The sink current available from the NEC2505 is between 0 and 2mA. Therefore, the maximum voltage drop across RPx3 is calculated by multiplying the 2mA maximum current times the resistor value of RPx3. For example, if a 10k ohm resistor pack is used for RPx3, then the maximum voltage drop is 20 volts. The digital output will never drop below the voltage at OUTC, however. Therefor a 10k ohm resistor pack will result in a low level voltage of .7 to 1.0 volts at the I/O output for an external supply voltage between 4 and 21 VDC. If a supply voltage greater than 21 VDC is used, a higher value resistor pack will be required.The resistor pack RPx3 is removed to provide open collector outputs. The same calculations for maximum source current and low level voltage applies as in the above circuit. The maximum sink current is determined by the NEC2505, and is approximately 2mA.
High Power Digital Outputs
• Maximum external power supply voltage: 28 VDC
• Minimum external power supply voltage: 4 VDC
• Maximum source current, per output: 500mA
• Maximum sink current: sinking circuit inoperative Standard Digital Outputs
• Maximum external power supply voltage: 28 VDC
• Minimum external power supply voltage: 4 VDC
• Maximum source current: limited by pull up resistor value
• Maximum sink current: 2mA
The vector distance is the integral of Vs
or the total distance traveled along the path. To illustrate this further, suppose that a string was placed along the path in the X-Y plane. The length of that string represents the distance traveled by the vector motion. The vector velocity is specified independently of the path to allow continuous motion. The path is specified as a collection of segments. For the purpose of specifying the path, define a special X-Y coordinate system whose origin is the starting point of the sequence. Each linear segment is specified by the X-Y coordinate of the final point expressed in units of resolution, and each circular arc is defined by the arc radius, the starting angle, and the angular width of the arc. The zero angle corresponds to the positive direction of the X-axis and the CCW direction of rotation is positive. Angles are expressed in degrees, and the resolution is 1/256th of a degree.
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