Torque Coil Board Testing
1. Introduction
1.1 Background
The Torque Coil Board is a CEE board that plugs into the CEE backplane. Its
main function is to provide the necessary current for the X, Y, and Z coil.
1.2 Scope/Objectives
The purpose of this document is to outline the procedure for functional testing
of the Torque Coil Board for HokieSat. The functional test described in this
document is intended to verify that the electronics on the board are
operational.
1.3 Applicable Documents
None
1.4 Equipments
a. Multimeter with input impedance higher than 20kΩ/volt.
b. Power supply capable to output 3.3V/1.5A
c. Labview system (look at LTC1448 datasheet for programming the DAC)
1.5 Physical Description
The Torque coil has approximate dimensions of XXX. The boar has 1
connector (J1), which is the backplane interface
1
2. Board Power Bus test
2.1 Setup
a. Power the following pins on the backplane connector


41,81,122
1-9
+3.3V
Ground bus negative
b. Apply +3.3V to pin 48 (PWR_SLOT) of the backplane, measures the
voltage at pins 5 and 6 of U2B or pins 7 and 8 of U2A, the reading should
be around 3.3V, record this value.
c. Apply 0V (ground) to pin 48 (PWR_SLOT) of the backplane, measures the
voltage at pins 5 and 6 of U2B or pins 7 and 8 of U2A, the reading should
be around 0V, record this value
3 Maximum current sensing
3.1 Direction X-coil
a. Follows steps 2.1a and 2.1b
b. Measures the voltage at pin 6 and 7 of U12, it should read approximately
+3.3V
c. Connects a 10 ohms/1W resistor between pin 6 and 7 of U12 and ground,
the voltage at pin 6 and 7 of U12 should be approximately 0V.
3.2 Direction Y-coil
a. Follows steps 2.1a and 2.1b
b. Measures the voltage at pin 6 and 7 of U11, it should read approximately
+3.3V
c. Connects a 10ohms/1W resistor between pin 6 and 7 of U11 and ground,
the voltage at pin 6 and 7 of U12 should be approximately 0V.
3.1 Direction Z-coil
a. Follows steps 2.1a and 2.1b
b. Measures the voltage at pin 6 and 7 of U10, it should read approximately
+3.3V
c. Connects a 10ohms/1W resistor between pin 6 and 7 of U10 and ground,
the voltage at pin 6 and 7 of U10 should be approximately 0V.
2
4. Coil current direction test
4.1 Direction X-coil current
a.
b.
c.
d.
e.
f.
Follow steps 2.1a and 2.1b
Connect a voltmeter to measure the voltage between pin 5 and pin
1,2,3,4 of J4. Connect the positive lead to pin 5.
Applied +3.3V to the signal DIRECTION_X (pin 32) of the backplane
connector.
Register the voltage.
Applied 0V to the signal DIRECTION_X (pin 32) of the backplane
connector.
Register the voltage. This voltage should be the negative of the voltage
read in step d.
4.2 Direction Y-coil current
a. Follow steps 2.1a and 2.1b
b. Connect a voltmeter to measure the voltage between pin 5 and pin 1,2,3,4
of J3. Connect the positive lead to pin 5.
c. Applied +3.3V to the signal DIRECTION_Y (pin 33) of the backplane
connector.
d. Register the voltage.
e. Applied 0V to the signal DIRECTION_Y (pin 33) of the backplane
connector.
f. Register the voltage. This voltage should be the negative of the voltage
read in step d.
4.3 Direction Z-coil current
a. Follow steps 2.1a and 2.1b
b. Connect a voltmeter to measure the voltage between pin 5 and pin 1,2,3,4
of J2. Connect the positive lead to pin 5.
c. Applied +3.3V to the signal DIRECTION_Z (pin 27) of the backplane
connector.
d. Register the voltage.
e. Applied 0V to the signal DIRECTION_Y (pin 27) of the backplane
connector.
f. Register the voltage. This voltage should be the negative of the voltage
read in step d.
3
5. Coil current range determination
5.1 Direction X-coil current ranges
5.1.1 Setup
g. Follow steps 2.1a and 2.1b
h. Connect the signal DAC_CLK (pin 28), DAC_DIN (pin 29), and
DAC_CS1# (pin 30) of the backplane connector to the appropriate pins of
the signal break out box that interfaces with the Labview Data acquisition
card.
i. Connect a voltmeter to measure the voltage across R23.
