ESWITCH ENCODER SPEED/POSITION SENSING SWITCH

• The ESWITCH is normally powered through the power connector, but it may also be powered via J1, pin 5.

DIP Switch SW11 = "up" for this mode.

In speed sensing mode, the relay will activate for approximately 1 second when the sensed RPM is equal to or greater than the RPM threshold. DIP Switches SW1 to SW10 are used to set the threshold value. The output relay has both normally open and normally closed contacts available to the user.

The CPR of the encoder must be chosen according to the desired RPM range: 

DIP switch SW10,SW9,SW8 setting:

Calculate the PRESET value from the desired RPM threshold, RPMT and the encoder CPR using the formula:

PRESET = 1920 / (RPMT * CPR)

Look up the SW10/SW9/SW8 setting based on the PRESET value using the table below and note the corresponding PREOUT constant value. If PRESET is outside the range of the table, lower the encoder CPR to get the value within range.

 DIP Switch SW7 to SW1 setting:

Calculate the offset value as shown below:

OFFSETV = ( (RPMT * CPR * PREOUT) / 15 ) - 128

Convert the OFFSETV to binary and enter the value on SW7 to SW1.  SW7 is the most significant bit. DIP Switch down = 0 and DIP Switch up = 1

DIP Switch SW11 = "down" for this mode.

In this mode, an internal up / down counter will decode quadrature states and track the position of the external encoder. DIP switches SW1 through SW7 allow the user to set the number of counts from 1 to 127 in binary. SW7 is the most significant bit. DIP Switch down = 0 and DIP Switch up = 1. The relay will be activated for about 1 second when the counter deviates from the current position by the programmed count value. The counter will auto-reset to zero whenever the trigger point is reached. The output relay has both normally open and normally closed contacts available to the user.

Example:
If the DIP switches are set to 12 in binary, then the relay output will be activated for 1 second when the shaft rotates 12 quadrature states in either direction.  The shaft will need to deviate from the current position by 12 quadrature states to activate again.

Encoder Input/Output

J1 Connector

PS-12 Power supply