EN11-VSB1AQ15 is a rotary encoder from the EN11 Series featuring side adjustment with a plain bushing and integrated push-on switch. This incremental encoder operates with 2-bit gray code output and supports 15 pulses per revolution with 20 detents, providing precise rotational position feedback. The encoder delivers a maximum closed circuit resistance of 3 Ohms, operates at up to 100 RPM, and features a switch contact rating of 10 mA at 5 Vdc with 100 milliohms contact resistance. With a rotational torque of 2.5 oz-in maximum and switch operating force of 550 gf, this encoder is designed for reliable operation in control panels and instrumentation applications requiring continuous rotational feedback with detent positioning.