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Kollmorgen S406BA-CA

Model Code: S406BA-CA

Product Overview:
The S406BA-CA is a single-turn absolute encoder from Kollmorgen’s S400 product family. The S400 series is an economy-grade absolute encoder line offering reliable position feedback at a lower cost point.

Detailed content

Technical Specifications:

Parameter Value
Type Single-turn absolute encoder
Resolution 12 bits (4096 counts/rev)
Interface SSI (Synchronous Serial Interface)
Supply Voltage 5 VDC ± 10%
Output Protocol SSI (binary code)
Clock Frequency Up to 1 MHz
Update Rate 400 μs
Operating Temperature -10°C to +70°C
Protection Rating IP54
Shaft Type Solid shaft, 6 mm diameter
Max Speed 5000 RPM
Weight ~75 g
Connector M12 8-pin
Housing Material Zinc die-cast with plastic end cap
Housing Diameter 40 mm
Housing Length 52 mm

Functional Features:

  • 12-bit SSI output — 4096 positions per revolution
  • Binary code output — simple position readout
  • Compact 40 mm housing — fits in tight spaces
  • Low cost — economy-grade absolute feedback
  • M12 connector — industrial standard, easy replacement

Structural Characteristics:

  • Ø40 mm compact cylindrical housing
  • Zinc die-cast body with plastic end cap
  • M12 8-pin connector (IP54 rated)
  • Solid 6 mm shaft with set screw

Working Principle:
An LED reads a glass code disk with 12-bit binary track patterns. A photodetector array converts the pattern to digital data. The SSI protocol clocks out 12 bits of position data plus a zero bit on each clock cycle. The drive latches the data on the clock falling edge.

Key Advantages:

  • Low cost absolute feedback — eliminates homing routines
  • 40 mm form factor — smallest in Kollmorgen absolute encoder range
  • M12 connector — widely available, easy field replacement
  • SSI simplicity — no addressing, no configuration needed

Applicable Industries:

  • Conveyor position tracking
  • Valve actuators
  • Gate and barrier positioning
  • Agricultural equipment
  • Simple automation axes

Installation Requirements:

  • SSI clock ≤ 1 MHz
  • Use shielded cable for clock and data lines
  • M12 connector — ensure proper mating torque

Usage Precautions:

  • Do not exceed 5000 RPM
  • Operating temperature limited to +70°C (lower than S700 series)
  • Keep code disk area clean
  • IP54 rating — do not submerge in liquid

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