Rockwell Automation SA3100 AC Power Modules - Manual (Page 38)

3-20 SA3100 Power Modules
3.12 Installing an Emergency Stop
The user must provide a hardwired emergency stop external to the drive. The
emergency stop circuit must contain only hardwired electromechanical components.
Operation of the emergency stop must not depend on electronic logic (hardware or
software) or on the communication of commands over an electronic network or link.
Note that switching the disconnect during operation, particularly opening the contacts
while the drive is running, should be prevented. This can be accomplished by using
the MCR output contacts in conjunction with the drive’s RPI input, which will turn off
the output power devices before opening the contacts.
Output contactors may be placed in series with the motor leads if the motor must be
isolated from the Power Module in an emergency stop. Opening the contacts while the
drive is running should be prevented.
3.13 Connecting the Motor
A variety of cable types are acceptable for SA3100 Power Module installations. For
many installations, using separate conductors or unshielded cable is adequate. Signal
wire for sensitive circuits must be run in separate conduit and be physically separated
from inverter output cables. As an approximate guide, allow a minimum separation of
0.3 meters (1.0 ft) between cable types.
Motor cable should be 3-conductor with ground. The ground leads should be
connected directly to the Power Module ground terminal (PE) and to the motor frame
ground terminal.
Separation of motor leads into separate conduit or raceways is not recommended.
Phase U, V, and W output leads should be grouped together in cables and/or conduit.
3.13.1 Using Shielded Cable
Shielded cable is recommended if sensitive circuits or devices are connected to, or
mounted on, the machinery driven by the motor. The shield must be connected to both
the drive ground (at the Power Module end) and to the motor frame ground (at the
motor end) to minimize interference. See Appendix D.
!
ATTENTION: The user must provide an external, hardwired emergency
stop circuit outside of the drive circuitry. This circuit must disable the
drive system is case of improper operation. Uncontrolled machine
operation may result if this procedure is not followed. Failure to observe
this precaution could result in bodily injury.
ATTENTION: SA3100 drives are controlled by input signals that start and
stop the motor. A device that routinely disconnects and then reapplies
power for the purpose of starting and stopping the motor must not be
used.
ATTENTION:When input power is removed, there will be a loss of
inherent regenerative braking effect and the motor will coast to a stop.
An auxiliary braking method may be required.