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1
THERMISTORS MEASUREMENTS
A
THERMISTOR CHANNEL 1
PLACE SW1 IN LOWER POSITION
TO MEASURE THERMISTOR VALUE
SW1B
9
8
BW_SX_TEMP/THERM1
7
12
11
BW_SX_TEMP_RTN/THERM1
10
THERMISTOR_1B
4PDT
-15VDC
VR1
R249
3
1
649K
500K
0.1%
B
THERMISTOR CHANNEL 2
PLACE SW2 IN LOWER POSITION
TO MEASURE THERMISTOR VALUE
SW2B
9
8
BW_RX_TEMP/THERM2
7
12
11
BW_RX_TEMP_RTN/THERM2
10
THERMISTOR_2B
4PDT
-15VDC
C
VR3
R257
3
1
649K
500K
0.1%
BYPASS CAPACITORS
+15VDC
U51
U52
C269
C270
D
0.1uF
0.1uF
50V
50V
C271
C272
0.1uF
0.1uF
50V
50V
AGND
-15VDC
1
2
6 SW1A
4
THERMISTOR_1A
3
1
R248
4PDT
A
B
W11
75K
0.1%
AGND
C265
1uF 50V
+15VDC
U51A
VCC
2
R253
1
3
LM358A
100
1%
VSS
AGND
AGND
-15VDC
6 SW2A
4
THERMISTOR_2A
3
1
R255
4PDT
A
B
W12
75K
0.1%
AGND
C267
1uF 50V
+15VDC
U52A
VCC
2
R262
1
3
LM358A
100
1%
VSS
AGND
AGND
-15VDC
2
3
4
PLACE SW3 IN LOWER POSITION
TO MEASURE THERMISTOR VALUE
5
BW_SX_TEMP_IN
UPR_HEAD_TEMP/THERM3
2
BW_SX_TEMP_RTN
UPR_HEAD_TEMP_RTN/THERM3
-15VDC
PLACE SW4 IN LOWER POSITION
TO MEASURE THERMISTOR VALUE
5
BW_RX_TEMP_IN
LWR_HEAD_TEMP/THERM4
2
BW_RX_TEMP_RTN
LWR_HEAD_TEMP_RTN/THERM4
-15VDC
3
4
5
THERMISTOR CHANNEL 3
SW3B
9
8
7
THERMISTOR_3A
12
11
R247
A
B
10
THERMISTOR_3B
4PDT
W13
75K
0.1%
C266
1uF 50V
VR2
U51B
6
R250
3
1
7
5
LM358A
649K
100
500K
0.1%
AGND
AGND
THERMISTOR CHANNEL 4
SW4B
9
8
7
THERMISTOR_4A
12
11
R256
A
B
10
THERMISTOR_4B
4PDT
W14
75K
0.1%
C268
1uF 50V
VR4
U52B
6
R258
3
1
7
5
649K
LM358A
100
500K
0.1%
AGND
AGND
5
6
6 SW3A
5
UPR_HEAD_TEMP_IN
4
3
2
UPR_HEAD_TEMP_RTN
1
4PDT
AGND
R254
1%
6 SW4A
5
LWR_HEAD_TEMP_IN
4
3
2
LWR_HEAD_TEMP_RTN
1
4PDT
AGND
R261
1%
SIZE
DRAWING NUMBER
REV
D
65 8150 0126 AS 10
01
SCALE
DESIGNER
SHEET
N/A
ANDRZEJ NAWROCKI
10
14
OF
ALTIUM DRAWING
DO NOT REVISE MANUALLY
6
A
B
C
D
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