5.1.2 Positive X-coil current
a. Applied +3.3V to the signal DIRECTION_X (pin 32) of the backplane
b. The current range for the coil is +/- 160mA. To determine the relationship
between the digital output (from Labview) and the coil current, use a table
similar to the one provides here to register the voltage across R23 for
each digital output (Hex or Decimal format).
Voltage
Digital
Signal
c. The voltage range across R23 should be 0 to 0.2V
d. Because the value of R23 is 1 ohm, the current through the coil is equal
the voltage reading.
5.1.3 Negative X-coil current
a. Applied 0V to the signal DIRECTION_X (pin 32) of the backplane
b. The current range for the coil is +/- 160mA. To determine the relationship
between the digital output (from Labview) and the coil current, use a table
similar to the one provides here to register the voltage across R23 for
each digital output (Hex or Decimal format).
Voltage
Digital
Signal
c. The voltage range across R23 should be 0 to 0.2V
d. Because the value of R23 is 1 ohm, the current through the coil is equal
the voltage reading.
4
5.2 Direction Y-coil current ranges
5.2.1 Setup
a. Follow steps 2.1a and 2.1b
b. Connect the signal DAC_CLK (pin 28), DAC_DIN (pin 29), and
DAC_CS1# (pin 30) of the backplane connector to the appropriate pins of
the signal break out box that interfaces with the Labview Data acquisition
card.
c. Connect a voltmeter to measure the voltage across R11.
5.2.2 Positive Y-coil current
a. Applied +3.3V to the signal DIRECTION_Y (pin 33) of the backplane
b. The current range for the coil is +/- 160mA. To determine the relationship
between the digital output (from Labview) and the coil current, use a table
similar to the one provides here to register the voltage across R11 for
each digital output (Hex or Decimal format).
Voltage
Digital
Signal
c. The voltage range across R23 should be 0 to 0.2V
d. Because the value of R11 is 1 ohm, the current through the coil is equal
the voltage reading.
5.2.3 Negative Y-coil current
a. Applied 0V to the signal DIRECTION_Y (pin 33) of the backplane
b. The current range for the coil is +/- 160mA. To determine the relationship
between the digital output (from Labview) and the coil current, use a table
similar to the one provides here to register the voltage across R11 for
each digital output (Hex or Decimal format).
Voltage
Digital
Signal
c. The voltage range across R23 should be 0 to 0.2V
d. Because the value of R23 is 1 ohm, the current through the coil is equal
the voltage reading.
5
5.3 Direction Z-coil current ranges
5.3.1 Setup
a. Follow steps 2.1a and 2.1b
b. Connect the signal DAC_CLK (pin 28), DAC_DIN (pin 29), and
DAC_CS2# (pin 31) of the backplane connector to the appropriate pins of
the signal break out box that interfaces with the Labview Data acquisition
card.
c. Connect a voltmeter to measure the voltage across R10.
5.3.2 Positive X-coil current
a. Applied +3.3V to the signal DIRECTION_Z (pin 27) of the backplane
b. The current range for the coil is +/- 160mA. To determine the relationship
between the digital output (from Labview) and the coil current, use a table
similar to the one provides here to register the voltage across R10 for
each digital output (Hex or Decimal format).
Voltage
Digital
Signal
c. The voltage range across R10 should be 0 to 0.2V
d. Because the value of R10 is 1 ohm, the current through the coil is equal
the voltage reading.
5.3.3 Negative Z-coil current
a. Applied 0V to the signal DIRECTION_Z (pin 27) of the backplane
b. The current range for the coil is +/- 160mA. To determine the relationship
between the digital output (from Labview) and the coil current, use a table
similar to the one provides here to register the voltage across R10 for
each digital output (Hex or Decimal format).
Voltage
Digital
Signal
c. The voltage range across R10 should be 0 to 0.2V
d. Because the value of R10 is 1 ohm, the current through the coil is equal
the voltage reading.
