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6DR2104-4

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Siemens 6DR2104-4 is a SIPART DR21 K-controller for 24 V UC supply, combining analog process control, front-panel configuration and modular signal or communication options.
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Technical specifications for 6DR2104-4

  • Manufacturer:
    Siemens
  • Part Number:
    6DR2104-4
  • Product Family:
    Siemens Sipart
  • Product Type:
    Process Controller
  • Stock:
    1
  • Order number:
    6DR2104-4
  • Controller family:
    SIPART DR21
  • Controller type:
    K-controller
  • Supply option:
    24 V UC
  • AC supply range:
    20 to 28 VAC
  • DC supply range:
    20 to 35 VDC
  • Standard analog inputs:
    2 x 0/4 to 20 mA
  • Analog input resistance:
    248 ohms ±1%
  • Analog output:
    0/4 to 20 mA
  • Analog output resolution:
    0.1% or better
  • Standard digital inputs:
    2 x 24 V logic
  • Standard digital outputs:
    2 x 24 V logic plus K-controller outputs
  • CPU cycle time:
    100 ms
  • A/D resolution:
    11 bits, approximately 0.06%
  • Operating temperature:
    0°C to +50°C
  • Storage temperature:
    -25°C to +75°C
  • Front protection:
    IP64
  • Housing protection:
    IP30
  • Connection protection:
    IP20
  • Protection class:
    Class I
  • Standard controller weight:
    Approximately 1.2 kg
  • Optional communication:
    RS-232/RS-485 or PROFIBUS DP module
  • Weight:
    2.646 lbs (1.2 kg)
  • Tariff Code:
    9032899090
  • Country of origin:
    Germany
  • 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 Applications Configuration Monitoring Installation

Features:

  • Uses the SIPART DR21 K-controller architecture with the -4 supply option for 24 V UC operation.
  • Provides two standard 0/4–20 mA inputs, one analog output and configurable digital interfaces.
  • Supports front-panel parameterization with optional serial or PROFIBUS DP communication modules.
The current ordering configuration is 6DR2104-4, the SIPART DR21 K-controller identified for a 24 V UC power source.

It performs closed-loop process control with configurable algorithms, setpoint handling, displays, alarms and manipulated-variable outputs in panel-mounted applications.

Before commissioning, match the supply connector, controller mode, input and output scaling, relay loads, installed option cards and saved parameter set from the original instrument.

Availability is subject to Apter Power inventory and sourcing confirmation.
Verified resources for Siemens 6DR2104-4: 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.
  • Regulates temperature, pressure, flow or level loops from standard process-current inputs and a configured manipulated-variable output.
  • Operates step-control or continuous-control final elements according to the selected K-controller structure.
  • Supports legacy panel modernization where an existing DR21 parameter set and plug-in option arrangement must be retained.
  • Online parameters can be adjusted during control operation to tune process response without rebuilding the selected controller structure.
  • Offline parameters establish display behavior, limits and safety values while the manipulated variable is held in a controlled state.
  • Structure switches select signal processing and the control algorithm, with the completed setup retained in non-volatile memory.
  • Four-digit actual-value and setpoint displays operate with two vertical LED bar graphs for continuous process observation.
  • A separate two-digit indication presents the manipulated variable, which can be adjusted from the front membrane keyboard.
  • Configurable alarms and digital outputs report limit conditions, operating states and controller events to the surrounding panel logic.
  • The front panel is rated IP64, while the housing and rear connection areas carry the lower protection levels specified for cabinet mounting.
  • Field circuits terminate on plug-in connectors, and the -4 supply version uses its dedicated two-pin 24 V UC plug.
  • Four coded rear option slots accept supported analog, digital and communication modules without changing the panel cutout.
Description
Siemens 6DR2104-4 is the 24 V UC version of the SIPART DR21 K-controller for closed-loop process control. Its front panel brings the process value, setpoint and manipulated output together through digital displays, vertical LED bars and direct operating keys. This arrangement gives panel operators a compact view of controller behavior and permits routine operating changes without requiring a separate local indicator for each principal variable.

The instrument processes configurable analog and digital signals for fixed or tracking setpoints, limit alarms, output switching and PID-based regulation. Online parameters can be adjusted while the loop remains in operation so response can be tuned to the process, whereas structural settings determine the selected controller algorithm and signal routing. Supported option modules extend analog, digital or communication functions according to the hardware fitted in the coded rear positions.

Installation uses plug-in field terminals and the dedicated two-pin auxiliary-supply connector assigned to the -4 ordering version. Before exchanging a unit, document the existing option cards, rear-slot coding, terminal assignments, display setup and retained parameter set. The replacement should be checked in a controlled state before automatic operation resumes, because matching the front-panel model alone does not reproduce the application-specific signal structure or tuning values.
Alternative Names
6DR2104-4 6DR 2104-4 6DR21044 Siemens 6DR2104-4 Siemens SIPART DR21 6DR2104-4 6DR2104-4 K-Controller Siemens 6DR2104-4 24 V UC Process Controller
Technical notes
6DR2104-4 replacement requires a complete parameter and structure-switch backup; its 24 V UC supply and K-controller output behavior must not be confused with AC-powered or S-controller variants.
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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.
Which controller behavior identifies Siemens 6DR2104-4?
It is the SIPART DR21 K-controller variant, so its manipulated-variable output structure must match the installed actuator and saved configuration.
What power connector belongs with Siemens 6DR2104-4?
The -4 supply version uses the dedicated two-pin connector for 24 V UC rather than the three-pin mains connector of the AC version.
Where is Siemens 6DR2104-4 best used in a legacy loop?
It suits panel-mounted process-control duties where the existing DR21 signals, algorithm, option modules and operator interface are retained.
How is Siemens 6DR2104-4 sourcing status handled?
Apter Power confirms the exact controller, installed options, condition, documentation and delivery terms at quotation.
What must be migrated before replacing Siemens 6DR2104-4?
Capture online and offline parameters, structure switches, alarm limits, display ranges, option cards and every terminal assignment.
Which records produce an accurate Siemens 6DR2104-4 offer?
Send the nameplate, rear option inventory, supply voltage, terminal photographs, saved settings, panel application and requested quantity.

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