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- 6ES5955-7NC11
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PRODUCT DESCRIPTION
6ES5955-7NC11 CC 155H Rack Power Supply
Siemens 6ES5955-7NC11 is the PS 955 power supply described for the SIMATIC S5-155H CC 155H rack. It accepts nominal 24 V DC and supplies the rack backplane with a 5 V-class output rated 14 A and a 24 V output rated 1 A. The supply powers the rack modules and does not provide the separate load voltages required by signal-module field circuits.
The permitted input range is 18 to 33 V DC, with a maximum 7 A input at nominal voltage and rated load. The 5 V output is set to 5.1 V and requires a 200 mA base load. The unit provides monitored output indications and an optional monitored redundant backup-battery arrangement. Although the manual describes galvanic separation, it explicitly states that this is not safe isolation; the incoming 24 V source must meet the required safe-isolation conditions.
The permitted input range is 18 to 33 V DC, with a maximum 7 A input at nominal voltage and rated load. The 5 V output is set to 5.1 V and requires a 200 mA base load. The unit provides monitored output indications and an optional monitored redundant backup-battery arrangement. Although the manual describes galvanic separation, it explicitly states that this is not safe isolation; the incoming 24 V source must meet the required safe-isolation conditions.
BEFORE YOU BUY
Confirm the complete 6ES5955-7NC11 identity
ACTUAL APPLICATIONS
Application fields for 6ES5955-7NC11
These broad application fields reflect the documented function and technical characteristics of 6ES5955-7NC11.
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01 · CHEMICALS
Industrial Chemicals and Chemical Specialties
General industrial chemicals and organic petrochemicalsSpecialty chemicals and conventional inorganic chemical applications -
02 · WATER & WASTEWATER
Municipal Sanitation and Industrial Water
Municipal sanitation and urban wastewater treatmentIndustrial water treatment and broader water reuse -
03 · POWER GENERATION
Thermal Power and Alternative Electricity
Thermal power generation and conventional electricityAlternative electricity generation and hydroelectric power
Technical specifications for 6ES5955-7NC11
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Product Model6ES5955-7NC11
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Product ParametersCC 155H Rack Power Supply
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In stock1 unit
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ManufacturerSiemens
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Nominal input voltage24 V DC
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Permitted input range18 to 33 V DC
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Maximum input current at rated load7 A at nominal voltage
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5 V output setting5.1 V DC
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5 V output current14 A
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5 V required base load200 mA
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24 V output current1 A
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24 V output tolerance+25% / -12.5%
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Input fuse10 A; 25 V; medium time-lag
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Minimum rated-load efficiency70%
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Selectable power-failure hold-upMore than 20 ms or more than 5 ms
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Maximum 5 V ripple1%
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Maximum 5 V settling time5 ms
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Relay-output rating24 V DC; 0.2 A maximum
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Conductor cross-section0.2 to 2.5 mm2
View all additional
Alternative Names
6ES5955-7NC11
SIMATIC S5-155H PS 955
CC 155H Rack Power Supply
SYSTEM & REPLACEMENT CHECK
Information needed before ordering
Three direct checks to secure your system integration and minimize ordering risks.
Information
System integration
Replacement check
Manuals & support
SYSTEM INTEGRATION
Integrate 6ES5955-7NC11 within SIMATIC S5-155H PS 955
Use this PS 955 only in the documented CC 155H arrangement and calculate the backplane loads separately for the 14 A and 1 A outputs. The 5 V output requires a 200 mA base load. Field load power must be provided separately where the signal modules require it.
Provide a safely isolated 24 V source within 18 to 33 V DC and use the documented input protection. The supply itself does not establish safe isolation between incoming and outgoing circuits. Observe the manual grounding arrangement, including the common ground of the two outputs.
Select the documented power-failure hold-up setting and connect monitoring or optional backup hardware only as described for the rack. Verify the 5 V and 24 V indications, output readings and intended fault signals after installation before releasing the rack.
Features:
- Nominal input voltage: 24 V DC
- Permitted input range: 18 to 33 V DC
- SIMATIC S5-155H PS 955
Use 6ES5955-7NC11 only within the documented SIMATIC S5-155H PS 955 arrangement and applicable installation instructions.
INTERCHANGEABILITY
Replace 6ES5955-7NC11 within SIMATIC S5-155H PS 955
Record 6ES5955-7NC11, the CC 155H installation, hold-up selection and any backup-battery arrangement. Other PS 955 power supplies can have different rack or electrical selections and must not be substituted solely on the PS 955 designation.
