6EP1961-2BA51

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Redundancy modules

SITOP redundancy modules

• High availability of the 24 V DC supply thanks to redundant configuration
• Decoupling of two power supplies of the same type in parallel operation via diodes
• 24 V DC power supply is maintained in the event of a power failure
• Compact redundancy modules for power supply units up to 40 A
• Diagnostic signal via LED and signaling contacts
• Adjustable switching threshold for LED and signaling contacts
• Direct integration in SIMATIC PCSВ 7 via SITOP library

Buffer module

SITOP buffer module

• Buffering the load current during brief power interruptions
• Maintenance-free capacitors with short charging times as energy storage units
• Wiring parallel to the output of the power supply
• Parallel switching of several buffer modules possible
• A supply voltage > 20.5 V is signaled by an LED on the device.
• Buffer time up to: 200В ms at 40В A, 400В ms at 20В A, 800В ms at 10В A, 1.6В s at 5В A load current

Selectivity modules

SITOP selectivity modules

• Distribution of the load current over up to 4В current circuits with individually adjustable maximum current
• Monitoring of individual partial currents
• Reliable tripping regardless of cable lengths and cross-sections
• Selective cutoff of current circuits at overload or short-circuit
• Simple commissioning thanks to manual switch on/off of outputs
• Sequential connection delay of feeders reduces total inrush current
• Sealable transparent cover over adjusters for currents and times protect against maladjustment
• Remote reset possible from a central location
• Signaling via LEDs (channel-by-channel) and remote diagnostics via common signaling contact or single-channel signaling
• Evaluation of the status of 4 current circuits of selectivity modules with single-channel signaling via SIMATIC S7 function blocks.
• Direct integration in SIMATIC PCSВ 7 via SITOP library