Rockwell-automation 1771-IR Series D RTD Input Module User Manual Manual de usuario Pagina 51
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Appendix A
Publication 1771Ć6.5.129 - March 2000
Description Value
Number of Inputs 6 RTD input channels
Module Location 1771 I/O Chassis
Sensor Type 100 ohm platinum (alpha = 0.00385) or 10 ohm copper
(alpha = 0.00386)
Other types may be used with report in ohms only
Units of measure Temperature in
o
C
Temperature in
o
F
RTD resistance in ohms (10milliohms or 30milliohms
resolution)
Temperature Range Platinum: -200 to +870
o
C (-328 to 1598
o
F)
Copper: -200 to +260
o
C (-328 to +500
o
F)
Resistance Range 1.00 to 600.00 ohms
Resolution Platinum: 0.1
o
C (0.1
o
F)
Copper: 0.3
o
C (0.5
o
F)
Sensor Excitation 1mA constant current source supplied by module
Common Mode Rejection 120db @ 60Hz up to 1000V peak
Common Mode Impedance Greater than 10 megohms
Normal Mode Rejection 60db @ 60Hz
Input Overvoltage Protection 120V rms continuous
Open RTD Response Time Open excitation (terminal A) to overrange: <0.5sec
Open common (terminal C) to underrange: <0.5sec
Open sense (terminal B): drift high
Scan Time 50ms for 6 channels
Isolation Voltage This isolation meets or exceeds the requirements of UL
Standard 508, and CSA Standard C22.2 No. 142.
Backplane Current 950mA at 5V
Power Dissipation 4.75W maximum
Thermal Dissipation 16.2 BTU/hr
Environmental Conditions
Operating Temperature:
Rate of Change:
Storage Temperature:
Relative Humidity: Operating
Storage
0to60
o
C (32 to 140
o
F)
Ambient changes greater than 1.0
o
C/minute may temporarily
degrade performance during periods of change.
-40 to 85
o
C (-40 to 185
o
F)
5 to 95% noncondensing
5 to 95% noncondensing
Temperature Coefficient +50ppm/
o
C of full scale range
Specifications continued on next page
- 1
- 1
- Important User Information 2
- 3
- Related Products 4
- Product Compatibility 4
- Related Publications 5
- Using This ManualP–4 6
- Table of Contents 7
- Configuring Your RTD 8
- Module Status and Input 8
- Calibrating Your Module 8
- Table of Contents toc-iii 9
- Table of Contents 10
- Overview of the RTD Input 11
- How Analog Modules 12
- Communicate with 12
- Programmable Controllers 12
- Accuracy 13
- Chapter Summary 13
- Installing the RTD Input 15
- Calculate Power 16
- Requirements 16
- Determine Module 16
- Placement in the I/O 16
- Key the Backplane 17
- Connector 17
- Install the Module and 17
- Field Wiring Arm 17
- Connect Wiring to the 18
- Ground the Chassis and Module 20
- Interpret Status Indicators 21
- 23
- PLC-2 Program Example 24
- Program Action 25
- PLC-3 Program Example 26
- PLC-5 Program Example 27
- Module Scan Time 28
- Configuring Your RTD Module 29
- Data Format 30
- RTD Type 30
- Units of Measure 30
- Real Time Sampling 31
- Configuring Block for a 32
- Block Transfer Write 32
- Bit/Word Descriptions 32
- calibration complete 34
- Module Status and Input Data 35
- 39
- Performing 40
- Auto-calibration 40
- Gain Calibration 42
- Performing Manual 43
- Calibration 43
- Refer to the table below 44
- Calibration 45
- 47
- (1771-IR/D) 48
- 7–4 Troubleshooting 50
- 51
- 53
- PLC-3 Family Processors 54
- PLC-5 Family Processors 55
- Programming ExamplesB–4 56
- 57
- Signed-magnitude Binary 58
- Two's Complement Binary 59
- Data Table FormatsC–4 60
- Block Transfer (Mini-PLC-2 61
- Setting the Block Length 63
- (Multiple GET Instructions 63
- 2 and 4-Wire RTD Sensors 65
- 2 and 4–Wire RTD SensorsE–2 66
- Connecting 4-Wire 67
- 2 and 4–Wire RTD SensorsE–4 68
- Differences Between Series A 69
- RTD Modules and Series B. C 69
- CSA Hazardous Location 73
- Approval 73
- AllenĆBradley 77
- Publication Problem Report 77
- BUSINESS REPLY MAIL 78
- Worldwide representation 79
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