Specifications

Section 1—Installation & Configuration Bulletin No. VVDED397044US R12/00

Bus Voltage Measurement Procedure December 2000

BEFORE INSTALLING THE OPTION CARD

Before installing, removing, or replacing the MODBUS PLUS option card,

remove all power from the drive controller, including external control

power that may be present on the option module, and perform the “Bus

Voltage Measurement Procedure” on page 8.

BUS VOLTAGE MEASUREMENT PROCEDURE

Before installing the VW3A58302U communication card, measure the

bus voltage as described in this section.

The DC bus voltage level is determined by monitoring the (+) and (–)

measurement points. Their location varies by drive controller model

number as listed in Table 5 on page 9. The drive controller model number

is listed on the nameplate.

UNINTENDED EQUIPMENT ACTION

Read and understand documents VVDED397048US and

VVDED397047US before operating the drive controller.

Failure to follow this instruction can result in death, serious

injury, or equipment damage.

WARNING

DANGER

HAZARDOUS VOLTAGE

• Read and understand the bus voltage measurement procedure

before performing the procedure. Measurement of bus capacitor

voltage must be performed by qualified personnel.

• DO NOT short across capacitors or touch unshielded

components or terminal strip screw connections with voltage

present.

• Many parts in this drive controller, including printed wiring boards,

operate at line voltage. DO NOT TOUCH. Use only electrically

insulated tools.

Electrical shock will result in death or serious injury.