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DELTA ELEKTRONIKA BV
case a large elec tro lytic ca pac i tor (Cd) in se ries with a
damp ing re sis tor (Rd) both in par al lel with the load will help
(see fig. 4 - 6). Check that the ca pac i tor Cd in com bi na tion
with the load leads and re sis tor Rd forms a well damped cir -
cuit.
Since the volt me ter is in ter nally con nected to the sens ing
•
ter mi nals, it will au to mat i cally in di cate the volt age on the
load. Note that the volt age mea sured on the load will be
lower than on the out put ter mi nals.
The Over Volt age Limit mea sures the volt age on the out put
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ter mi nals, so the OVL set ting should be in creased by the
to tal volt age drop in the load leads.
BAT TERY CHARGER
9)
The CV / CC reg u lated power sup plies are ideal bat tery
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charg ers. Once the out put is set at the cor rect volt age the
bat tery will charge con stantly with out over charg ing.
This can be use ful for emer gency power sys tems.
Pro tec tive mea sures
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Use a CIR CUIT-BREAKER in se ries in or der to pro tect the
power sup ply from ac ci den tal re verse con nec tion (see
fig. 4 - 8). The cir cuit-breaker should have a DC volt age rat -
ing twice the bat tery volt age. Use the very fast type (Z), a
type meant for pro tect ing semi con duc tors (see ta ble 4 - 2).
The unit has a re verse di ode in par al lel with the out put, this
di ode and the wir ing can not with stand the thou sands of
am peres sup plied by a wrongly con nected bat tery.
RE MOTE SHUTDOWN
10)
The Re mote Shut down can be op er ated on CON E by a
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volt age of +4V...+12V or by a re lay con tact be tween Vref
and Re mote Shut Down (pin 9 and 5) (see fig. 4 - 9).
When the unit is pro grammed with an op tional PSC, a
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soft ware com mand can be used for Re mote Shut down.
In the Re mote Shut down con di tion, the RSD LED will light.
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The DCF LED, DCF sta tus and the DCF re lay will be off.
Im por tant: If the link from the In ter lock con nec tor (CON A)
has been re moved, the RSD LED will be on, but in this
con di tion also the DCF LED, the DCF sta tus and the DCF
re lay will be on.
MASTER / SLAVE SERIES OP ER A TION
11)
Con nect out put ter mi nals and test sys tem in nor mal
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se ries op er a tion. En sure that all (out put) power con nec -
tions are re li able.
The volt age drop in the con nect ing leads be tween the units
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should be kept < 10 mV.
Switch off all units. Con nect units as shown in fig. 4 - 10.
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To con nect the slaves with the mas ter via CON B and CON
C, use stan dard UTP ca bles (RJ45).
On all units put dipswitch 4 of SW1 in po si tion OFF to set
the units in M/S se ries mode.
Af ter turn ing the units on again, the slaves will be in Re mote
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CV mode and the Keylock, see pre vi ous para graph 2) is ac -
ti vated. This is be cause the unit au to mat i cally de tects the
pres ence of the RJ45 con nec tor in CON C (if this ca ble is
con nected to an other unit).
If the RJ45 con nec tor is re moved from CON C when the
unit is turned on, the out put will shut down to avoid
ac ci den tal dam age.
If the ca ble is in serted when the unit is turned on, the out put
shuts down, the unit changes to Re mote CV / CC, the
Keylock will be ac ti vated and the out put will turn back on.
If dipswitch 4 of SW1 is op er ated when the unit is turned on,
the out put will shut down to avoid ac ci den tal dam age.
The max. num ber of slaves is only lim ited by the max. to tal
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volt age of 600 V.
Page 4 - 3
OPERATING MAINTENANCE TROUBLE SHOOTING CALIBRATING
Sug gested Cir cuit Breakers for pro tec tion power sup ply
Model
Type num ber
Cir cuit Breaker
SM7.5-80
S281 UC-B 100 ABB
SM18-50
S281 UC-Z 63 ABB
SM70-AR-24 S281 UC-Z 25 ABB
SM400-AR-4 S281 UC-Z 6
ta ble 4 - 2
Cir cuit break ers for pro tec tion.
fig. 4 - 8
Charg ing bat tery with a cir cuit-breaker in se ries
fig. 4 - 9
Re mote shut down with switch
fig. 4 - 10
Mas ter / Slave se ries con nec tion
SM800
Brand Re marks
-
-
-
ABB
ex tra par al lel di ode
on out put needed.
2x BYT261in series
October 2007
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