2 . T e c h n i c a l System Description
1 / 2 0 1 0
2 - 46
BA-TE-DE08C M.KAY
SW9xx_sm_Chapter 2_1-2010.doc/pdf <100329> yymmdd
B. Braun Avitum AG
Dialog
+
SW 9.xx
2.22.5
Description SMPS-MC
The switch mode power supply microcontroller SMPS-MC is used in
machines with software
≥
9.xx.
Basic Components SMPS-MC
•
Mains input, filter (EMC)
•
Bridge rectifier
•
PFC converter
•
DC/DC converter
•
Transformer
•
24 VL output (protected via F 600)
•
24 VGB output (switched via K3, protected via F601)
•
24 VGD output (switched via K4, protected via F602)
•
DC/DC converter 24 V/+5 V (protected via F301/F302/F303/F304)
•
DC/DC converter 24 V/+12 V (protected via F401/F402/F403)
•
DC/DC converter 24 V/-12 V (electronically protected and via soldered fuse
F500)
•
Heater power circuit triac V29/V30
•
Microcontroller (D900) for monitoring and heater control
•
Signal interface P2
•
Power connectors to the system components P4 ... P12
•
Battery screw terminal to 24 V P3
SMPS-MC
The SMPS-MC (
S
witch
M
ode
P
ower
S
upply
M
icro
C
ontroller) is assembled in
the rear door. The primary triggered switch mode power supply generates the
following voltages on the secondary side: +5 V (5 V = 5.2 V);
±
12 V and 24 V
(24 V = 21.5 ... 29.07 V). The primary side has a wide range input for
120/230/240 V
±
10 %.
The SMPS-MC is not backwards compatible to the switch mode power supply
SMPS.
Battery Option
The battery option is available in the machine ex works and can also be
retrofitted. The blood side functions in therapy can be maintained with a
battery supply (option) in case of a power failure. The charging circuit is
integrated in the SMPS-MC and includes a deep discharge protection.
Mains Voltage
120/230/240 V
±
10 %, 50/60 Hz
Mains Switch ON/OFF
If the is switched off via the Automatic Switch-Off function in therapy,
the machine is in standby mode, e.g. the can be switched on and off
via the disinfection program.
The is only disconnected from mains if the mains plug is pulled out of
the mains receptacle.
Switch-off in Therapy
The buzzer is activated three times if the is switched off in therapy.
Mains Failure
The (with SMPS-MC) can be switched off and on again in battery
operation approx. 16 min after mains failure.
Voltages
+5 VC
Controller power supply
+5 VD:
Digital
+5 VG:
buffered (generated from +12 VH)
+12 VH:
Aux. voltage
±
12 VAN:
Analog
±
12 VD:
Digital
+24 VGB:
Switched blood side
+24 VGD:
Switched dialysate side
+24 VL:
Power (uncontrolled)
GNDAN:
GND analog
GNDD:
GND digital
GNDH:
GND aux. voltage
GNDL:
GND power
