worldwide Coverage: Serving over 150 countries.

Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our technical warranty.
FAQ
What is the main advantage of the BECKHOFF KS3122 compared to the standard KL3122?
The BECKHOFF KS3122 features a pluggable wiring level, which allows the terminal housing to be pulled out and replaced without disconnecting the actual field-side wiring, reducing downtime and maintenance complexity compared to the fixed-wire KL3122.
How many channels does the BECKHOFF KS3122 have, and what signals does it accept?
The BECKHOFF KS3122 has two analog input channels designed to process differential signal currents in the 4 to 20 mA range.
What is the default measurement resolution of the BECKHOFF KS3122, and can it be adjusted?
The BECKHOFF KS3122 offers a default measurement resolution of 15 bits, which can be configured to 16 bits via software to suit more demanding applications.
Does the BECKHOFF KS3122 require separate power contacts for field-side supply?
No, the BECKHOFF KS3122 does not have power contacts and is powered entirely via the K-bus interface with a typical current consumption of 60 mA.
Is the BECKHOFF KS3122 certified for use in hazardous areas?
Yes, the BECKHOFF KS3122 is ATEX certified with the marking II 3 G Ex nA IIC T4 Gc, making it suitable for Zone 2 hazardous areas.
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KS3122

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BECKHOFF KS3122 Bus Terminal

Only 10 item(s) left in stock

  • Manufacturer: BECKHOFF

  • Product No.: KS3122

  • Country of origin:Germany

  • Product Type: Bus Terminals

  • Payment: T/T, Western Union

  • Weight: 70g

  • Dimensions: 12 mm x 100 mm x 68 mm

  • Shipping port: Xiamen

  • Warranty: 12 months

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Product Description
FAQ
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Additional details
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Description

The BECKHOFF KS3122 is a high-performance, 2-channel analog input Bus Terminal designed to acquire differential signals in the range of 4 to 20 mA. Engineered for precision integration within K-bus networks, this terminal features a pluggable wiring level that distinguishes the KS series from standard fixed-wire KL modules. This design enables quick installation, pre-wiring, and hassle-free maintenance by allowing the terminal housing to be removed without disconnecting the field wiring.

With an internal differential input structure, the BECKHOFF KS3122 offers exceptional noise rejection and signal stability in electrically noisy environments. It delivers a default resolution of 15 bits, which can be configured up to 16 bits for high-resolution measurement applications. This level of precision, combined with configurable filters and conversion times, makes it a reliable choice for monitoring process variables such as pressure, temperature, and flow across a wide variety of industrial field sensors.

Features

  • Two differential analog input channels optimized for 4 to 20 mA signal current.
  • Pluggable connection technology (KS series) for simplified field service and rapid replacement.
  • Highly precise 15-bit resolution, configurable up to 16 bits.
  • Configurable conversion times down to 2 ms (140 ms default).
  • Integrated configurable 50 Hz filter for reliable noise suppression.
  • Galvanic electrical isolation of 500 V between the K-bus and the signal electronics.
  • Compact, space-saving housing designed for 35 mm DIN-rail mounting.

Applications

  • Process control and automation requiring analog current loop feedback.
  • Integration of current transmitters, flow meters, and pressure transducers.
  • Differential current measurement in environments prone to common-mode electrical noise.
  • Modular control systems where pluggable wiring decreases commissioning and maintenance times.

Technical Specifications

General

Parameter Specification
Manufacturer BECKHOFF
Exact Model KS3122
Product Type Analog Input Bus Terminal
Design Form Terminal housing with pluggable wiring level
Material Polycarbonate
Installation 35 mm DIN rail (conforming to EN 60715) with lock
Side-by-Side Mounting Double slot and key connection

Signal and Electrical Specifications

Parameter Specification
Number of Inputs 2
Signal Current 4 to 20 mA
Input Technology Differential input
Internal Resistance typ. 50 Ohm shunt, load: 60 Ohm + diode voltage
Common-Mode Voltage (Ucm) max. 35 V
Surge Voltage Resistance 35 V DC
Power Supply Via the K-bus
Current Consumption K-bus typ. 60 mA
Current Consumption Power Contacts No power contacts
Electrical Isolation 500 V (K-bus / signal voltage)

