Product Introduction
When overcurrent faults jeopardize uptime in 24V DC control systems, the Siemens 6EP1961-2BA11 SITOP PSE200U selectivity module delivers precise, channelized protection. This 4-channel module accepts 24V DC input up to 12A and provides four individually adjustable outputs (0.5–3A each). Its integrated common signaling contact and three-color LEDs per channel enable immediate fault identification, reducing troubleshooting time. Part of the SITOP series, the 6EP1961-2BA11 ensures selective disconnection of loaded circuits, critical in distributed automation architectures.
Technical Specifications Breakdown
The Siemens 6EP1961-2BA11 operates from a 22–30V DC input with a rated input current of 12A. Key output parameters include:
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Adjustable output current: 0.5 to 3A per channel, set via potentiometer
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Efficiency: 97% typical
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Power loss: 9 W typical at rated output
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Switch-off characteristics: Excess current (1.0–1.5× set) switches off after ~5 s; current limitation (1.5× set) after ~100 ms; immediate switch-off in <0.5 ms if input voltage drops below 20V.
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Residual current at switch-off: 1 mA typical
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Response delay: Maximum 5 s
These parameters enable the module to protect sensitive downstream equipment while maintaining upstream power continuity.
Industry Applications
The Siemens 6EP1961-2BA11 is ideal for machine tools, conveyor systems, and process control panels where selective branch protection is required. For instance, in a CNC machining center, each axis drive can be independently monitored and isolated without shutting down the entire control cabinet. This failure mode analysis approach prevents cascading faults and reduces downtime.
Installation & Setup Guidance
Mount the Siemens 6EP1961-2BA11 on a standard DIN rail (EN 60715 35x7.5/15). Input wiring uses two screw terminals (0.5–16 mm²) for +24V and two (0.5–4 mm²) for 0V. Each output uses a single screw terminal (0.5–4 mm²). A DIP switch configures the startup delay: 25 ms, 100 ms, or load-optimized sequential connection. Use the potentiometer on each channel to set the trip threshold between 0.5 and 3 A. Ensure natural convection with 50 mm clearance above and below.
Selection Guide & Purchasing Advice
Before purchasing the Siemens 6EP1961-2BA11, verify your incoming supply voltage range (22–30V DC) and total load current (max 12A input, 3A per output). For high-reliability applications, consider the remote reset function via a non-isolated 24V input. Order the optional device identification label (3RT2900-1SB20) for clear panel marking. PLC Source PRO (ubest101) stocks these modules with fast shipping and technical support.