3201201012 Danaher
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The Danaher 3201201012 is an incremental encoder from the Dynapar Encoders series and is bidirectional. It supports a maximum shaft speed of 6,000 RPM with a shaft diameter of 3/8 inch and features a quadrature output format (AB). This encoder has a resolution of 120 PPR and an open collector output type with a maximum output voltage of 30 VDC.
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Product Description:
The 3201201012 encoder is an incremental feedback device manufactured by Danaher as part of the Dynapar Encoders series. Designed for industrial automation, it converts rotary motion into timed electrical pulses so that drive controllers can measure velocity and direction in real time. The unit offers bidirectional operation through quadrature channels, allowing PLCs to detect forward and reverse movement without additional sensors. By mounting on a machine shaft, it delivers digital position information that supports closed-loop speed regulation, indexing, and count-based material-handling tasks.
With a resolution of 120 PPR, the encoder produces 120 pulses during each full revolution, allowing drives to interpret movement in three-degree increments. Its signal integrity is maintained with a minimum frequency response of 120 kHz, so high-speed counters can track rapid motion without missing edges. The quadrature AB pattern is delivered through an open-collector output stage that tolerates field voltages up to 30 VDC and sinks up to 40 mA per channel. External pull-up resistors are required because the output stage does not have an internal pull-up resistor. A maximum mechanical input speed of 6,000 RPM allows the device to couple to fast spindles without overspeeding the sensing disk. The incremental architecture supplies both direction and relative position information for motion monitoring.
Rotor inertia is 9.0 × 10⁻⁴ oz-in-s², helping reduce acceleration error when the shaft changes speed. A 3/8-inch single-ended shaft provides direct coupling to common motor outputs, and keyless clamps or set screws can secure the hub without adapters. Starting friction is limited to 2.5 oz-in, so light-duty servos can overcome static drag during startup. The encoder has a mass below 14 oz, easing installation on small motor backs and reducing cantilever loads on bearings. Its compact mass also limits the additional mechanical load placed on the mounting structure during rapid acceleration and deceleration. The shaft arrangement supports straightforward alignment with compatible couplings while preserving stable pulse generation during rotation.
