Rockwell Automation 2LW3000 LonWorks Communication Option Module for VTAC 7 Drives - Manual (Page 26)

3-12 LonWorks Module for VTAC 7 Drives
If the drive is panel-mounted, this procedure will be easier to perform if the drive is
removed from the panel.
Unless otherwise indicated, keep all hardware that is removed. You will need it for
reassembly. This includes screws, lock washers, and rivets.
Important: Read and understand the warning labels on the outside of the drive
before proceeding.
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 shown in figure 3.5.
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 M4 x 10 screws that fasten the
bottom of the keypad support bracket to the drive.
Figure 3.5 – DC Bus Voltage Terminals (1 to 20 HP @ 230 VAC)
W/T3 V/T2 U/T1
+
S/L2
Motor Leads AC Power
Input Leads
DC Bus
Volts
R/L1 T/L3
–