DELTA ELEKTRONIKA BV SM6000
Page 3 - 4 DESCRIPTIONS July 2003, rev. May 2008
17) RE MOTE SHUT DOWN (RSD)
A volt age of +4 V...+12 V on the Re mote Shut Down in put on the
programming con nector CON E will switch off the out put of the unit.
It is also pos sible to use a re lay con tact or a switch to shut the unit
down (see fig. 3 - 11).
In standby mode the power sup ply con sumes very lit tle power.
18)
IN TER LOCK
The In terlock con nector (CON A, rear panel) has 2 in puts which
have to be con nected together to turn on the out put of the unit.
As soon as the link be tween the 2 in puts of the In terlock con nector
is dis rupted, the out put of the unit shuts down.
It can be used in com bination with a cab inet door con tact (safety
precaution) or as an emer gency break to stop a mo tor which is
powered by the unit.
In case the link is dis rupted the RSD LED will light. In con trast with
Re mote Shut Down, also the DCF LED will be on, the DCF sta tus
will be high and the re lay con tact will change.
Once the in puts are connected again, the out put will be on.
No volt age may be ap plied to the pins in the Interlock connector.
19)
PRO GRAMMING SPEED
The rise and fall time is mea sured with a step wave form at the CV
prog. in put. Programming from a low to a high output voltage is
nearly load in dependent, but pro gramming down to a low voltage
takes more time on lighter loads. This is caused by the out put ca -
pacitors, which can only be discharged by the load be cause the
power sup ply can not sink current. With the Power Sink op tion,
also the pro gramming down speed is nearly load in dependent.
When hav ing a unit with a fast pro gram ming op tion, the rise and
fall time is 5 to 25 times faster (see datasheet). The pro gramming
source must be floating or oth erwise an ISO AMP CARD must be
used, a non-floating source will re sult in slope dis tortion.
When us ing fast pro gramming it is gen erally not recommended to
use re mote sens ing or se rial / par al lel op er a tion. Con sult fac tory for
advice. Note that the output rip ple is higher.
20)
PUL SATING LOAD
To avoid overheating the out put ca pacitors, the AC component of
the load cur rent should be limited (see fig. 3 - 12).
One method of de creasing the AC current through the output ca -
pac i tor is by us ing a large ex ter nal elec tro lytic ca pac i tor in par al lel
with the load. Care must be taken so that the ca pacitor in combina-
tion with the lead in ductance will not form a series resonant cir cuit!
When us ing re mote sens ing on a pul sating load (for in stance a
DC-motor), use a ca pacitor in se ries with a re sistor over the load
(see fig. 3 - 13). Like this the AC-component caused by the pul sat-
ing of the load is fil tered.
Note: in case of a pul sat ing load, the I mon itor voltage will not ex -
actly match the out put cur rent. This is mainly caused by the current
through the out put ca pacitors. Re mote sensing will worsen this ef -
fect.
21)
IN SU LA TION
For safety the in su la tion of the sep a rat ing com po nents (trans form -
ers) be tween in put and out put is tested at 3750 Vrms dur ing 1 min -
ute. This is tested be fore as sembly.
Warn ing! The 3750 Vrms can not be tested af terwards on the
as sem bled unit be cause the in su la tion be tween the com po nents
on the in put side to the case (like the bridge rec tifier) is spec ified at
2500 Vrms. Since the in su la tion out put - case is low (only 600 V DC)
the in sulation of the pri mary components to case will break down
when 3750 Vrms is ap plied be tween in put and out put (2500 Vrms +
600 VDC < 3750 Vrms) (see also fig. 3 - 14).
Note: when testing the in sulation, take care to charge and dis -
charge the capacitors be tween in put - case and out put - case
slowly (e.g. in one sec ond). This to prevent high peak currents,
which could de stroy the power sup ply. Make sure to discharge the
ca pac i tors com pletely be fore us ing it again.
fig. 3 - 11
Re mote Shut Down us ing a relay contact
fig. 3 - 12
Pulsating load current
fig. 3 - 13
Remote sensing on a pulsating load
fig. 3 - 14
In su la tion test voltages
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