Anaheim CLCI2000 user manual Encoder Inputs, Outputs

ENCODER INPUTS

A Rotary Encoder is a device that measures rotation of a shaft. The encoder can be mounted on the step motor shaft, or for even greater accuracy, it can be mounted on the shaft of the load. The encoder sends signals in a format called 'quadrature' to the controller which will take this data and use it to verify the motor position. The encoder has four or five wires: Power, Ground, Phase A, Phase B, and a Marker Pulse . The encoder can be used to form a closed loop system which will ensure the motor position. The guaranteed accuracy of the system will then be determined by the resolution of the encoder. Anaheim Automation stocks a 400 line encoder. This will produce 1600 counts per revolution, which results in accuracies of better than 0.225E.

INPUTS

These are general purpose inputs that can be used to integrate sensors, logic, switches, or a number of other things that will be used in coordinating the motion. They may be used to initiate a machine cycle, or allow for operator intervention, for sensing a machine condition such as 'out of material', or to wait for a particular temperature to be reached. These inputs contain 2.5K pullups resistor to +5VDC, and are activated when they reach a TTL/CMOS Low Level, or 0VDC.

OUTPUTS

These are Open-Collector Darlington type outputs. They may be used to operate coolant valves, air cylinders, relays, solenoids, external logic, or, with the right interfacing, any electrically controlled device. The Outputs will go to the 0.7 VDC level, and can sink a total of 500mA. The Maximum Voltage that can be applied to the Outputs is 50 VDC. (See Specification Section on page 3 for more information.)

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