4. Installation
MV3DB Series DB Units
ALSPA MV3000e Dynamic Braking Units
(07/06)
Page 4-16
Frame Size 6 Installation
(Refer to Figure 4-10)
Note:
Torque all M10 nuts and bolts to 30 Nm (265 lbf in).
1.
The ribbon cable has been folded inside the DB Unit for transportation purposes.
Release the free end of the ribbon cable so that it hangs out of the front of the DB Unit.
Slide the DB Unit into the drive chassis, ensuring that the top and bottom edges of the
DB Unit are located correctly in the guides (2) as shown in Figure 4-10 (A). Ease the
bottom busbar (3) over the DC– stud (17) and slide fully into position.
2.
Release the control board as follows:
i.
Open the hinged plastic shroud (7) by releasing the retained M5 screw (8).
ii.
Remove the M5 screw and spring washer (5) securing the bottom of the control
board to the drive chassis.
iii. Remove the M5 screw and spring washer (9) securing the top of the control board
to the drive chassis.
iv. Withdraw the control board approximately 25 mm (1 in).
3.
Run the DB Unit ribbon cable (11) through the clip (10) on the drive chassis. If the clip is
missing, fit the clip supplied with the DB Unit. The location of the clip is shown in
Figure 4-10 (B). Connect the ribbon to PL8 (1) on the control board.
4.
Re-fit the control board into the drive, using the procedure in step 2 (i) to (iv) in reverse
order.
5.
Secure the DB Unit to the DC+ busbar, using an M10 hex head bolt, spring and flat
washers (16) (supplied in the DB Unit kit). Torque as shown above.
6.
Secure the DB Unit to the DC– stud (17), using an M10 nut, spring and flat washers
(18). Torque as shown above.
7.
Re-fit the fan access panel (15) into position, easing it past the BR stud (12) and the
DC– busbar (17). Check that the panel does not trap cables at the top or bottom. Secure
with eight M5 taptite screws (14), starting with the centre screw on the left edge.
8.
Re-fit the M5 taptite screw securing the blanking plate to the top of the drive.
9.
Re-fit the transparent plastic shroud (4), using three M5 taptite screws (20).
10.
Position the link (21) between the RECT+ stud (6) and the DC+ stud (19). Secure the
link to the RECT+ stud (braking resistor cable to be fitted to the DC+ stud later), using
an M10 nut, spring and flat washers (22).
11.
At the top of the drive, cut open plastic fingerguard (13) to allow the braking resistor
cables to enter the drive.
12.
Secure the crimp of one DB resistor cable to the DC+ stud (19), using an M10 nut,
spring and flat washers. Torque as shown above.
13.
Secure the crimp of the other DB resistor cable to the BR stud (12) on the DB Unit,
using an M10 nut, spring and flat washers. Torque as shown above.
