Overview
The Siemens 6EP1961-2BA11 SITOP PSE200U 3 A selectivity module is a 4-channel DC power distribution unit designed for use with 24 V DC power supplies. This module electronically monitors and distributes 24 V DC power to multiple load circuits, with each channel independently switchable during overload or short-circuit conditions. The unit features a common signaling contact (relay) for integration into automation and control systems, supporting system availability by isolating faulty circuits without affecting operational branches.
Key Features
- 4-Channel Independent Monitoring: Four independently monitored output channels with adjustable current thresholds allow selective shutdown during overload conditions
- Adjustable Current Thresholds: Threshold value adjustable 0.5–3 A per channel
- Status Indication: Three colour LEDs on each channel provide clear operating and fault status
- Remote Reset Capability: Remote reset function support integration into DC power distribution and control systems
- DIN Rail Mounting: Compact design for standard industrial enclosure installation
Technical Specifications
- Input Voltage Range: 22 … 30 V DC (nominal 24 V)
- Overvoltage Resistance: 35 V
- Output Configuration: 4-channel input: 24 V DC/12 A, output: 24 V DC/4× 3 A
- Adjustable Thresholds: 0.5–3 A per channel
- Signaling Contact: Floating relay contact (NO contact), contact rating: 24 V/0.5 A
- Reset Behavior: Output automatically shut down due to overload or external overvoltage; typical wait time of 20 seconds for reactivation after shutdown
- Dimensions: 72 × 80 × 72 mm (DIN rail mount)
- Weight: Approximately 0.2 kg
- Protection Rating: IP20
- Certifications: CE marked, meets relevant EMC and safety standards
Typical Applications
The SITOP PSE200U selectivity modules are used in combination with 24V power supplies for distributing the load current among several current branches and for monitoring individual partial currents. Faults caused by overload or short circuits in individual branches are detected and selectively switched off so that remaining load current paths remain unaffected, achieving rapid fault diagnosis and minimizing downtimes.
Common applications include:
- Industrial automation control cabinets and enclosures
- PLC I/O protection circuits
- Distributed 24 V DC power systems
- Selective circuit protection in machine control systems
- Redundant power supply configurations
Compatibility & Replacements
Compatible With
- Siemens SITOP PSE power supply units (24 V DC output)
- SIMATIC S7-1500, S7-1200, S7-300, S7-400 PLCs
- SIMOTION motion control systems
- 24 V DC industrial automation systems
- DIN rail-mounted industrial control enclosures
- Selectivity modules with single-channel signaling output the status of four channels cyclically by means of a serial code which can be read in by a digital PLC input; function blocks for SIMATIC S7-1500/1200/300/400 and SIMOTION CPUs available free of charge
Replaces / Drop-In Replacement For
- 6EP1961-2BA00 (older selectivity module variant, verify pin configuration before replacement)
- Verify compatibility with your system integrator before ordering any replacement scenarios
Works With
- Siemens SITOP PSE200U power supplies
- SITOP select diagnostics modules (complementary diagnostics)
- 24 V DC control and automation networks
- Industrial relay and contactor circuits
- Digital PLC input modules (via serial signaling or common relay contact)