Isolate the incoming DC supply and follow the rack procedure for battery and monitoring connections. Label conductors and inspect the fuse, terminals and backplane contacts. Verify the safely isolated incoming source before reconnecting the replacement.
Restore power and check both monitored output rails and the approved alarm response. Confirm the 5 V base load and the connected rack demand. If polarity was reversed, follow the manufacturer fuse and inspection instructions rather than simply reapplying power.
Features:
- 6ES5955-7NC11 complete order code
- Conductor cross-section: 0.2 to 2.5 mm2
- Retain the documented SIMATIC S5-155H PS 955 connection arrangement
Use 6ES5955-7NC11 only within the documented SIMATIC S5-155H PS 955 arrangement and applicable installation instructions.
DOCUMENTATION STATUS
Browse the Manuals, Datasheets, Official Documents, Links
Important Notice: The linked files are Amikong-hosted reference documents. Match their product identity and scope to the supplied assembly, and consult the applicable manufacturer instructions before use. Accessories and additional documents are included only when expressly listed in the quotation.Features:
- Exact-model technical data for 6ES5955-7NC11
- Document applicability checked against the complete identity
- Directory links by subcategory and brand
Documentation for 6ES5955-7NC11 must match the installed product identity and supplied configuration.
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Important notice
Manuals, software, firmware, cables, calibration data and accessories are included only when listed in the quotation. AMIKON is an independent supplier and is not affiliated with or authorised by the manufacturer.
This content has been produced using multiple sources. Takes no responsibility for the accuracy of this information. Always consult the original equipment manufacturer for the most up to date instructions and information.
BUYER INFORMATION
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Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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01
Shipping & delivery
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DispatchEligible stock: same / next day
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CarriersDHL, FedEx or UPS
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Ship fromXiamen, China
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Product size4.00 x 25.50 x 20.50 cm
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Net weight1.35 kg
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Payment & customs
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PaymentBank transfer (T/T)
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CurrenciesUSD · EUR · GBP · RMB
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Credit cardsNot accepted
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HS reference8504401990
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OriginGermany
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Warranty & returns
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Warranty12 months from AMIKON
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InspectionLabel, condition and packing checks
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ReturnsPrior RMA authorisation required
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CompatibilityConfirm before order
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OEM warrantyDoes not apply
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Your written quote confirms the product identity, price, availability, lead time, warranty and shipping terms before payment.
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Part checked
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Dedicated account manager · 15+ years
FREQUENTLY ASKED QUESTIONS
Questions buyers ask about 6ES5955-7NC11
Direct answers about identity, compatibility, stock, warranty, payment and shipping.
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Why does the 5 V rail of 6ES5955-7NC11 need a base load?
The PS 955 data for 6ES5955-7NC11 specifies a 200 mA base load on the 5 V rail. Check that condition when evaluating an unloaded or lightly populated rack. -
Which two rack-output ratings belong to 6ES5955-7NC11?
6ES5955-7NC11 provides a 5 V-class rail rated 14 A and a 24 V rail rated 1 A. Review both rail demands in the CC 155H arrangement. -
What incoming DC limits apply to 6ES5955-7NC11?
The permitted input range for 6ES5955-7NC11 is 18 to 33 V DC around a nominal 24 V supply. Its maximum nominal-input current at rated load is 7 A. -
Does 6ES5955-7NC11 provide the separate field-load supply for signal modules?
No. 6ES5955-7NC11 powers the documented backplane arrangement; separate signal-module field load voltages must be supplied as required by the installation. -
What fuse specification should maintenance verify on 6ES5955-7NC11?
The documented input fuse for 6ES5955-7NC11 is 10 A, 25 V, medium time-lag. Follow the manufacturer replacement procedure and retain the specified characteristics. -
Which hold-up setting must be recorded before a 6ES5955-7NC11 exchange?
6ES5955-7NC11 has selectable power-failure hold-up exceeding 20 ms or exceeding 5 ms. Record the installed selection before removing the supply. -
What distinguishes an order for 6ES5955-7NC11 from a generic S5 power supply?
Identify the CC 155H PS 955 application, 24 V input and complete 6ES5955-7NC11 code. An unspecified S5 supply may have a different rack or electrical arrangement. -
What backup and monitoring equipment should a 6ES5955-7NC11 quotation list separately?
For 6ES5955-7NC11, separately identify any requested backup battery, relay wiring or associated hardware. State the actual supplied scope rather than assuming those items accompany the supply.
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