Overview
The Siemens 6EP1961-2BA11 SITOP PSE200U selectivity module is a 4-channel current distribution and monitoring device designed for 24V DC power supply systems. This module distributes load current among several branches and detects faults caused by overload or short circuits, selectively switching off faulty channels while keeping remaining paths operational. This selective protection prevents complete system shutdown and minimizes downtime in critical automation applications.
Key Features
- 4-channel input rated at 24V DC / 12A total; output of 24V DC / 4×3A with adjustable threshold of 0.5–3A per channel
- Detects and isolates faults from overload or short circuits; remaining load paths remain unaffected
- Output current can be measured via voltage at measuring point “MP”—1V corresponds to 1A of output current
- Group alarm contact signaling or single-channel status output with serial code for PLC integration
- Electronic overload shutdown with automatic reset after typical wait time of 20 seconds
- Compatible with SIMATIC S7-1500/1200/300/400 and SIMOTION CPUs; function blocks available free of charge
Technical Specifications
- Input Voltage: 24V DC
- Input Current: 12A maximum
- Output: 24V DC / 4 channels × 3A (adjustable 0.5–3A per channel)
- Threshold Adjustment Range: 0.5–3A
- Number of Channels: 4
- Common Signaling Contact: Yes (floating relay, NO contact, 24V/0.5A)
- Operating Temperature: –10°C to +60°C (typical)
- Installation: DIN rail mount (standard TS 35)
- Overload Reset: Automatic, ~20s typical
Typical Applications
- Industrial control systems requiring selective output protection
- 24V distributed power branches in machinery and production lines
- PLC I/O module and sensor power distribution with fault isolation
- Emergency lighting and safety circuits requiring branch-level monitoring
- Redundancy and selectivity modules in SITOP PSE200U power supply chains
- Systems requiring rapid fault diagnosis and minimal downtime
Compatibility & Replacements
Compatible With
- Siemens SITOP PSE200U 24V DC power supplies
- SIMATIC S7-1500 / S7-1200 / S7-300 / S7-400 PLCs
- SIMOTION motion controllers
- 24V DC industrial automation systems with branch current monitoring
- DIN rail mounting systems (TS 35 standard)
Replaces / Drop-In Replacement For
- Earlier SITOP PSE200U selectivity modules (within same current rating)
- Direct replacement in SITOP power supply redundancy configurations
- Verify compatibility with your system integrator before ordering
Works With
- SIMATIC S7 PLC function blocks (free from Siemens)
- 24V DC signaling and monitoring circuits
- Serial status output for PLC digital inputs
- Group alarm contact for centralized monitoring
