How to Select an Interface Relay for PLC Outputs
A step-by-step guide to matching PLC output type, coil voltage and current, contact rating, and socket style when selecting an interface relay.
- Part number
- 6GK7277-1AA10-0AA0
- Model no
- CSM 1277
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SIMATIC S7-1200Siemens 6GK7277-1AA10-0AA0 CSM 1277 4-Port Compact Switch Module for SIMATIC S7-1200
CSM 1277 unmanaged 4-port switch module for SIMATIC S7-1200, 10/100 Mbit/s RJ45, 24V DC, IP20.
Description
About the CSM 1277
About the CSM 1277
The Siemens 6GK7277-1AA10-0AA0 Compact Switch Module CSM 1277 is an unmanaged 4-port Industrial Ethernet switch (10/100 Mbit/s RJ45) that connects a SIMATIC S7-1200 CPU and up to 3 further nodes without a separate switch enclosure. It runs from an external 24 V DC supply, mounts in the S7-1200 device footprint, and is rated IP20 for 0 to 60 °C operation.
Certifications & Standards
- CE
- UKCA
- cULus
- RCM
- ATEX
- UKEX
- IECEx
- CCC
- FM registration
- RoHS
Selection Notes
The 4-port unmanaged design and S7-1200 form factor make this module a fit inside a single S7-1200 station that needs up to 3 additional Ethernet drops (HMI, PC, or a further CPU) without a rack-mounted switch. PRP operation support lets it participate in a parallel-redundant network where the application requires it. Where more than 4 ports or managed diagnostics (VLAN, port mirroring, SNMP) are needed, a SCALANCE X-series managed switch is the better fit instead of this compact unmanaged module.
Applications
Adding local Ethernet ports to a SIMATIC S7-1200 station — connecting an HMI, engineering PC, or a neighboring CPU — without a separate switch enclosure, in cabinets rated 0 to 60 °C.
Specification
Full specification
Product type designation 2
| product brand name | SCALANCE |
|---|---|
| product type designation | CSM 1277 |
Transfer rate 1
| transfer rate | 10, 100 Mbit/s |
|---|
Interfaces / for communication / integrated 2
| number of electrical connections: for network components or terminal equipment | 4 |
|---|---|
| number of 100 Mbit/s SC ports: for multimode | 0 |
Show all 84 specifications ↓ Show less ↑79 more values in Identification, Interfaces / other, Supply voltage, current consumption, power loss, Ambient conditions, Design, dimensions and weights, Product functions / management, configuration, engineering, Product functions / redundancy, Standards, specifications, approvals, Standards, specifications, approvals / hazardous environments, Standards, specifications, approvals / other, Standards, specifications, approvals / marine classification, Standards, specifications, approvals / Environmental Product Declaration, Product functions / general, Approvals / Certificates, China RoHS Manufacturer Declara- China RoHS tion, Logistics.
Identification 10
| Part number | 6GK7277-1AA10-0AA0 |
|---|---|
| Type designation | CSM 1277 |
| Brand | Siemens |
| Condition | New, factory sealed |
| Source | Siemens and its authorised distributors |
| Warranty | Manufacturer warranty |
| Lifecycle status | Phase-out announced by the manufacturer |
| EAN | 4019169854399 |
| ETIM class | EC000734 |
| eCl@ss | 19170130 |
Interfaces / other 2
| number of electrical connections: for power supply | 1 |
|---|---|
| type of electrical connection: for power supply | 3-pole terminal block |
Supply voltage, current consumption, power loss 8
| type of voltage / 1 / of the supply voltage | DC |
|---|---|
| supply voltage / 1 / rated value | 24 V |
| power loss [W] / 1 / rated value | 1.6 W |
| supply voltage / 1 / voltage range | 19.2 ... 28.8 |
| consumed current / 1 / maximum | 0.07 A |
| type of electrical connection / 1 / for power supply | 3-pole terminal block |
| product component / 1 / fusing at power supply input | Yes |
| fuse protection type / 1 / at input for supply voltage | 0,5 A / 60 V |
Ambient conditions 5
| ambient temperature: during operation | 0 ... 60 °C |
|---|---|
| ambient temperature: during storage | -40 ... +70 °C |
| ambient temperature: during transport | -40 ... +70 °C |
| relative humidity: at 25 °C / without condensation / during operation / maximum | 95 % |
| protection class IP | IP20 |
Design, dimensions and weights 8
| design | SIMATIC S7-1200 device design |
|---|---|
| width | 45 mm |
| height | 100 mm |
| depth | 75 mm |
| fastening method: 35 mm DIN-rail mounting | Yes |
| fastening method: wall mounting | Yes |
| fastening method: S7-300 rail mounting | No |
