Product Description:

The 3200121002 is a rotary incremental encoder manufactured by Danaher within the Dynapar Encoders series. Mounted on a 3/8-inch shaft, the device converts bidirectional shaft rotation into pulse streams that counters, PLC modules, and servo drives can use for position or speed feedback. In industrial automation, it allows motion controllers to synchronize conveyors, indexers, or motor shafts with precise timing. The fixed 3 ft cable allows power and signal leads to be routed directly to control enclosures without additional connectors.

For electrical interfacing, the encoder draws a maximum supply current of 80 mA, and its open-collector outputs support pull-up connections. The output stage responds to shaft movement at frequencies up to 120 kHz, enabling accurate pulse capture even at the maximum mechanical speed of 6000 rpm. Each revolution is divided into 12 PPR, providing consistent step angles for basic position tracking and speed calculations. A 3/8 in solid shaft couples directly to gearheads or motor extensions while helping keep runout low. This shaft arrangement provides a direct mechanical interface for applications that use rigid or flexible couplings.

The open-collector output can sink up to 40 mA at field voltages no higher than 30 VDC, making the encoder compatible with common 24 V control rails. Startup friction is limited by a maximum starting torque of 2.5 oz-in. The rotor has a moment of inertia of 9.0 × 10⁻⁴ oz-in-s², so it adds little resistance during rapid acceleration or deceleration. A factory-installed 2.2 kΩ pull-up resistor references the single-ended outputs to the supply, eliminating external components in most installations. Bidirectional rotation is detected through quadrature A and B output signals, which provide the phase relationship needed to determine rotational direction. The shaft exits the housing through a sealed bearing, helping protect the internal components while supporting stable rotation during continuous operation.