6
1
2
3
4
5
6
BACKPLANE INTERFACE
J1
D
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
X-Coil
TorqueSheetX-Coil.sch
Y-Coil
TorqueSheetY-Coil.sch
Z-Coil
TorqueSheetZ-Coil.sch
C
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
DIRECTION_Z
DAC_CLK
DAC_DIN
DAC_CS1#
DAC_CS2#
DIRECTION_X
DIRECTION_Y
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
PWR_SLOT7
+3.3V, BP
+3.3V, BP
D
C
+3.3V, BP
WGA122PR9SY
+3.3V, BP
1
+3.3V, BP
Power Supplied by the BackPlane
C11
0.1uF
+ C9
10uF
R3
4.99k
R1
4.99k
B
3
1
in4
out4
in3
out3
in2
out2
in1
out1
8
8
6
6
4
4
2
2
in6
out6
in5
out5
in4
out4
in3
out3
in2
out2
in1
out1
1
1
3
BoardPowerSwitch_A
11
BoardPowerSwitch_B
4
U2B
IRF7314
BoardPowerSwitch_B
2
U2A
IRF7314
D1
B130LB
9
5
3
1
Board Power Bus
74C906
+3.3V
7
7
74HC04
13
2
10
1
14
10
U9
Vcc
out5
12
GND
5
in5
12
7, 8
9
out6
5, 6
11
U8
in6
GND
13
PWR_SLOT7
Vcc
14
1
2
B
+ C8
10uF
2
C10
0.1uF
2
2
1
+3.3V, BP
A
A
Title
Backplane Connector Interface --Slot 7 Only!
Size
Per ION-F definition, unused IO are grounded on PCB to prevent floating m etal.
Updated: After ION-F Changes of 5/31.
Updated: Added additional unused MOSFET of 7314 for redundancy 1/4/02.
1
2
Number
Revision
B
Date:
File:
3
4
2-Jan-2003
Sheet of
C:\Documents and Settings\yuen on\My Documents\P
Drawn By: rotel\Hokiesat\TorqueThis\TorqueThis.Ddb
5
6
7
1
2
3
4
5
6
DIRECTION-X COIL
+3.3V
1
CS'/LD GND
4
1
U1
0.1uF
VoutA
R5
4.99k
1
1
1
1
R4
4.99k
R2
4.99k
R6
4.99k
2
2
5
SET
R16
4.99k
C24
0.1uF
3
ON'/OFF
GND
6
6
OUT
FLT'
4
2
1
+ C12
10uF
D
R17
4.99k
2
IN
8
2
C15
0.1uF
7
DIR_X_POS
M AX893L
R15
6.65k
5
AMP LI TUDE_X
REF
8
+3.3V
D4
B130LB
2
Vcc
1
VoutB
2
OUT
2
Din
3
DAC_CS1#
+3.3V
CLK
2
DAC_DIN
+ C21
10uF
2
1
DAC_CLK
C23
0.1uF
+3.3V
IN
7
2
U5
1
1
U12
AM PLITUDE_Y
1
+3.3V
D
DIR_X_NEG
DIR_Y_POS
+3.3V
DIR_Y_NEG
C6
0.1uF
+ C3
10uF
DIR_Z_POS
DIR_Z_NEG
V+
U6A
-
R14
1
DRIVE_X
6
U15A
ZDT605
DRIVE_X 8
U15B
ZDT605
C1
+
2
C2
3
C
1
2
4
3
4
2
2
1
LTC1448
100
OPA4340
C
7
5
11
V-
VSens e_X
+3.3V
1
+3.3V
2
3
12
2
14
14
U7
C26
0.1uF
R25
2
1.0k
1
out4
in3
out3
in2
out2
in1
out1
8
6
6
DIRECTION_Z
4
DIRECTION_Y
2
DIRECTION_X
4
2
Vcc
8
out6
in5
out5
in4
out4
in3
out3
in2
out2
in1
out1
DIR_X_NEG
11
DIR_Y_POS
4
5, 6 U21B