| fastening method: S7-1500 rail mounting | No |
Product functions / management, configuration, engineering 2
| product function: multiport mirroring | No |
|---|---|
| product function: switch-managed | No |
Product functions / redundancy 2
| product function: Parallel Redundancy Protocol (PRP)/operation in the PRP-network | Yes |
|---|---|
| product function: Parallel Redundancy Protocol (PRP)/Redundant Network Access (RNA) | No |
Standards, specifications, approvals 8
| certificate of suitability: CE marking | Yes |
|---|---|
| certificate of suitability: UKCA marking | Yes |
| certificate of suitability: cULus approval | Yes |
| certificate of suitability: KC approval | No |
| certificate of suitability: Regulatory Compliance Mark (RCM) | Yes |
| standard: for EMC interference emission | EN 61000-6-4 (Class A) |
| standard: for immunity to EMC | EN 61000-6-2 |
| standard: for safety / from CSA and UL | UL 508, CSA C22.2 No. 142 |
Standards, specifications, approvals / hazardous environments 5
| certificate of suitability: ATEX | Yes |
|---|---|
| certificate of suitability: UKEX | Yes |
| certificate of suitability: IECEx | Yes |
| certificate of suitability: CCC / for hazardous zone according to GB standard | Yes |
| certificate of suitability: FM registration | Yes |
Standards, specifications, approvals / other 1
| certificate of suitability: RoHS conformity | Yes |
|---|
Standards, specifications, approvals / marine classification 10
| certificate of suitability / shipbuilding approval / note | Certifications marked 'No' are currently under renewal. |
|---|---|
| Marine classification association: American Bureau of Shipping Europe Ltd. (ABS) | No |
| Marine classification association: French marine classification society (BV) | No |
| Marine classification association: Chinese Classification Society (CCS) | No |
| Marine classification association: Det Norske Veritas (DNV) | No |
| Marine classification association: Korean Register of Shipping (KRS) | No |
| Marine classification association: Lloyds Register of Shipping (LRS) | No |
| Marine classification association: Nippon Kaiji Kyokai (NK) | No |
| Marine classification association: Polski Rejestr Statkow (PRS) | No |
| Marine classification association: Royal Institution of Naval Architects (RINA) | Yes |
Standards, specifications, approvals / Environmental Product Declaration 5
| Environmental Product Declaration | Yes |
|---|---|
| global warming potential [CO2 eq]: total | 65.14 kg |
| global warming potential [CO2 eq]: during manufacturing | 7.42 kg |
| global warming potential [CO2 eq]: during operation | 57.58 kg |
| global warming potential [CO2 eq]: after end of life | 0.14 kg |
Product functions / general 3
| MTBF | 273 a |
|---|---|
| warranty period | 5 a |
| product function / is supported / identification link | Yes; acc. to IEC 61406-1:2022 |
Approvals / Certificates 2
| Environmental Product Declaration: global warming potential [CO2 eq] / during manufacturing | 7.42 kg |
|---|---|
| Environment General Product Approval | Declaration of Con- formity |
China RoHS Manufacturer Declara- China RoHS tion 1
| General Product Approval EMV For use in hazardous locations | FM |
|---|
Logistics 7
| Net weight | 0.225 kg |
|---|---|
| Package dimensions | 210 × 25 × 290 mm |
| Country of origin | DE |
| Shipping weight | 0.725 kg |
| Ships from | Türkiye |
| Dispatch | 11 Nov |
| Stock | Low stock |
Source: manufacturer data · Last verified: 01 Nov 2026
Documents
Documents for 6GK7277-1AA10-0AA0
No documents are on file for this part yet.
Ask us for the datasheet
Certifications
Certifications and standards
- CE marking
- UKCA marking
- cULus approval
- Regulatory Compliance Mark (RCM)
- ATEX
- UKEX
- IECEx
- CCC / for hazardous zone according to GB standard
- FM registration
- RoHS conformity
Quick answers
Questions about the CSM 1277
What is the rated current of CSM 1277?
The rated current of CSM 1277 is 0.07 A.
What is the HS code of CSM 1277 for customs?
The tariff (HS) code on file for CSM 1277 is 85176200.
What is the EAN of CSM 1277?
The EAN (GTIN) of CSM 1277 is 4019169854399.
Where does CSM 1277 ship from, and how fast?
CSM 1277 ships from Türkiye. Shipping calculated at checkout · import duties and taxes paid on arrival. Stock items are dispatched within 1–2 business days.
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Reviews
Customer reviews
Series
Siemens SIMATIC S7-1200
- Brand
- Siemens
- Series
- SIMATIC S7-1200
