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6ES5955-3NC42 Siemens
Original price
$2,699.89
-
Original price
$9,138.00
Original price
$2,699.89
$2,699.89
-
$9,138.00
Current price
$2,699.89
Trusted By
Product Details
Specifications provided for reference. Verify critical details against official manufacturer documentation before installation.
Product Overview
The 6ES5955-3NC42 is a SIMATIC S5 series power supply unit designed primarily for central controller modules (e.g. S5-135U/155U) in Siemens programmable controller systems. It delivers backup and main supply support within legacy S5 installations. In a control system, it supplies I/O and logic power and provides battery backup, fan monitoring, and diagnostic signalling. Typical uses include machine control panels, process system retrofits, and replacement modules in existing S5 automation lines. 6ES5955-3NC42.
Best Suited For
- SIMATIC S5-135U or S5-155U central controllers
- Replacement of failed power supply modules in legacy S5 systems
- Panels requiring uninterrupted I/O power during battery backup or fan fault
- Environments under maintenance support for discontinued S5 automation
Main output voltage
DC 24 V / 2.8 A
Backup battery type
Lithium thionyl chloride 5 Ah; NiCd 1.2 Ah
Approx. weight
5.8 kg
Built-in signalling relays
Fan, battery, fault alarms
Product status
Discontinued
Technical Specifications
I/O & Electrical
Main output
DC 24 V / 2.8 A
Fan, battery, fault relay outputs
max 250 V / 3 A (relay contacts)
Communication & Power
Enable input (EN)
control input for power supply
Voltage monitor (UH)
supply for EN input monitoring
Physical & Environmental
Backup battery - lithium
5 Ah, 3.6 V, service life approx. 10 years
Backup battery - NiCd
1.2 Ah, 3.6 V, service life 6 years @ 40 °C, with deep-discharge protection
Fans service life
approx. 50 000 h @ 40 °C
Noise emission
≈ 58 dBA
Weight
approx. 5.8 kg