Performance and Configuration

Parameter Specification
Resolution 15 bit (configurable to 16 bit)
Conversion Time 140 ms (configurable to 2 ms)
Filter 50 Hz (configurable)
Measuring Error < ±0.3% (relative to full scale value)
Bit Width in Process Image Input: 2 x 16-bit data (2 x 8-bit control/status optional)
Configuration No address or configuration setting required (via TwinCAT)

Connection and Wiring

Parameter Specification
Wiring Technology Pluggable spring-actuation via screwdriver
Conductor Cross-Section (Solid) 0.08 to 1.5 mm² (AWG 28 to 16)
Conductor Cross-Section (Stranded) 0.08 to 1.5 mm² (AWG 28 to 16)
Conductor Cross-Section (Flexible) 0.14 to 1.5 mm² (AWG 26 to 16)
Stripping Length 9 to 10 mm
Current Load Power Contacts (Imax) 10 A

Mechanical and Environmental

Parameter Specification
Dimensions (W x H x D) 12 mm x 100 mm x 68 mm
Weight approx. 70 g (0.07 kg)
Operating Temperature 0 to +55 degC
Storage Temperature -25 to +85 degC
Relative Humidity 95%, no condensation
Protection Rating IP20
Installation Position Variable
Vibration/Shock Resistance Conforms to EN 60068-2-6 / EN 60068-2-27
EMC Immunity/Emission Conforms to EN 61000-6-2 / EN 61000-6-4

Installation Guidelines

  1. Power De-energization: Ensure the entire K-bus system and any external field power supplies are completely powered off before installing, removing, or wiring the terminal.
  2. DIN Rail Mounting: Position the terminal on a standard 35 mm DIN rail conforming to EN 60715 and slide it until the lock mechanism clicks securely into place.
  3. Terminal Connection: Align and slide the double slot and key connections of adjacent terminals together to build a robust physical assembly.
  4. Pluggable Wiring level: Leverage the pluggable wiring capability of the KS3122. Ensure the terminal housing is properly seated onto the pluggable base. Wire the spring clamps using a standard slot screwdriver, stripping the wire ends 9 to 10 mm.
  5. Shielding and Grounding: Maintain proper electromagnetic immunity by implementing appropriate shielding for analog current-loop sensor cabling, and ground according to local standards.

Compliance and Certifications

The BECKHOFF KS3122 is compliant with international standards and holds the following markings:

  • CE: Conforms to relevant European directives.
  • UL: UL listed for safety.
  • ATEX Ex Marking: II 3 G Ex nA IIC T4 Gc (Approved for use in hazardous zone 2 locations).
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Key Features:
#Analog Input Terminals #Bus Terminals

What is the main advantage of the BECKHOFF KS3122 compared to the standard KL3122?
The BECKHOFF KS3122 features a pluggable wiring level, which allows the terminal housing to be pulled out and replaced without disconnecting the actual field-side wiring, reducing downtime and maintenance complexity compared to the fixed-wire KL3122.

How many channels does the BECKHOFF KS3122 have, and what signals does it accept?
The BECKHOFF KS3122 has two analog input channels designed to process differential signal currents in the 4 to 20 mA range.

What is the default measurement resolution of the BECKHOFF KS3122, and can it be adjusted?
The BECKHOFF KS3122 offers a default measurement resolution of 15 bits, which can be configured to 16 bits via software to suit more demanding applications.

Does the BECKHOFF KS3122 require separate power contacts for field-side supply?
No, the BECKHOFF KS3122 does not have power contacts and is powered entirely via the K-bus interface with a typical current consumption of 60 mA.

Is the BECKHOFF KS3122 certified for use in hazardous areas?
Yes, the BECKHOFF KS3122 is ATEX certified with the marking II 3 G Ex nA IIC T4 Gc, making it suitable for Zone 2 hazardous areas.

Global Express Shipping

  • Standard Delivery: 4-6 Business Days via DHL, FedEx, and UPS.
  • Express Dispatch: Same-day dispatch for in-stock orders placed before 2:00 PM (GMT+8).
  • Worldwide Coverage: Serving over 150 countries, including rapid delivery to Saudi Arabia and UAE.

Returns & Warranty

  • 30-Day Guarantee: Returns accepted for in-stock products in original, factory-sealed packaging.
  • 12-Month Warranty: Every industrial component is backed by our professional technical warranty.

Orders are processed and delivered Monday-Friday (excluding public holidays).


For full eligibility, restocking fees, and international return details, please view our official Refund & Return Policy .

TECHNICAL SPECIFICATIONS

Country of origin
Germany

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