The Siemens 6GK7277-1AA10-0AA0 is a SCALANCE CSM 1277 Compact Switch Module designed specifically for the SIMATIC S7-1200 controller platform. It is an unmanaged 4-port Industrial Ethernet switch that multiplies the single Ethernet interface of an S7-1200 CPU, enabling simultaneous connection of up to three additional Ethernet devices such as operator panels (HMI), programming devices (PG), or other controllers.
Item No :
6GK7277-1AA10-0AA0Order(MOQ) :
1Payment :
EXWProduct Origin :
GermanyShipping Port :
Wuhan, Hubei, ChinaLead Time :
3-5 daysWeight :
0.225kgOverview
6GK7277-1AA10-0AA0 SIMATIC PLC Module
New in stock
Origin from Germany
Payment Method: TT.Western Union
Shipping Method: DHL\UPS\Fedex\EMS\Others
More Brands
| Part Number | Description | Key Difference |
|---|---|---|
| 6GK7277-1AA10-0AA0 | CSM 1277, 4-port unmanaged switch (this item) | Standard model for S7-1200 |
| 6AG1277-1AA10-4AA0 | SIPLUS NET CSM 1277 | Conformal-coated variant for extreme environments |
| 6GK5005-0BA00-1AB2 | SCALANCE X005 | Standalone unmanaged switch (not S7-1200 form factor) |
| 6GK5204-2BB10-2AA3 | SCALANCE X204-2 | Managed switch with fiber ports |
| 6ES7972-0BA60-0XA0 | PROFIBUS FastConnect connector | For PROFIBUS networks (not Ethernet) |
1 × Siemens 6GK7277-1AA10-0AA0 SCALANCE CSM 1277 Compact Switch Module
1 × Electronic Equipment Manual on CD-ROM
Note: S7-1200 CPU, HMI panels, Ethernet cables, and DIN rail are sold separately.
In Stock – Ready to ship immediately
Genuine Siemens Product – Factory original SCALANCE module
Warranty Included – Purchase with confidence
Technical Support – S7-1200 network configuration assistance available
Q1: What is the Siemens 6GK7277-1AA10-0AA0?
It is a SCALANCE CSM 1277 Compact Switch Module—a 4-port unmanaged Industrial Ethernet switch designed for the SIMATIC S7-1200. It expands the S7-1200’s single Ethernet port to connect up to three additional devices .
Q2: Is this a managed or unmanaged switch?
It is an unmanaged switch. No configuration, IP address assignment, or management software is required. It operates as a plug-and-play device .
Q3: How many additional devices can I connect?
The CSM 1277 has 4 RJ45 ports total. One port connects to the S7-1200 CPU, leaving 3 ports available for additional devices such as HMIs, programming laptops, or other controllers .
Q4: Does this switch require an external power supply?
Yes. The CSM 1277 requires a 24 V DC external power supply connected via a 3-pole terminal block. It does not draw power from the S7-1200 backplane .
Q5: What is the operating temperature range?
The operating range is 0 to +60 °C. Storage and transport range is -40 to +70 °C .
Q6: What are the dimensions and weight?
Dimensions are 45 mm (W) × 100 mm (H) × 75 mm (D). Net weight is 0.15 kg .
Q7: Does this switch support auto-crossover?
Yes. The integrated auto-crossover (Auto-MDI/X) function allows the use of standard uncrossed RJ45 cables for all connections .
Q8: Is this switch suitable for hazardous areas?
Yes. The CSM 1277 carries ATEX, UKEX, IECEx, CCC (Ex zone), and FM approvals for use in hazardous locations (Class I, Division 2 / Zone 2) .
Q9: Does the CSM 1277 support PRP (Parallel Redundancy Protocol)?
Yes. According to the Siemens data sheet, the CSM 1277 supports operation in PRP networks .
Q10: What is the country of origin?
Germany .
Q11: What should I verify before ordering?
Always verify the exact part number (6GK7277-1AA10-0AA0), confirm that you need an unmanaged switch (no VLAN or management features), ensure your application does not require fiber optic ports (this model is copper RJ45 only), and check whether the ATEX/IECEx approvals are required for your installation environment.
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