Baumer GM401

The Baumer GM401 is an absolute encoder that uses an optical readout method. It is designed for accurate measurement of angular positions and rotations. This encoder has a synchronous flange and can be electronically adjusted to set the zero point.

Engineered for versatility, it operates within a supply voltage range of 10…30 VDC or 5 VDC ±10%. With reverse polarity protection and a range of output options, the GM401 is built for both resilience and precision.

Datasheet:

• Supply voltage: 10…30 VDC or 5 VDC ±10%
• Reverse polarity protection: Yes (10…30 VDC) / No (5 VDC)
• No load consumption: ≤50 mA (24 VDC), ≤80 mA (5 VDC)
• Initialization time: 20ms after power on
• Interface: SSI
• Incremental output: A 90° B (optional)
• Function: Multi-turn
• Steps per revolution: ≤16384 / 14 bits
• Number of revolutions: ≤65536 / 16 bits
• Absolute accuracy: ±0.025°
• Code sequence: CW/CCW coded by connection
• Inputs: SSI clock, control signals UP/DOWN inv. and zero
• Output cascades: SSI data: Linedriver RS422, push-pull diagnostic outputs
• Incremental output: 512, 1024, 2048 pulses + inversion
• Immunity to interference: EN 61000-6-2
• Radiated interference: EN 61000-6-4
• Diagnostic function: Self-diagnosis
• Approval: UL approval / E63076
• Protection EN 60529: IP 54 (without shaft seal), IP 65 (with shaft seal)
• Rotation speed: ≤10000 rpm (mechanical), ≤6000 rpm (electric)
• Initial acceleration: ≤1000 U/s²
• Starting torque: ≤0.015 Nm (+25 °C, IP 54), ≤0.03 Nm (+25 °C, IP 65)
• Moment of inertia of the rotor: 20 gsm²
• Permissible load on the shaft: ≤20 N axial, ≤40 N radial
• Material: Body: aluminum, flange: aluminum
• Operating temperature: -25…+85 °C, -40…+85 °C (optional)
• Relative humidity: 95% non-condensing
• Resistance: EN 60068-2-6 Vibration ±0.75 mm – 10-58 Hz, 10 g – 58-2000 Hz, EN 60068-2-27 Impact 200 g, 6 ms
• Weight: approximately 400 g
• Connection: M23 connector, 12-pin, M12 connector, 8-pin, cable 1 m