Rockwell Automation 2090 Ultra3000 Installation Manual - Manual (Page 40)

Publication 2098-IN003E-EN-P — April 2004
1-16 Installing Your Ultra3000
External Shunt Resistor
Observe the following guidelines when mounting your external shunt
resistor (refer to Figure 1.9 and for an example).
• Mount circuit components and wiring in the very dirty zone or in
an external shielded enclosure. Run shunt power and fan wiring
inside metal conduit to minimize the effects of EMI and RFI.
• Mount resistors (other than metal-clad) in a shielded and
ventilated enclosure outside the cabinet.
• Keep unshielded wiring as short as possible. Keep shunt wiring as
flat to the cabinet as possible.
Figure 1.9
External Shunt Resistor Outside the Enclosure
C
C
VD
1394 Digital Servo Controller
300W Shunt Module
BULLETIN 1394 300W SHUNT MODULE ALLEN-BRADLEY
FOR USE WITH 1394-SJT22-X SYSTEM MODULE
CAT. PART SER. INPUT DC INPUT AC FOR FUSE REPLACEMENT USE:
BUSSMAN CAT. NO.
R
D
D
VD
D
D
D
Motor
DC Bus
100-240 VAC 50/60 Hz
L1 AUX
L2/N
AUX
L2/N
L1
-
+
W
V
TB1
External Shunt 3
2
1 Internal
TB2
U
Dirty Wireway Clean Wireway
Motor Power Cable
Very dirty shunt connections
segregated (not in wireway).
Maximum Length: 3.05 m (10 ft).
Route Motor Power
Shielded Cable Route Encoder/Analog/Registration
Shielded Cables
Customer-supplied
metal enclosure
150 mm (6.0 in.) of
clearance on all sides
of the shunt module
minimum
Metal conduit
(where required by local code)
Enclosure
Shunt Wiring Methods:
Twisted pair in conduit (1st choice).
Shielded twisted pair (2nd choice).
Twisted pair, 2 twists per foot min. (3rd choice).
24V
Power Supply
Circuit
Breaker
XFMR
AC
Line Filter
DC
Filter
Contactors
Ultra3000
Very dirty power connections
segregated (not in wireway)