4-19
890CS & 890CD Common Bus Units
890CS Common Bus Supply - Frames B & D; 890CD Common Bus Drive and 890SD Standalone Drive - Frames E & F
Key to Wiring Diagram
K
Motor
(M1, M2, M3)
The motor used must be suitable for Inverter duty. Ensure wiring is rated for highest
system voltage. Refer to Appendix E.
L
3
∅
Power Supply Cable
(L1, L2, L3)
Ensure wiring is rated for highest system voltage.
Refer to Appendix E.
M
Metal Work Earth
Use the back panel for this earth. It provides earthing points for all parts of the cubicle
including doors and panels. Connect cubicle to earth/ground via cubicle PE terminal.
P
Fuse or Type B RCD
(AC Input Fuse)
Fuse rating - refer to Appendix E. We don't recommend the use of circuit breakers (e.g.
RCD, ELCB, GFCI), but if their use is mandatory, use only a Type B RCD.
R
Line Reactor (mandatory)
A 3% line reactor MUST be fitted to the 890CS unit.
S
Signal/Control Screen Earth This must be insulated from the back panel. Connect any signal/control screened cables
which
do not
go directly to the drives.
T
24V Power Supply
(mandatory on 890CS)
A 24Vdc power supply.
V
Fuse
(DC Supply Fuses)
Protect DC+ and DC- cabling with fuses. Fuse rating - refer to Appendix E.
W
3 Phase AC Contactor
(mandatory on 890CS)
3 Phase AC Contactor used to isolate the 890CS unit for long periods.
The ENABLE contact (X02/03) is intended as an aid to functional sequencing only
and must NOT be used as the main system disable.