MASTER SLAVE
SM15K INTERFACES
7 / 19
DELTA ELEKTRONIKA B.V.
rev. Nov. 2019
o
The Master has a specific location in the system, depending
on the number of Slaves. Although in a later stage the
functional assigned is done via the unit's menu, it is required
to do the physical assignment first; at which location will the
Master be and at which the Slave(s).
o
For an uneven number of units, position the Master in
between an equal number of slaves.
o
For example in a set of 7 units, the upper 3 units must be
slaves, the master in position 4, and below it another 3
slaves.
o
For an even number of units, position the master in such a
way that under it there's 1 slave more than above it.
o
For example in a set of 8 units, the upper 3 units must be
slaves, then the master, and below it another 4 slaves.
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Connect the copper strips.
o
See example drawings for different number of units in the
. See fig 3 - 2.
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Remove safety covers from the DC power terminals.
o
Remove the M8 bolts from the DC power terminals.
o
Important: follow the exact order of washers, lock washers,
etc. to ensure correct and safe operation.
o
Use the thin crinkle washer "M8 SZ DIN137B" between the
bolt head and the terminals for maximum isolation distance
b and -. This replaces one of the standard flat
washers.
o
Use one of the standard flat washer "M8 A2 DIN125A" +
lock washer "M8 A2 DIN127B" between the strips and the
"M8 A2 DIN934" nuts.
o
Note: for easy assembly, first insert the bolts with crinkle
washers in all
–DC power terminals. Then assemble the
strip to the +DC power terminals. This because
bolts cannot be inserted in the
–DC power terminals once
the + strip is in place.
Connect the load cables.
o
The load cables must be connected as close as possible to
the master at the position indicated on the drawings in the
application note.
o
When a second set of load cables is required, connect them
to the Slave below the Master.
o
Place the lugs directly on the strips - never place a washer
between a cable lug and a copper strip because it will burn
out.
o
Place the special M/S parallel safety covers over the output
terminals.
o
Cover with marking DWG2532 is for the outputs of the
upper and lower units. Cover DWG2533 is for units in
between them.
o
Create openings for the load cables where necessary.
3.4.3
DC POWER CONNECTIONS FOR M/S-SERIES
It is strongly advised to use one of the M/S SER kits from
Delta Elektronika for best and safest results!
o
These kits include special copper bars, bolts, nuts, specific
washers, patch cables and extra safety covers.
o
The basic kit M/S SER SET BA is for 2 units.
o
For each extra unit, an extra kit M/S SER SET BB is
required.
o
more information.
Place all the units in a 19 inch rack.
o
Remove the input covers from the units.
o
Remove the mains supply cables.
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Insert the units in the rack.
o
Stack the units with minimum spacing in between them.
o
Distance between sets of output terminals is 3U =
133.35mm.
Assign a unit as Master.
fig 3 - 2
Examples of DC-connections for Parallel and Series
operation are available in the M/S application notes.
