Posital-Fraba's family of through-hollow incremental encoders are designed to be installed with the machine shaft passing through the sensor. They can be used to monitor rotary motion in a variety of machinery, including servomotors, material handling equipment and printing presses. For motors, they can be installed between the body of the motor and other components mounted on the shaft.
The through hollow encoders are available for shaft diameters ranging from 3/8 inch (9.5 mm) to 1-3/4 inch (44.5 mm). The smaller units (up to 14 mm shaft opening) have an external diameter of 2-1/4 inch (58 mm), while the larger units (5/8 inch to 1-3/4 inch shaft size) have external diameters of 3 or 4 inches (77 or 100 mm). Available resolutions for these devices extend from 360 PPR to 4096 PPR (pulses per revolution).
All through hollow encoders have aluminum housings and environmental protection rated at IP65. All variants are available with a variety of communications interfaces, including RS422 (TTL) 5V or 11-30V and Push-Pull (HTL, 5-30V). Connection options include built-in cables or MIL-type connectors.
