Rockwell Automation 1397 DC Drive Firmware 2.xx - Manual (Page 95)

4–23 Start–Up and Adjustment
Publication 1397-5.0 — June, 2001
!
ATTENTION: The user must provide external field
current loss detection and inhibit Drive operation via
one of the Drive interlocks when Jumper J20 is
positioned to disable. Misapplication of this jumper can
cause the motor to run at dangerously high speeds.
Failure to observe this precaution could result in bodily
injury and/or equipment damage.
To detect complete loss of field current, place the jumper on pins 1
and 2 (Enable). When a complete loss is sensed, a fault is generated
and the Drive is coast stopped.
To ignore field loss, place the jumper on pins 2 and 3 (Disable). Any
loss of field current is ignored. Use the Disable option only when no
field exists, such as with a permanent magnet motor or when a
separate field supply is used.
IMPORTANT: Jumper J20 has no effect if a Regulated Field
Supply is installed. No fault is generated with a Regulated Field
Supply.
Setting the Drive for the Enhanced Field Supply (Jumper J21)
IMPORTANT: This jumper has no effect on the standard field
supply or the optional Field Current Regulator kit.
The Field Supply Jumper (J21) determines the voltage range that the
Drive expects to see from the optional Enhanced Field Supply kit.
Refer to the instructions supplied with the kit for more information
on the Enhanced Field Supply.
The DC voltage range can be either from 45 to 90% or from 90 to
112.5%.
To set the Drive for a voltage range of 45 to 90%, place the jumper
on pins 1 and 2.
To set the Drive for a voltage range of 90 to 112.5%, place the
jumper on pins 2 and 3.