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- Siemens
- 6DD1682-0CH3
- VMEbus Rack
- Germany
- 482.6 × 354.9 × 343 mm
- 20.5 kg
- Xiamen, China
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Product Overview
The Siemens 6DD1682-0CH3 is the UR6021 rack used in the SIMATIC TDC high-performance automation system. It provides a mechanical and electrical platform for installing up to 21 control and communication modules through a VMEbus-based backplane architecture.
The UR6021 rack incorporates an integrated system power supply and a fan tray for forced-air cooling. Its 21-slot configuration accommodates different SIMATIC TDC processor, communication, and I/O modules, allowing the system hardware to be arranged according to the control application’s requirements.
The rack also features eight P0 slots and supports GDM five-tier plug-in connectors. Replaceable fans simplify maintenance of the cooling assembly without requiring the entire rack to be replaced.
The integrated power supply distributes several DC voltage levels to the installed modules, including +5 V, +3.3 V, +12 V, and -12 V. The available output current depends on the selected voltage rail and the overall system power budget. The total continuous power consumption must not exceed 600 W at 60°C.
The 6DD1682-0CH3 is suitable for large industrial control installations where multiple processing and interface modules must operate within one coordinated SIMATIC TDC hardware platform.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model | 6DD1682-0CH3 |
| Product Series | SIMATIC TDC |
| Product Type | Rack |
| Rack Designation | UR6021 |
| Bus Architecture | VMEbus |
| Number of Slots | 21 |
| Number of P0 Slots | 8 |
| Connector Compatibility | GDM 5-Tier Plug-In Connector |
| Cooling System | Integrated Fan Tray |
| Fan Type | Replaceable Fans |
| Power Supply | Integrated System Power Supply |
| Rated AC Input Voltage | 120–230 V AC |
| Permissible AC Input Voltage | 85–264 V AC |
| Rated DC Input Voltage | 110–220 V DC |
| Permissible DC Input Voltage | 93.5–253 V DC |
| Power Supply Output Voltage | +5 V, +3.3 V, +12 V, -12 V |
| Maximum Total Continuous Power | 600 W at 60°C |
| +5 V Output Current | 120 A Total |
| +3.3 V Output Current | 60 A Total |
| +12 V Output Current | 17 A Total |
| -12 V Output Current | 17 A Total |
| Power Failure Backup | Minimum 20 ms |
| Signaling Relays | 3 |
| Relay Contact Rated Voltage | 230 V AC |
| Relay Contact Rated Current | 2 A |
| Protection Rating | IP20 |
| Protection Class | Class I |
| Operating Temperature | 0 to +60°C |
| Storage Temperature | -40 to +70°C |
| Relative Humidity | 5–95%, Non-Condensing |
| Dimensions | 482.6 × 354.9 × 343 mm |
| Weight | 20.5 kg |
Product Features
- 21-Slot Rack Architecture: Provides 21 installation positions for SIMATIC TDC processor, communication, and I/O modules.
- VMEbus Backplane: Supports data exchange between installed control modules through the rack’s internal bus architecture.
- Integrated Power Supply: Distributes multiple DC voltage levels to the installed modules.
- Eight P0 Slots: Provides eight P0 connection positions for compatible hardware configurations.
- Replaceable Fan Assembly: Uses replaceable fans to support maintenance of the rack cooling system.
- Forced-Air Cooling: Maintains airflow through the installed modules during continuous operation.
- GDM Connector Compatibility: Supports GDM five-tier plug-in connector arrangements.
- Integrated Signaling Relays: Provides relay contacts for external evaluation of rack operating conditions.
- Multiple Input Power Options: Supports specified AC and DC supply voltage ranges.
- System Power Monitoring: Includes power and fault indication functions for monitoring rack operating conditions.
Product Working Principle
The Siemens 6DD1682-0CH3 functions as the central hardware platform for a SIMATIC TDC control system. Its operation involves three main functions: module interconnection, power distribution, and thermal management.
1. Module Interconnection
The rack provides 21 module positions connected through its internal VMEbus backplane. When compatible processor, communication, and I/O modules are installed, the backplane provides the electrical connections required for communication between the different hardware components.
The VMEbus architecture supports high-speed data exchange between the installed modules, allowing processing and communication tasks to operate within the same control system.
2. Power Distribution
The integrated power supply converts the incoming AC or DC supply into the DC voltage rails required by the installed modules.
The available output voltages include:
- +5 V DC
- +3.3 V DC
- +12 V DC
- -12 V DC
Each voltage rail has a specified current capacity. The actual power available to the installed modules depends on the rack configuration and must remain within the maximum continuous power budget of 600 W at 60°C.
3. Thermal Management
The integrated fan tray generates forced airflow through the rack to remove heat produced by the installed electronics and power supply.
The replaceable fan arrangement allows maintenance personnel to service the cooling assembly when necessary. Fan failure and system operating conditions are also monitored through the rack’s signaling and indication functions.
Together, these functions allow the UR6021 to provide a common hardware environment for SIMATIC TDC control operations.
Role in Siemens SIMATIC TDC Control Architecture
Within a SIMATIC TDC installation, the 6DD1682-0CH3 serves as the central rack infrastructure connecting the different control-system modules.
The rack does not independently execute the application control program. Instead, it provides the mechanical mounting, electrical power, and VMEbus connections required by the installed processor and interface modules.
