Rockwell Automation 2LW3000 LonWorks Communication Option Module for VTAC 7 Drives - Manual (Page 18)

3-4 LonWorks Module for VTAC 7 Drives
Step 1. Shut Down the Drive
Step 1.1 Disconnect, lock out, and tag all incoming power to the drive.
Step 1.2 Wait five minutes for the DC bus capacitors to discharge.
Step 1.3 Remove the cover by loosening the four cover screws.
Important: Read and understand the warning labels on the inside of the drive before
proceeding.
Step 2. Verify That the DC Bus Capacitors are Discharged
Step 2.1 Use a voltmeter to verify that there is no voltage at the drive’s AC input
power terminals (R/L1, S/L2, T/L3).
Step 2.2 Ensure that the DC bus capacitors are discharged. To check
DC bus potential:
a. Stand on a non-conductive surface and wear insulated gloves.
b. Use a voltmeter to measure the DC bus potential at the DC bus power
terminals as shown in figure 3.1.
Step 3. Remove the Keypad Bracket from the Drive
Step 3.1 Record connections to the Regulator board terminal strip if they must be
disconnected to remove the keypad bracket.
Step 3.2 Use a magnetic screwdriver to remove the three M4 x 10 screws that fasten
the bottom of the keypad support bracket to the drive heat sink.
Important: The keypad support bracket is connected to the drive by wiring. Do not lift
the bracket out completely, because this can damage or pull out wiring.
Step 3.3 Spread the retaining clips on the 26-conductor Regulator board ribbon cable
connector to disconnect it from the Current Feedback board. The Current
Feedback board is located on the right below the keypad.
Step 3.4 Move the keypad support bracket aside.
Step 3.5 Pinch the retaining clip that is through the center of the Current Feedback
board and carefully pull out the Current Feedback board.
Step 3.6 Unplug the internal fan assembly power connector (CONN7) from the drive.
Figure 3.1 – DC Bus Voltage Terminals (1 to 5 HP @ 460 VAC)
W/T3 V/T2 U/T1
+
S/L2 10V 10 COM
Motor Leads
AC Power
Input Leads
DC Bus
Volts
R/L1 T/L3
– + –