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The Siemens 6ES7133-6CV15-1AM0 is a 15 mm BaseUnit cover accessory for the SIMATIC ET 200SP distributed I/O system. Its official product type designation is BU Cover. The product is supplied as a package of five covers and is intended for protecting unused BaseUnit positions.
Within an ET 200SP installation, BaseUnits provide the mechanical mounting and electrical connection interfaces for I/O modules. When a BaseUnit position remains unused, its exposed connection interfaces can become vulnerable to dust and other environmental contamination. The 6ES7133-6CV15-1AM0 covers the empty position and helps protect the open plug contacts.
The cover is particularly relevant in control cabinets where the ET 200SP station contains unused positions or where the system layout requires additional clearance between installed equipment. It can also be used in specified motor starter installations as a dummy module to improve electromagnetic interference immunity.
The 15 mm version is intended for compatible BaseUnits of type A0 or A1. It is a passive mechanical accessory and does not contain electronic components, perform signal processing, or participate in PLC communication.
For maintenance and system expansion, the cover helps keep unused BaseUnit interfaces protected until the corresponding position is required for a future installation.
| Parameter | Specification |
|---|---|
| Manufacturer | Siemens |
| Model | 6ES7133-6CV15-1AM0 |
| Product Series | SIMATIC ET 200SP |
| Product Type | BU Cover |
| Official Product Designation | SIMATIC ET 200SP, 5 BU Covers, 15 mm |
| Accessory Type | BaseUnit Cover |
| Package Quantity | 5 Pieces |
| Cover Width | 15 mm |
| Compatible BaseUnit Types | A0 / A1 |
| Primary Function | Protection of Empty BaseUnit Positions |
| Application | ET 200SP Distributed I/O System |
| Mounting System | SIMATIC ET 200SP |
| Operating Temperature (Horizontal Installation) | -40 to +60°C |
| Operating Temperature (Vertical Installation) | -40 to +50°C |
| Maximum Installation Altitude | 5,000 m |
| Dimensions | 15 × 73 × 35.3 mm |
| Weight | 0.047 kg |
The Siemens 6ES7133-6CV15-1AM0 works through a simple mechanical protection arrangement rather than an electronic operating process.
When an ET 200SP BaseUnit is installed without an I/O module, its connection interfaces may remain exposed. These include the power connector, power bus connector, and backplane bus connector.
The BU cover is fitted over the corresponding unused position to protect these exposed interfaces from dirt and contamination.
Its operation can be summarized as:
Unused ET 200SP BaseUnit → 6ES7133-6CV15-1AM0 Installation → Covered Connection Interfaces → Reduced Exposure to Contamination
In specified motor starter installations, the cover can also serve as a dummy module positioned between preceding equipment and the first motor starter. This arrangement helps maintain the required installation conditions for electromagnetic compatibility.
The cover does not carry electrical signals, switch circuits, or communicate with the PLC. Its function is entirely mechanical and protective.
Within the SIMATIC ET 200SP architecture, the 6ES7133-6CV15-1AM0 is an installation accessory rather than an active automation component.
ET 200SP stations consist of interface modules, BaseUnits, digital and analog I/O modules, and other compatible equipment. Not every BaseUnit position necessarily requires an active I/O module.
When a BaseUnit remains unused, the BU cover provides protection for the exposed connection interfaces.
A typical installation arrangement is:
SIMATIC PLC → ET 200SP Interface Module → BaseUnits → Digital / Analog I/O Modules → Field Devices
At an unused position:
ET 200SP BaseUnit → 6ES7133-6CV15-1AM0 BU Cover
The cover is also relevant when configuring certain ET 200SP motor starter installations. For specified interference-free arrangements, Siemens identifies this 15 mm cover together with BaseUnit 6ES7193-6BP00-0BA0 as the dummy module arrangement before the first motor starter.
This makes the accessory useful for both protecting unused electrical interfaces and maintaining specified mechanical installation arrangements.
The 6ES7133-6CV15-1AM0 is used in ET 200SP installations where unused BaseUnit positions need mechanical protection.
| Industrial Application | Typical Use |
|---|---|
| Manufacturing Automation | Covering unused BaseUnit positions in PLC control cabinets |
| Automotive Production | Protecting unused ET 200SP station connections |
| Packaging Machinery | Maintaining covered positions in distributed I/O stations |
| Conveyor Systems | Protecting unused connection interfaces in control cabinets |
| Water Treatment | Covering spare I/O positions in distributed control panels |
| Chemical Processing | Protecting unused BaseUnit contacts in automation installations |
| Motor Starter Installations | Providing a specified dummy module arrangement |
| Power Distribution | Covering unused distributed I/O connection positions |
| Industrial Assembly Lines | Maintaining protected spare positions for system expansion |
| Process Automation | Protecting unused ET 200SP BaseUnit interfaces |
| Component | Function |
|---|---|
| Siemens 6ES7133-6CV15-1AM0 | 15 mm ET 200SP BU Cover |
| Siemens 6ES7193-6BP00-0BA0 | BU Type A0 BaseUnit |
| Siemens 6ES7193-6BP00-0BA1 | BU Type A1 BaseUnit |
| Siemens 6ES7193-6BP00-0DA0 | BU Type A0 BaseUnit |
| Siemens 6ES7193-6BP00-0DA1 | BU Type A1 BaseUnit |
| Siemens 6ES7133-6CV20-1AM0 | 20 mm ET 200SP BU Cover |
| Model / Product | Product Type | Typical Application |
|---|---|---|
| Siemens 6ES7133-6CV20-1AM0 | 20 mm BU Cover | Protection of unused ET 200SP positions |
| Siemens 6ES7193-6BP00-0BA0 | BU Type A0 BaseUnit | ET 200SP module mounting |
| Siemens 6ES7193-6BP00-0BA1 | BU Type A1 BaseUnit | ET 200SP module mounting |
| Siemens 6ES7193-6BP00-0DA0 | BU Type A0 BaseUnit | ET 200SP electrical connections |
| Siemens 6ES7193-6BP00-0DA1 | BU Type A1 BaseUnit | ET 200SP electrical connections |
| Siemens 3RK1908-1DA00-2BP0 | Infeed Bus Cover | Protection of ET 200SP infeed bus connections |
Its main purpose is to cover unused 15 mm ET 200SP BaseUnit positions. It protects exposed plug contacts, including power and backplane bus connections, against dust and contamination.
The 15 mm cover is intended for compatible BaseUnits of type A0 or A1. The BaseUnit arrangement should be checked before installation.
Yes. Siemens specifies this cover as part of a dummy-module arrangement before the first ET 200SP motor starter in certain installations requiring improved electromagnetic interference immunity. The specified arrangement uses BaseUnit 6ES7193-6BP00-0BA0.
No. It is a passive mechanical accessory. It does not require a power connection, signal wiring, PLC addressing, or software configuration.