Sorvall RT/T6000D - Low Voltage Distribution

SORVALL®
Centrifuges
System
Descriptions:
Electrical
'^7h
Switch
CB1
^^
I
J--
^^
r"
Call For
Cooling
From
Temperature
Control
Circuit
>1
y^
P/J^
Compressor
Control Triac
P/J1C
———————————————^>
Compressor
& Fan
Assy
Transformer
T3
50
Hz
Models
Only
•)>
/
1
Power
Transformer
T1
^\
2
o^
^
Figure
6-5.
High
Voltage
Distribution
(shown in
de-energized
state)
6-8.
Low
Voltage
Distribution
(refer
to
figure
6-6)
The
low
voltage generation
begins
at
the
secondary
side
of
Power Transformer
T1.
Two
output
stages
ofTI
produce
9 Vac [RT/T6000D
and
RT/T6000B
SNs 9101800
&
above
centrifuges only]
and
24
Vac.
RT/T6000D
and RT/T6000B SNs
9101800
&
above
centrifuges only:
The
9
Vac
portion
passes
through
P/J9
pins
2
and
7
to
be
input
at
the full
wave bridge rectifier
assembly
(CR20).
The rectifier's
output
is
fed
directly into
a
+5 Vdc
voltage regulator
(U27)
whose
output
can
be
tested
at test
point
TP-15
with
respect
to
ground
test
point
TP-1.
Capacitors
C30
and
C31
are
provided
for
smoothing
and filtering
the
voltage
both
in
and
out
of
the
voltage regulator.
All
centrifuge models:
The
24
Vac
portion
from
the
secondary
side of
Power
Transformer
T1
passes
through P/J9
pins
3 and
lOto
be
input
at
the full
wave bridge rectifier
assembly.
The +24 Vdc
created
at
the
rectifier's
output
is
unregulated,
but
smoothed
by
smoothing
capacitor.
The
+24
Vdc
supply
is used
to
power
the
Run/Brake
Relay
(Kl)
and
the
Door
Solenoid
(LI).
The +24
Vdc
voltage
is
also
used
as a power
source
for
the
+12
Vdc
regulator.
The
regulator's
output
produces
the +12
Vdc
required
by
all
the TTL
devices
used
on
the
P.C.
Boards.
It
is filtered
and smoothed
by
capacitors.
LI
1
'-T——1
^pC30
)
680
pF
,24Vdc^
1
+
I
Smoothing
Capacitor
A340T.5
'J'
3
1
^»
•
-T———
C31
^p
0
0.1
pF
25 Vdc ^—————1
T
TPI6
?
»12Vdc
3
1
11
Megulator
1
i
B*
1————1
J
|*
I T
Smoothing
Capacitors
+2
Figure
6-6. Low
Voltage
Distribution
6-9