The Siemens 6DR2803-8C functions as a plug-in optional module within the SIPART DR positioner family. This accessory expands the positioner’s capabilities by adding extra input and output channels. Users can easily install this module without complex rewiring or special tools.
Technical Specifications
| Parameter | Specification |
|---|---|
| Product Type | Plug-in optional module |
| Compatibility | SIPART DR positioner series |
| Dimensions (W x H x D) | 55 x 75 x 30 mm |
| Weight | 0.3 kg |
| Analog Inputs | 2 x 0/4–20 mA (configurable) |
| Analog Outputs | 2 x 0/4–20 mA |
| Digital Inputs | 2 x 24V DC |
| Digital Outputs | 3 x mechanical limit switches |
| Switch Rating | 250V AC / 3A per contact |
| Electrical Isolation | 1500V AC (1 minute) |
| Operating Temperature | -30°C to +85°C |
| Storage Temperature | -40°C to +90°C |
| Protection Class | IP20 (module housing) |
| Internal Component Count | 1 x microprocessor, 4 x optocouplers, 6 x relays |
| Terminal Type | Spring-cage connectors (12 positions) |
| Power Consumption | < 2W from positioner backplane |
| Approvals | ATEX, IECEx, FM (pending configuration) |
Expanded I/O Capabilities for Flexible Applications
The Siemens 6DR2803-8C provides two configurable analog inputs for 0–20 mA or 4–20 mA signals. These inputs allow the positioner to process external process variables like pressure or temperature. Two analog outputs transmit position feedback or other parameters to a control system. Three mechanical limit switches offer reliable digital outputs for end-position indication or alarm signaling.
Robust Electrical Isolation and Safety Features
Galvanic isolation of 1500V AC separates the module’s circuits from the positioner’s internal electronics. This isolation prevents ground loops and protects against transient voltage spikes. Four optocouplers provide safe signal transfer between the digital inputs and the microprocessor. Six relays drive the limit switch outputs with a 3A switching capacity at 250V AC.
Compact Mechanical Design for Easy Installation
The module measures only 55 x 75 x 30 mm and weighs just 0.3 kg. This compact footprint allows installation even in crowded control cabinets with limited space. Spring-cage connectors accept solid or stranded wires from 0.2 mm² to 2.5 mm² for secure terminations. Users can plug the module directly into the positioner’s expansion slot without any tools. The IP20 housing provides adequate protection for standard industrial environments.
Low Power Consumption and Wide Temperature Range
The Siemens 6DR2803-8C consumes less than 2W of power from the positioner backplane. This minimal draw does not affect the positioner’s overall power budget. The module operates reliably across a -30°C to +85°C temperature range. This wide tolerance makes the unit suitable for both indoor and outdoor valve installations. Storage temperatures from -40°C to +90°C ensure long shelf life before deployment.
Compliance and Certification
This optional module carries ATEX, IECEx, and FM approvals for use in potentially explosive atmospheres. The approval status depends on the specific positioner configuration and installation environment. Users should verify the certification level matches their application requirements.
Details
| Weight | 1.2 kg |
|---|---|
| Dimensions | 50 × 290 × 217 mm |
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