IRF7313
D19
B130LB
U21A
D18
B130LB
7, 8
2
DIR_X_POS
IRF7313
3
2
7
7
A24692-ND
DIR_Z_POS
3
2
1
DIR_Z_NEG
5
1
4
DIR_Y_NEG
9
74C906
74HC04
B
3
1
out5
in4
in6
5
1
3
in5
10
DIR_X_NEG
2
5
10
IRF7314
J4
13
1
9
out6
12
2
DIRECTION_Z
in6
12
GND
DIRECTION_Y
11
GND
DIRECTION_X
Vcc
U3
13
D12
B130LB
5, 6
D13
B130LB 1
7, 8
B
U20B
4
1
U20A
IRF7314
2
2
+ C2
10uF
1
1
1
+3.3V
C7
0.1uF
2
C13
0.1uF
+ C20
10uF
1
R23
1 Ohm
A
A
Title
Size
Number
Revis ion
B
Date:
File:
1
2
3
4
5
6-J an-2003
Sheet of
C:\Documents and Settings \yuen on\M y Documents
Drawn
\Protel\Hokies
By:
at\TorqueThis \TorqueThis .Ddb
6
8
1
2
3
4
5
6
DIRECTION-Y COIL
+3.3V
1
+3.3V
U11
1
C18
0.1uF
+ C17
10uF
2
2
8
IN
OUT
IN
OUT
FLT'
4
ON'/OFF
GND
SET
D3
B130LB
7
D
2
1
D
6
C19
0.1uF
3
5
M AX893L
R12
DRIVE_Y 6
U14A
ZDT605
DRIVE_Y 8
100
-
5
OPA4340
C
U14B
ZDT605
C1
7
7
+
6
C2
5
4
3
U6B
AM PLITUDE_Y
C
1
2
R8
6.65k
Vs ens eY
3
U19B
4
1
C25
2
12
0.1uF
R24
B
D10
B130LB
2
5, 6
7, 8
D11
B130LB 1
IRF7314
2
B
1
1
+3.3V
U19A
IRF7314
2
1.0k
J3
5
DIR_Y_POS
3
4
2
DIR_Y_NEG
1
1
1
A24692-ND
U18A
D16
B130LB
7, 8
2
2
D17
B130LB
2
5, 6 U18B
IRF7313
4
1
3
1
IRF7313
R11
1 Ohm
A
A
2
Title
Size
Number
Revis ion
B
Date:
File:
1
2
3
4
5
6-J an-2003
Sheet of
C:\Documents and Settings \yuen on\M y Documents
Drawn
\Protel\Hokies
By:
at\TorqueThis \TorqueThis .Ddb
6
9
1
2
3
4
5
6
DIRECTION-Z COIL
D
D
-
U6C
8
+3.3V
+3.3V
OPA4340
1
+ C22
10uF
2
8
2
C16
0.1uF
U4
3
Vcc
CS'/LD GND
REF
VoutA
1
5
SET
M AX893L
C5
0.1uF
7
3
ON'/OFF
GND
C14
0.1uF
+ C4
10uF
R7
6.65k
6
5
2
LTC1448
12
13
U6D
AMP LI TUDE_Z
1
4
C1
0.1uF
C
VoutB
Din
6
+
C
14
R9
DRIVE_Z
6
100
-
1
2
DAC_CS2#
CLK
FLT'
4
8
D2
B130LB
7
4
3
+3.3V
2
OUT
U13A
ZDT605
DRIVE_Z
C2
DAC_DIN
+3.3V
OUT
IN
2
DAC_CLK
1
IN
2
1
U10
8
U13B
ZDT605
C1
9
+
1
10
7
5
OPA4340
Vs ens eZ
3
2
12
0.1uF
R26
D8
B130LB
2
1.0k
B
IRF7314
2
C27
5, 6
D9
B130LB 1
7, 8
B
U17B
4
1
1
1
+3.3V
U17A
IRF7314
2
J2
5
DIR_Z_POS
3
4
2
DIR_Z_NEG
1
1
1
A24692-ND
4
U16A
D14
B130LB
7, 8
2
2
D15
B130LB
2
5, 6 U16B
IRF7313
1
3
1
IRF7313
2
R10
1 Ohm
A
A
Title
Size
Number
Revis ion
B
Date:
File:
1
2
3
4
5
6-J an-2003
Sheet of
C:\Documents and Settings \yuen on\M y Documents
Drawn
\Protel\Hokies
By:
at\TorqueThis \TorqueThis .Ddb
6
10