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User’s Manual 27
The input circuit of the OP7200 was designed to use the differential mode in a unique way
to support measuring voltages in an equal range above and below ground. This method
also requires you to move the 0 Ω jumper (see Figure 11) on the header associated with the
A/D converter inputs (JP4, JP5, JP6, or JP7) from analog ground to the 2.048 V reference
voltage. The input is connected to the even-numbered channel, and the odd-numbered
channel is tied to analog ground. Table 4 provides the bipolar voltage ranges for this setup.
3.4.2 Analog Current Measurements
Table 4. Bipolar Voltages
Min. Voltage
(V)
Max. Voltage
(V)
Amplifier
Gain
mV per Tick
-20.0 +20.0 1 10
-10.0 +10.0 2 5
-5.0 +5.0 4 2.5
-4.0 +4.0 5 2.0
-2.5 +2.5 8 1.25
-2.0 +2.0 10 1.00
-1.25 +1.25 16 0.625
-1.0 +1.0 20 0.500
The A/D converter inputs can also be used with 4–20 mA
current sources by measuring the resulting analog volt-
age drop across a 100 Ω 1% precision resistor placed
between the analog input and analog ground as shown in
Figure 13.
The single-ended scale of 0–2.56 V with a gain of 8 is
used to get an A/D current conversion of 12.5 µA/tick.
Figure 13. Resistor for 4–20 mA
Current Sources
100 W
1%
AIN0AIN7
AGND
- User’s Manual 1
- OP7200 User’s Manual 2
- TABLE OF CONTENTS 3
- Chapter 4. Software 47 4
- Appendix B. Power Supply 139 5
- Appendix D. RabbitNet 151 5
- Index 161 5
- Schematics 165 5
- 1. INTRODUCTION 7
- Table 1. OP7200 Models 8
- Figure 1. OP7200 Tool Kit 9
- A compat 10
- User’s Manual 5 11
- 1.4 CE Compliance 12
- User’s Manual 7 13
- 8 eDisplay (OP7200) 14
- 2. GETTING STARTED 15
- 10 eDisplay (OP7200) 16
- User’s Manual 11 17
- PC COM port 18
- 2.4 Installing Dynamic C 19
- 2.5 Starting Dynamic C 19
- 2.6 PONG.C 20
- 2.7 Where Do I Go From Here? 20
- 2.8 Remove Battery Tab 21
- SETRTCKB.C 21
- 16 eDisplay (OP7200) 22
- 3. SUBSYSTEMS 23
- 3.1 OP7200 Pinouts 24
- 3.2 Indicators 25
- 3.3 Digital I/O 26
- Digital Input Voltage 27
- SINKING OUTPUTS 28
- SOURCING OUTPUTS 28
- CAUTION: Disconnect power 29
- User’s Manual 25 31
- Table 4. Bipolar Voltages 33
- 3.4.3.1 Modes 34
- User’s Manual 29 35
- 30 eDisplay (OP7200) 36
- 32 eDisplay (OP7200) 38
- 3.5 Serial Communication 39
- 34 eDisplay (OP7200) 40
- 36 eDisplay (OP7200) 42
- ETHERNET 43
- DIAG connector on 44
- 3.6 Memory 45
- PRE-2006 OP7200 46
- CURRENT OP7200 46
- 3.8 Keypad 47
- 3.9 OP7200 CPLD 48
- User’s Manual 43 49
- 3.10 Programming Cable 50
- 3.11 Other Hardware 51
- 46 eDisplay (OP7200) 52
- 4. SOFTWARE 53
- 48 eDisplay (OP7200) 54
- 4.1.1.2 Upgrades 55
- 50 eDisplay (OP7200) 56
- User’s Manual 51 57
- 4.3 Sample Programs 58
- 54 eDisplay (OP7200) 60
- User’s Manual 55 61
- 56 eDisplay (OP7200) 62
- 4.4 OP7200 Libraries 63
- 4.5 OP7200 Function APIs 64
- 4.5.2 Digital I/O 65
- OUT0–OUT7) 65
- 60 eDisplay (OP7200) 66
- 4.5.3 LEDs 68
- User’s Manual 67 73
- 70 eDisplay (OP7200) 76
- 0 if successful 78
- User’s Manual 77 83
- User’s Manual 95 101
- PARAMETER 101
- SEE ALSO 101
- 4.5.7 Keypad Functions 102
- 1 when completed 106
- RETURN VALUE 108
- 102 eDisplay (OP7200) 108
- PARAMETERS 108
- TsScanState function 116
- 4.7 RabbitNet Port 117
- 112 eDisplay (OP7200) 118
- 5. USING THE TCP/IP FEATURES 119
- <Ctrl-Y> 120
- 5.2 TCP/IP Sample Programs 121
- IP Address : 10.10.6.101 122
- Netmask : 255.255.255.0 122
- Default gateway : 10.10.6.1 122
- Start > Run 123
- 118 eDisplay (OP7200) 124
- 5.3 Where Do I Go From Here? 125
- 120 eDisplay (OP7200) 126
- CARE GUIDELINES 127
- 6.2 Installation Guidelines 128
- 6.3 Mounting Instructions 129
- OP7200 Bezel/Gasket 130
- 6.4 Care Guidelines 131
- 126 eDisplay (OP7200) 132
- APPENDIX A. SPECIFICATIONS 133
- 128 eDisplay (OP7200) 134
- User’s Manual 129 135
- A.1.1 Physical Mounting 136
- A.2 Conformal Coating 137
- A.3 Jumper Configurations 138
- User’s Manual 133 139
- 134 eDisplay (OP7200) 140
- Backup Battery 141
- A.5 I/O Address Assignments 143
- 138 eDisplay (OP7200) 144
- APPENDIX B. POWER SUPPLY 145
- 140 eDisplay (OP7200) 146
- /RESET output signal 147
- External 148
- Figure B-4. VRAM Switch 150
- B.3 Chip Select Circuit 151
- 146 eDisplay (OP7200) 152
- APPENDIX C 153
- DIGIN.C Sample Program 154
- DIGOUT.C Sample Program 155
- Jumpers: 156
- H1: None 156
- H2: As shown 156
- APPENDIX D. RABBITNET 157
- 152 eDisplay (OP7200) 158
- D.2 Physical Implementation 159
- D.3 Function Calls 160
- D.3.1 Status Byte 166
- User’s Manual 161 167
- 162 eDisplay (OP7200) 168
- User’s Manual 163 169
- 164 eDisplay (OP7200) 170
- SCHEMATICS 171
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