3
550-921
Contents of kit
1. end mouldings (carbon loaded polypropylene)
2
2. pcb retainers (ABS)
4
3. nut holders (ABS)
4
4. spacer rails (extruded aluminium - plain)
2
5. wall mounting brackets (ABS)
2
6. M4 x 16 cheesehead steel screws
10
7. M4 washers
4
8. M4 nuts
10
9. 0.187in (4.75mm) spade terminals
2
Initial assembly
Refer to figures 1 & 2 before proceeding. Note that the references
assigned to each component correspond to those used in the contents
list above. If assembling more than one kit with the object of increasing
height or depth, refer first to the instructions headed ‘stacking’.
1.
Place a nut (8) into the hexagonal recess in a nut holder (3).
2.
Fit a washer (7) to a screw (6).
3.
Place the nut holder into a groove in an end moulding (1) so that
the tab on the nut holder engages in the slot.
4.
Insert the screw through the elongated slot in the end moulding,
engage with the nut and commence tightening (it will be
necessary to prevent the nut coming out of its holder while
tightening the screw). Continue tightening the screw until the nut
holder is restricted to about 2mm of vertical movement in the
groove.
5.
Repeat 1-4 for the remaining 3 nut holders. The spade terminals
(9) may be fitted under the heads of two screws if required.
6.
Slide the open end of a spacer rail (4) over one of the nut holders,
until flush with the outside edge of the end moulding. Tighten the
screw to retain the spacer rail. Repeat with the second spacer rail
over the other nut holder on the same end moulding.
7.
Slide the nut holders on the second end moulding into the open
ends of the two spacer rails, ensuring that the pcb slots in the end
moulding face each other. Set to the required distance between
the end mouldings corresponding to the width of the pcb’s to be
handled, and tighten the remaining two screws.
8.
Refer to figure 2 and fit one pcb retainer (2) to each end
moulding. Note that the spigots (U) and ledge (V) on the pcb
retainers engage with holes (Q) and slot (W) respectively in the
end mouldings.
Application recommendations
If the rack is to be used for more than one size of pcb, fully tighten the
screws at one end only, and leave those at the other end sufficiently
loose to permit the end moulding to move under firm pressure.
When the rack is set for continuous use with one size of pcb, the
excess length of the spacer rails may be sawn off, and the wall
mounting brackets (5) may be utilised if required.
If a rack is to be used for pcb’s fitted with static sensitive computers, eg
MOS devices, the rack should be electrically connected to the
appropriate ground reference point via the 0.187in spade terminal
provided and a suitable length of wire.
Wall mounting
Note that when the wall mounting brackets are used, the pcb’s will be
held horizontally and the hook on the wall mounting bracket engages
with the upper projection (T) on the end moulding. Four slots (X) are
provided in each wall mounting bracket to accept retaining screws.
Ensure that the brackets are solidly screwed to the wall. No.6
roundhead wood screws into RS wall plugs (RS stock no. 525-414) are
recommended.
Transportation
If a loaded rack is likely to be inverted, transported by road, or
subjected to any sort of treatment which could result in pcb’s falling out
of the rack, then the pcb’s may be retained by fitting the spare pair of
pcb retainers (2) to the handles of the end moulding; the spigots of the
retainers being inserted into holes (P) in the end moulding, with the flat
face of the retainer downwards.
Always carry loaded racks by the handles only.
Stacking (general)
Racks may be screwed together to increase height, width or depth.
When increasing the width of an assembly the relative widths of the two
racks is immaterial, and already assembled racks may be screwed
together without dismantling. However, when increasing the height or
depth of an assembly it is necessary to first remove the spacer rails.
Use the spare screws and nuts from the rack kits to screw the
mouldings together. Washers should not be used. Tighten the screws
evenly but do not over-tighten. Refer to figure 2.
If increasing height or depth of existing racks first slacken, but do not
remove, the screws (6) figure 1 and remove the spacer rails. Follow the
appropriate instructions below, then proceed to paragraph 6 under the
heading ‘Initial Assembly’.
If newly assembling more than one rack kit with the objective of
producing an assembly of increased height or depth, follow the
appropriate instructions below, then proceed to paragraph 1 under the
heading ‘Initial Assembly’.
To increase width
Ensure that the spacer rails do not protrude beyond the mating (outer)
edges of the mouldings. Place the mating faces side by side. Note that,
of the four holes (S), two are provided with spigots and two with
matching recesses. When correctly mated, with each spigot in the
opposing recess, screw the end mouldings together through holes (S).
Note that the nuts are held against rotation by the opposing hexagonal
recesses. (Since the hexagonal recesses are provided in all holes (S)
there is no preferred direction for fitting the screws)
To increase height
Engage the handle of one end moulding into the handle recess of the
second end moulding, ensuring that the pcb retaining slots are both on
the same side the resultant sub-assembly. Screw the two mouldings
together by passing the screws (6) through the holes (Q) on the pcb slot
side of the upper moulding, the nuts being held against rotation by
hexagonal recesses in the outer side of the lower moulding. Repeat for
the other pair of mouldings.
To increase depth
Engage the oval projections surrounding holes (R) on one end
moulding into the matching recesses in the second end moulding.
Screw the mouldings together by passing the screws through holes (R)
in the pcb slot side of the mouldings, the nuts being held against
rotation by hexagonal recesses in the outer side of the mouldings.
Repeat for the other pair of mouldings.
RS Components shall not be liable for any liability or loss of any nature (howsoever
caused and whether or not due to RS Components’ negligence) which may result
from the use of any information provided in RS technical literature.
RS
Stock No.
V6282