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.