SIEMENS 6SL3255-0AA00-4CA1 Drive Accessory

SIEMENS 6SL3255-0AA00-4CA1 SINAMICS G120 Basic Operator Panel (BOP-2)

 

 

The SIEMENS 6SL3255-0AA00-4CA1 is a SINAMICS G120 Basic Operator Panel (BOP-2) used for drive parameter setting and local control of Siemens VFDs.

Product Information

• Brand: Siemens
• Part Number: 6SL3255-0AA00-4CA1
• Series: SINAMICS G120
• Type: Basic Operator Panel (BOP-2)
• Function: Drive keypad for parameterization, monitoring, and local control
• Display: 2-line monochrome LCD
• Control: Start/stop, direction, parameter access
• Compatibility: SINAMICS G120 / G120C / related drives

What it actually is

This is not a controller module and not a drive power part.

It is a human-machine interface keypad for VFDs, meaning:

• Used to configure drive parameters
• Displays fault codes and status
• Allows local operation (run/stop/jog)
• Plugged directly into the SINAMICS drive front port

System Role (Simple)

Operator
→ BOP-2 keypad (this part)
→ SINAMICS G120 drive
→ motor speed control

So it acts like a “control keyboard for the drive”.

Key Features

• 2-line LCD display
• Local parameter editing for SINAMICS drives
• Start/stop and direction control
• Fault diagnosis display
• Plug-and-play connection to G120 series
• Industrial-grade sealed keypad

Typical Applications

• Commissioning of Siemens VFDs
• On-site maintenance and troubleshooting
• Machine setup and testing
• Temporary local operation without PLC
• Drive parameter backup/adjustment

Important Notes

• Not a PLC ❌
• Not a drive power module ❌
• Not a communication module ❌
• It is a drive operator keypad (HMI panel for VFD) ✔
• Drive will still run without it (not required for operation)

Precautions

• Must match compatible SINAMICS firmware series
• Do not force connection (fragile interface pins)
• Not suitable for harsh impact environments
• Parameter changes can affect motor behavior immediately
• Should be handled carefully in maintenance environments