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User’s Manual 139
APPENDIX B. POWER SUPPLY
Appendix B describes the power circuitry provided on the
OP7200.
B.1 Power Supplies
Power is supplied to the OP7200 via pins 1 and 2 of screw-terminal header J3. The OP7200
is protected against reverse polarity by a full-wave bridge rectifier as shown in Figure B-1.
The full-wave bridge rectifier also allows the OP7200 to be powered from 24 V AC.
Figure B-1. OP7200 Power Supply
The input voltage range is from 9 V to 40 V DC. A switching power regulator is used to
provide a Vcc of +5 V for the OP7200 logic circuits. Vcc is can be made accessible to the
user by installing a 0 Ω resistor at R71. Vcc will then be available instead of digital input
IN15 on pin 4 of screw-terminal header J10.
The OP7200 can alternatively be powered by 24 V AC. In this case the full-wave bridge
rectifier produces approximately 30 V DC at the input of the switching regulator.
Although a significant drop will be measured at the input to the switching regulator, the
voltage will never drop below +9 V DC. As long as the minimum input level is maintained
at the input to the regulator, Vcc will be held at +5 V DC.
There is provision on the printed-circuit board for a transorb to be installed at TVS1 in
parallel with C49 to provide suppression for positive noise pulses above 51 V. This part is
only needed when the OP7200 will be used in industrial environments where a clean
source of power cannot be guaranteed, and is not part of the normal factory build.
POWER IN
J3
47 µF
330 µF
U8
Vcc
L9
C39
C49
330 µH
D24
1N5819
14
15
8
1
12
7
17
18
10
2
3
4
1
SWITCHING POWER REGULATOR
VIN
LM2575
+PWR
PWR
TVS1
- 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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