EQ7 Series Instruction Manual - TECO-Westinghouse Motor Company

Wiring for control circuit terminals
For EQ72125-C, EQ72150-C and EQ74250-C to EQ741000-C
(1) As shown in Figure 2.19, route the control circuit wires along the left side panel to the outside of the inverter.
(2) Secure those wires to the wiring support, using a cable tie (e.g., Insulok) with 0.15 inch (3.8 mm) or less in width
and 0.059 inch (1.5 mm) or less in thickness.
Cable tie
Wiring support
Control circuit terminal block
Wiring for control
circuit terminals
Section A
Details of Section A
Left side panel
Wiring for control
circuit terminals
Figure 2.19 Wiring Route and Fixing Position for the Control Circuit Wires
- Route the wiring of the control circuit terminals as far from the wiring of the main circuit as possible.
Otherwise electric noise may cause malfunctions.
- Fix the control circuit wires with a cable tie inside the inverter to keep them away from the live parts of the
main circuit (such as the terminal block of the main circuit).
2.3.6 Setting up the slide switches
Before changing the switches or touching the control circuit terminal symbol plate, turn OFF the power and wait at
least five minutes for inverters of 40 HP or below, or at least ten minutes for those of 50 HP or above. Make
sure that the LED monitor and charging lamp are turned OFF. Further, make sure, using a multimeter or a similar
instrument, that the DC link bus voltage between the terminals P(+) and N(-) has dropped to the safe level (+25 VDC
or below).
An electric shock may result if this warning is not heeded as there may be some residual electric charge in
the DC bus capacitor even after the power has been turned OFF.
Switching the slide switches located on the control PCB allows you to customize the operation mode of the analog
output terminals, digital I/O terminals, and communications ports. The locations of those switches are shown in Figure
2.20.
To access the slide switches, remove the front cover so that you can see the control PCB. For inverters of 50 HP or
above, open also the keypad enclosure.
For details on how to remove the front cover and how to open and close the keypad enclosure, refer to Section
2.3.1 "Removing and mounting the front cover and the wiring guide."
2-25