Parker 890SD - 890 CD Minimum Control Connections

890CS & 890CD Common Bus Units
Page 4-24 890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames B, C & D
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E
890CD Minimum Control Connections
Minimum Connections
♦ Connect X14/04 to a clean,
external earth
Speed Reference
♦ Connect a 10kΩ
potentiometer at terminal
X12:
X12/01 : Low (CCW)
X12/04 : Wiper
X12/08 : High (CW)
♦ Connect the shield to
earth/ground at the control
bracket.
OR
♦ External 2-wire speed
reference between:
X12/01 : negative
X12/04 : positive
♦ Connect the shield to
earth/ground at the control
bracket.
Sequencing
♦ RUN (maintained contact)
X14/03 : 24V
X15/02 : RUN
890CD COMMON BUS DRIVES
24V DC
Speed
Potentiometer
Start
External
Reference
Start
Control bracket
for terminating all
control wiring shields
24V DC24V DC