4 – EPOT 3 Wire Mode (Electronic Potentiometer)

In EPOT 3 wire mode, the control is operated by the opto isolated inputs and the analog command input. The opto inputs can be switches as shown in Figure 3-10 or logic signals from another device.

Figure 3-10 EPOT Connection Diagram

Note:

Speed Command = Analog1 + Analog2 + EPOT

Analog Input 1 = 0–10VDC Setpoint

Analog Input 2 = 4–20mA Setpoint

10KW Pot or

0-10VDC

Decrease

Increase

Stop

Run FWD

+24VDC

Speed Output

Pot Reference

Analog Input 2

Analog Input 1

Analog GND

10

9

8

7

6

5

4

3

2

1

Fault

RLY1A

RLY1B

1Analog GND. Reference for analog inputs.

2Setpoint 0–10VDC. Single ended analog voltage input, referenced to 1.

3Setpoint 4–20mA. Single ended analog current input, referenced to 1.

4+10VDC reference voltage for potentiometer.

5Analog output that represents the commanded speed output.

6+24VDC for Optical Inputs power.

7Momentary CLOSED starts motor operation in the Forward direction.

8Momentary OPEN motor decels to stop.

9Momentary CLOSED increases motor speed while contact is closed.

10Momentary CLOSED decreases motor speed while contact is closed. RLY1 Digital output that represents the fault status.

MN735

Receiving & Installation 3–15

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Image 26
Baldor MN735 manual Epot Connection Diagram