Parker 591C - Page 42

590 Series DC Digital Drive Installing the Drive
3-17
Power Connections continued
External AC Field
D1
D2
Connect the
external field
supply to
terminals D1
and D2.
If an external field supply is required by the drive for application reasons, connect this supply to terminals D1 and D2. The magnitude of
this voltage is determined by the desired field voltage. The supply must be protected externally with suitable fuses. Always derive the
supply from the Red and Yellow phases of the main power supply, with the Red phase connected to terminal D1 and the Yellow phase to
terminal D2.
To change the drive from an internal to an external field type refer to "
Motor Field Options", page 3-25.
IMPORTANT
The connection of the controller and the external field supply must be consistent when
using an externally supplied field regulator. Always derive the 1 phase, 50/60Hz supply
from the L1 (Red) and L2 (Yellow) phases of the main power supply, directly or indirectly
through a single-phase transformer, with the Red phase connected to terminal D1 and the
Yellow phase to terminal D2.
NOTE You must provide branch circuit and overload protection.
Auxiliary Supply
D7
D8
Connect the
control supply
to terminals
D7 and D8.
Single phase, 110/240V ac, 50/60Hz.
Note: The auxiliary supply chosen must equate to the contactor coil voltage used.
IMPORTANT
The auxiliary supply terminals must be connected directly to the incoming supply via a
fuse or circuit breaker. No series sequencing switches or contacts are permitted without
consultation from Parker SSD Drives.
Use suitable external fuse protection: the steady state current absorbed by the controller is nominal, the external fuse
is determined chiefly by considering the contactor holding VA and the controller cooling fans. (Frame H fans are
powered separately).
Refer to Appendix E: “Technical Specifications” - Power Supply Fuses.