Rockwell Automation SA500 DC Bus Supply - Manual (Page 21)

Installation Guidelines 3-7
Step 2. Rotate the quarter-turn cover fasteners and remove the bus supply’s front
cover. Check the bus supply’s nameplate to ensure that the bus supply has
the proper power rating (50A or 100A).
Examine jumper W1 on the printed circuit board (see figure 3.2). The jumper
must be set to position B for the bus supply to operate properly. This is the
factory setting. When the jumper is set to position B, the bus supply will be
enabled whenever the correct three-phase input voltage is present.
Step 3. Connect the input power wiring per the NEC and local wiring codes as shown
in figure 3.3. A fuse disconnecting switch must be placed in the AC line that
feeds the DC bus supply. Select the proper value of short circuit protection
fuse from table 3.3. Minimum/maximum input wire sizes are given in table
3.4. The phasing of the three-phase input lines (L1, L2, L3) is not critical. The
proper DC bus polarity, however, must be observed. Be sure to connect the
grounding stud (GND) to earth ground (PE) as shown in figure 3.3.
Wires for connecting the DC bus and the Power Module are normally
provided with engineered systems. Do not substitute other wires for those
supplied. The wires are 225 mm (8.8 in) in length.
Do not over-tighten the nuts on the DC bus terminals. Use a nut-driver only
and limit the torque to 4.0 Nm (36 lb-in).
Figure 3.2 – Jumper W1
!
ATTENTION: Fuse disconnecting switches are not designed to be
opened under load. Turn off the drive before opening the switch. Failure
to observe this precaution could result in damage to, or destruction of,
the equipment.
1
4
A
B Jumper W1
DC Bus Supply
PC Board
(Component Side)
LEDs
A
B
1
2
3
4
Fault Contact Output
Not Supported }
}
Interface
Connector
(TB1)