A typical system arrangement is:
SIMATIC TDC Rack UR6021 → CPU Modules → Communication Modules → I/O Modules → Industrial Field Equipment
| System Component | Function |
|---|---|
| 6DD1682-0CH3 UR6021 | Provides rack mounting, backplane connections, power distribution, and cooling |
| SIMATIC TDC CPU Modules | Execute control algorithms and application logic |
| Communication Modules | Handle data exchange with external automation networks |
| I/O Modules | Interface with digital and analog field signals |
| VMEbus Backplane | Provides internal communication between installed modules |
| Integrated Power Supply | Supplies the required DC voltage rails |
| Fan Tray 6DD1683-0CH3 | Provides forced-air cooling |
| External Field Devices | Supply process signals and receive control commands |
The rack’s 21-slot arrangement allows different hardware configurations to be assembled according to the processing, communication, and I/O requirements of the installation.
Industrial Applications
The UR6021 rack is suitable for demanding industrial automation systems requiring multiple coordinated control modules and centralized hardware infrastructure.
| Industrial Application | Typical Use |
|---|---|
| Power Generation | Centralized control of generation and auxiliary systems |
| Power Distribution | Coordinating protection and control equipment |
| Steel Manufacturing | High-speed process and equipment control |
| Metallurgy | Managing complex production processes |
| Chemical Processing | Coordinating distributed process-control functions |
| Oil and Gas | Supporting large-scale industrial control systems |
| Turbomachinery | Integrating processor and communication modules |
| Heavy Manufacturing | Coordinating multiple machine-control functions |
| Industrial Process Automation | Integrating processing and I/O hardware |
| Large-Scale Control Systems | Providing a common rack platform for multiple control modules |
Installation and Maintenance
- Verify the Rack Model: Confirm that 6DD1682-0CH3 corresponds to the required UR6021 rack configuration.
- Check Cabinet Compatibility: Ensure that the cabinet and mounting arrangement provide sufficient clearance for the rack and its cooling airflow.
- Inspect the Rack: Check the chassis, backplane connectors, power supply, and fan tray for visible damage.
- Verify Input Power: Confirm that the available AC or DC supply falls within the specified input voltage range.
- Check Grounding: Connect the protective earth conductor to the designated grounding point before energizing the rack.
- Inspect the Backplane: Check the VMEbus connections and module slots for contamination, damaged contacts, or foreign objects.
- Verify Module Placement: Install compatible SIMATIC TDC modules in their designated positions according to the system configuration.
- Check Power Budget: Calculate the combined current consumption of the installed modules and ensure that the total continuous power remains within the 600 W limit at 60°C.
- Inspect Fan Operation: Verify that the integrated fans operate correctly and that airflow is not obstructed.
- Check Signaling Relays: Verify the operation of the POWER, SYSFAIL, and FAN FAIL signaling circuits during commissioning.
- Perform Initial Power-Up: Energize the rack according to the Siemens commissioning procedure and inspect the power and fault indicators.
- Schedule Preventive Maintenance: Periodically inspect the cooling assembly, electrical connections, grounding, and power supply condition. Replace defective fans using the specified maintenance procedure.
Compatible System Components
| Component | Function |
|---|---|
| Siemens 6DD1682-0CH3 | SIMATIC TDC UR6021 21-Slot Rack |
| Siemens 6DD1683-0CH3 | Replaceable Fan Tray |
| Siemens SIMATIC TDC CPU Modules | Central Processing and Control |
| Siemens SIMATIC TDC Communication Modules | Industrial Network Communication |
| Siemens SIMATIC TDC I/O Modules | Digital and Analog Signal Processing |
| Siemens GDM 5-Tier Plug-In Connector | Rack Module Connection |
| Siemens VMEbus Modules | Internal System Communication |
Recommended Related Models
| Model / Product | Product Type | Typical Application |
|---|---|---|
| Siemens 6DD1682-0CH2 | SIMATIC TDC UR5213 Rack | TDC system rack installation |
| Siemens 6DD1682-0CH0 | SIMATIC TDC UR5213 Rack | TDC system hardware installation |
| Siemens 6DD1683-0CH3 | SIMATIC TDC Fan Tray | Rack cooling and fan replacement |
| Siemens 6DD1681-0AJ1 | SIMATIC TDC CPU Module | Central control processing |
| Siemens 6DD1681-0GK0 | SIMATIC TDC CPU Module | TDC processing applications |
| Siemens 6DD1681-0EH1 | SIMATIC TDC Communication Module | Industrial system communication |
Key Advantages
- 21-slot VMEbus rack architecture.
- Integrated multi-voltage system power supply.
- Eight P0 slots for compatible hardware arrangements.
- Replaceable fan tray for simplified cooling maintenance.
- Three integrated signaling relays.
- Supports both AC and DC input power configurations.
- Designed for SIMATIC TDC processor and I/O integration.
- Supports high-density industrial control system configurations.
Technical FAQs
1. What is the difference between the UR6021 and UR5213 racks?
The UR6021 is the 21-slot SIMATIC TDC rack identified by 6DD1682-0CH3, featuring eight P0 slots and a specific GDM five-tier connector arrangement. The UR5213 models have their own hardware configurations and should not be treated as direct mechanical equivalents without checking the installed module and connector requirements.
2. What power supply voltages are available from the 6DD1682-0CH3?
The integrated power supply provides +5 V, +3.3 V, +12 V, and -12 V DC outputs. The available current depends on the voltage rail, and the total continuous power consumption must not exceed 600 W at 60°C.
3. Can the fan tray of the UR6021 rack be replaced separately?
Yes. The fan tray is available as a separate spare part under Siemens part number 6DD1683-0CH3. Replacement should be carried out by qualified personnel following the applicable maintenance procedure.
4. What should be checked when installing additional modules in the UR6021?
Check the module’s mechanical compatibility, VMEbus connection requirements, power consumption, and cooling requirements. The combined module load must remain within the rack’s power supply limits, particularly the 600 W continuous power budget at 60°C.