Concept Of The Mn7002 Power Supply - Siemens Cerberus MN7002 Manual

1

Concept of the MN7002 power supply

Consists of
≤10A
115V 29V
AC
B2F020
230V
AC
B2F020 converter
E3C021 battery charging
module
Operating modes
Earthing
Overvoltage protection
Mains back-up fuse
Fire & Security Products
Siemens Building Technologies Group
n Converter B2F020,
n Battery charging module E3C021,
n Batteries, depending of required emergency power capacity.
E3C021
DC 2× 12V
≤40Ah
≤6A
Control unit
various
loads
mains voltage Ü 29.6V
115/230V
AC
current limitation, short-circuit proof,
requires no special cooling,
temperature fuse,
metal housing.
for emergency power lead batteries 2× 12V ≤40Ah (24h charge):
charging current up to 1.7A,
selectable charging caracteristics depending on battery model,
symmetry monitoring,
automatic battery load test,
temperature compensation for battery charging voltage via external temperature sen-
sor.
a) Battery operation and symmetry monitoring
b) Battery operation without symmetry monitoring
c) Operation with external voltage (instead of battery)
d) Operation without battery or external voltage
Choice of earth according to equipment supplied,
– earth-free,
– positive to earth,
– negative to earth (not recommended).
Additional surge protectors are only required in special cases e.g. where there is a partic-
ular lightning hazard, overhead power lines etc. (see Z3I04, Z3I121).
The mains feeder must have an own and clear labelled fuse up to 10A.
≤10A
115V 29V
AC
B2F020
230V ≤6A
AC
system voltage, ≤6A continuous current:
DC
E3C021
DC 2× 12V
≤40Ah
Control unit
various
loads
E3C021
2× 12V
≤40Ah
various
loads
E3C021
2× 12V
≤40Ah
various
loads
e1493d
04.2002
1