The model HS25 is an industrial strength incremental hollow shaft encoder in a 2.5" housing that mounts directly on an existing shaft. An anti-rotation pin or tether allows the encoder to float on the shaft without rotating. The HS25 generates up to 3 square wave outputs and can be configured as a single (A), quadrature (AB) or quadrature with index (ABZ) device. Dual (AB) and triple (ABC) independent CPR outputs are also available.
Single output models can include the Anti-Jitter feature designed for conveyor and web systems requiring continuous and accurate measurement of the web’s movement even if the system must be stopped and restarted without reset. When the web stops, and if there is sufficient vibration or back-and-forth movement, then the encoder output could oscillate, appearing as if the web were actually moving. Anti-jitter eliminates this condition by significantly increasing the pulse hysteresis.
Counts per Revolution: 1 to 1200 (specify when ordering)
Operating Temperature: 0° to 70° C
Output Circuit: (specify when ordering)
Push/Pull (combined sourcing/sinking)
Current sinking NPN transistsor with built in pull-up resistor
NPN open collector (Vcc=30 vdc max)
Current sourcing PNP transistor
Output Current: 50ma max source/sink
Output Waveshape: Square wave outputs A and B are 50/50 duty cycle nominal. Output Z (index output) is approximately the width of one cycle on outputs A or B. A leads B by 90° for clockwise rotation when viewed from shaft collar end.
Pulse symmetry: 180°±30%
Pulse interval jitter: 30% max
Quadrature: 90°±30% max
Phase jitter: 30% max
Anti-jitter option: (single output models only) Increases the pulse hysteresis to ½ of a pulse width, eliminating the effects of mechanical vibration and the possible diether that restults in false output pulses.
Direction Output option: (single output models) Indicates direction of rotation: "high" for clockwise rotation; "low" for counter clockwise. Initially "low" when powered on.
Accessories See our website or contact us for more information about Cables, Flexible Mounting Brackets, and the Anti-Rotation Pin
Slide the HS25 onto the shaft and tighten set screws. Be sure to maintain clearance around the entire encoder body.
Use the anti-rotation screw, flexible mounting bracket, or other means to prevent the encoder from rotating.
Attach the cable leads to the control device (e.g. PLC) ensuring that the power supply meets specifications.
Attach the cable to the encoder.
Shaft Stub Information
Here is a listing of the suggested Shaft Stubs . For more information, please click on the part number.