SM800 DELTA ELEKTRONIKA BV
October 2007 OPERATING MAINTENANCE TROUBLE SHOOTING CALIBRATING Page 4 - 4
12) MASTER / SLAVE PAR AL LEL OP ER A TION
• Note: Mas ter / Slave par al lel is not rec om mended
for more than 4 units, con sult fac tory for us ing
more than 4 power sup plies in par al lel.
• First, con nect out put ter mi nals and test sys tem in
nor mal par al lel op er a tion. En sure that all power
con nec tions are re li able.
• Sec ond, switch off all units. To con nect the slaves with
the mas ter via CON B and CON C, use stan dard RJ45
con nec tors ac cord ing to fig. 4 - 11.
On all units put dipswitch 4 of SW1 in po si tion ON to set
the units in M/S par al lel mode. In this mode the DCF
LED, DCF re lay and DCF sta tus on the slaves are
dis abled be cause the slaves are al ways in CC mode.
• Af ter turn ing the units on again, the slaves will be in
Re mote CC 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.
• Stack the units to cre ate a min i mum dis tance be tween
the units. Keep the load close to the mas ter.
Use cop per strips (pre ferred) or short thick ca bles to
con nect the units. Make sure the strips are mounted
with a min i mum length to keep the volt age drop be -
tween a unit and the bus bar be low 10 mV. Also keep
the strips close to each other to have a low in duc tance.
Not fol low ing these in struc tions can cause in sta bil ity.
• The S- and S+ could be con nected to the load if
de sired, but this is not rec om mended be cause of the
com plex ity and pos si ble instability.
13) PAR AL LEL OP ER A TION OF FAST
PRO GRAMMING VER SIONS:
• Mas ter / Slave op er a tion is not rec om mended.
• Nor mal par al lel op er a tion can give prob lems, each
com bi na tion has to be tested first in com bi na tion with
the load.
14) MASTER / SLAVE MIXED SERIES /
PAR AL LEL OP ER A TION
• For com plex com bi na tions as mixed se ries - par al lel,
al ways use a MAS TER / SLAVE SE RIES ADAPTER.
• See fig. 4 - 12 for an ex am ple of how to con nect 2 units
in se ries in par al lel with 2 units in se ries, con trolled by 1
mas ter.
• Set the pro gram ming mode with the knob Re mote / Lo -
cal on the front panel. The se rial slaves must be in Re -
mote CV mode. The par al lel slave must be in Re mote
CC mode.
• Note: A Mas ter / Slave com bi na tion can al ways be
pro grammed, also with the IEEE488 / RS232 con trol ler
(PSC-448 / PSC-232 (both δ-prod ucts)).
fig. 4 - 11
Mas ter / Slave par al lel connections
fig. 4 - 12
Mas ter / Slave mixed se ries - par al lel connections
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