
890CS & 890CD Common Bus Units
4-30
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames E & F
8
9
10
11
A
B
C
D
1
2
3
5
6
7
E
Minimum Connections
♦
Connect X14/04 to a clean, external
earth
Safe Torque Off
♦
To disable STO:
Connect X11/01 and X11/03 to
X14/03.
Connect X11/04 to X14/04
Speed Reference
♦
Connect a 10k
Ω
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 Minimum Control Connections