Beckhoff KS4012 Bus Terminal

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Manufacturer: BECKHOFF
Product No.: KS4012
Country of origin:Niemcy
Product Type: Bus Terminals
Payment: T/T, Western Union
Weight: 80g
Dimensions: 6.8 cm x 1.2 cm x 10.0 cm
Shipping port: Xiamen
Warranty: 12 months

Description

Process control and automation networks requiring precise analog current loop signals utilize the Beckhoff KS4012 analog output terminal to interface with industrial actuators. This 2-channel analog output module delivers accurate signals in the range of 0 to 20 mA with a high-accuracy conversion resolution of 12 bits. The KS-series configuration features a pluggable wiring level, enabling rapid block installation, simplified maintenance, and field-pre-wiring without disconnecting individual signal lines. The module processes electrical analog current signals dynamically by converting digital values from the K-bus backplane with galvanic isolation, ensuring signal integrity in electrically noisy industrial environments.

Features

Two-channel analog outputs configured for standard 0 to 20 mA current loops.
High-resolution 12-bit digital-to-analog signal conversion.
Pluggable connection level (KS series design) for tool-free terminal replacement.
Galvanic isolation of 500 V between the K-bus and the analog process loop.
Compact 12 mm DIN rail housing to minimize control cabinet footprint.
Automatic data transfer across the K-bus with no address configuration required.

Applications

Proportional control valves and pneumatic actuators.
Speed references for variable frequency drives (VFD) and motor controllers.
Current-loop signal transmission in municipal water and wastewater systems.
Process heating loops and environmental chamber control.

Technical Specifications

Manufacturer	Beckhoff Automation
Part Number / Model	KS4012
Technology	Single-ended
Number of Outputs	2
Power Supply	24 V DC via power contacts (alternative 15 V DC with power supply terminal KL9515)
Signal Current Range	0 to 20 mA
Load Resistance	Less than 500 Ohm
Output Error	Less than +/-0.1 % (relative to full scale end value)
Resolution	12 bit
Conversion Time	Approx. 1.5 ms
Electrical Isolation	500 V (K-bus / signal voltage)
Current Consumption (Power Contacts)	Typ. 50 mA + load
Current Consumption (K-bus)	Typ. 60 mA
Process Image Bit Width	Output: 2 x 16 bit data (2 x 8 bit control/status optional)
Operating Temperature	-25 to +60 degC
Storage Temperature	-40 to +85 degC
Relative Humidity	95 %, no condensation
Vibration and 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
Protection Rating	IP20
Installation Position	Variable
Housing Material	Polycarbonate
Dimensions (L x W x H)	6.8 cm x 1.2 cm x 10.0 cm
Weight	0.08 kg

Connections and Interfaces

Connection Parametric	Specification / Range
Connection Technology	Pluggable spring actuation by screwdriver
Solid Wire Cross-Section (s)	0.08 to 1.5 mm² (AWG 28 to 16)
Stranded Wire Cross-Section (st)	0.08 to 1.5 mm² (AWG 28 to 16)
Flexible Wire Cross-Section (f)	0.14 to 1.5 mm² (AWG 26 to 16)
Stripping Length	9 to 10 mm
Power Contacts Current Load	Imax: 10 A

Installation Guidelines

Mount the module onto a standard 35 mm DIN rail conforming to EN 60715. Use the integrated double slot and key lock for alignment with adjacent terminals.
Ensure the pluggable wiring level is fully clicked into position before applying field power.
Observe standard grounding practices for shielded current loop cabling to minimize high-frequency EMI.
Ensure a suitable IP54 minimum enclosure rating when installing within ATEX-certified Zone 2 hazardous areas.

Compliance and Certifications

CE
UL
ATEX: II 3 G Ex nA IIC T4 Gc
DNVGL

Key Features:

What is the key advantage of the KS4012 compared to the KL4012?

The KS4012 features a pluggable wiring connection level, allowing the terminal blocks to be quickly removed for maintenance without rewiring, whereas the KL4012 uses standard fixed terminals.

Does the KS4012 require manual address configurations?

No, the KS4012 requires no address or manual DIP switch configurations; it automatically maps its process image parameters via the K-bus backplane.

Can I power the KS4012 with a 15 V DC source?

Yes, while the standard power supply is 24 V DC via the power contacts, the KS4012 can be alternatively supplied with 15 V DC using a KL9515 power supply terminal.

What standard environmental protection rating does the KS4012 have?

The terminal is rated at IP20 and should be installed within a control cabinet or protective enclosure.

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TECHNICAL SPECIFICATIONS

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Beckhoff KS4012 Bus Terminal