EPOT VOLTAGE-TO-QUADRATURE OR VOLTAGE-TO-STEP/DIRECTION CONVERTER

Analog Input Slew Rate:

Output Settling Time in Response to a Full Scale Analog Input Step Transition:

Notes:
(1) The step input was slew rate limited to a 73 V/sec rise time
(2) The step input was slew rate limited to a 200 V/sec rise time

Note: After changing the DIP switch settings, the EPOT must be power cycled to ensure that the device configuration is updated.

DIP switch 1:

Selects the maximum analog input voltage. This voltage must match the output voltage used on connector J1.

↑ Up (1) position for +3.6V max. analog input
↓ Down (0) position for +5V max. analog input.

DIP switch 2:

Selects either velocity output mode or position output mode.

↑ Up (1) position for velocity output mode.
↓ Down (0) position for position output mode.

DIP switch 3:

Selects either quadrature output mode or step/direction mode.

↑ Up (1) position for step/direction output mode.
↓ Down (0) position for quadrature output mode.

DIP switches 4, 5 and 6:

Select the output frequency (for velocity output mode) or position range (for position output mode) as shown in the tables below.

DIP switches 7 and 8:

Selects the size of the dead band. The dead band is a selectable zero velocity output range. With human interface applications utilizing potentiometers or joysticks, it is difficult to return to a very precise zero velocity output location. A wider dead band makes it much easier to return a potentiometer or joystick to a zero-velocity point. This adjusts the width of the zero velocity dead band in the center of a potentiometer or joystick.

DIP switch 9:

Selects the encoder output direction. Moving this switch to the opposite state will change the direction output of the encoder signals.

   ↑ Up (1) position for normal direction on A and B.
   ↓ Down (0) position for reverse direction on A and B.

DIP switch 10:

Selects between a standard potentiometer and joystick style potentiometer. The typical total rotation seen by a potentiometer-based joystick is about 50 degrees. This switch adds a gain of 5 to enable the limited travel of a joystick potentiometer to produce a full-scale output from the EPOT. If a standard potentiometer is used with the EPOT, the gain should be disabled. If the gain is not disabled, the EPOT will reach a maximum value over about a 50-degree rotation of a standard potentiometer.

    ↑ Up (1) position to increase input gain by a factor of 5.
    ↓ Down (0) position to disable the gain increase.

DIP switch 11:

Selects which application is being used: potentiometer or joystick.

    ↑ Up (1) position for potentiometer applications.
    ↓ Down (0) position for joystick applications.

DIP switch 11 is only active when the EPOT is set up in velocity output mode. This switch determines how the EPOT will detect the zero-velocity position of the potentiometer or joystick attached to its analog input. The Up (1) position will calculate a midpoint location which provides zero velocity output when power is applied. The Down (0) position will assume the potentiometer or joystick is located in its midpoint or zero velocity position when power is applied

J1 Connector Pin-out:

J2 Pin-out (Single-ended version):

J2 Pin-out (Differential output version):