Allen-Bradley 1794-IE8H Especificaciones Pagina 111
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103 Publication 1794-SG002D-EN-P - May 2012
Section
2.4
Select a FLEX Ex I/O Terminal Base Unit
Step 3 – Select:
the appropriate terminal base unit for your module and system
Each FLEX Ex I/O module requires a FLEX Ex I/O terminal base unit that
snaps onto the DIN rail to the right of the I/O adapter. The terminal bases
provide terminal connection points for the I/O wiring and plug together to form
the backplane. They are available with screw, clamp, or spring terminations.
The following table is a comparison of general specifications for each
FLEX Ex I/O terminal base unit. For compatibility with FLEX Ex I/O modules,
see TableDigital I/O Module Summary on page87 and TableAnalog I/O
Module Summary on page91.
Terminal Base Wiring
Diagrams
1797-TB3 and 1797-TB3S
Wiring when total module current draw is less than 8.5 W
Daisy-chaining Using Adapter Power Supply
Use this method when the total module power draw is less that 8.5 W. Otherwise,
power is connected to individual modules.
+V, - V
- Bulletin 1794 and 1797 1
- 1794-SG002D-EN-P 1
- Important User Information 2
- Table of Contents 3
- Table of Contents v 5
- Section 3.1 6
- Section 4.1 6
- Summary of Changes 7
- New and Updated 7
- Information 7
- 1794 FLEX I/O Overview 9
- General FLEX I/O and 11
- FLEX I/O XT Specifications 11
- 1794 FLEX I/O XT Overview 11
- Specify a FLEX I/O or 13
- FLEX I/O XT System 13
- Step 1 – Select: 15
- CIP Network Infrastructure 15
- Select a Network 16
- Device-Level Ring Topology 17
- ControlNet Network 18
- DeviceNet Network 19
- DNet In DNet Out 20
- Other Network Communication 21
- Other Networks – PROFIBUS DP 22
- Select FLEX I/O Modules 23
- Digital I/O Module Summary 24
- Digital Modules 26
- Derating Curve 27
- Modules Specifications 28
- 1794-IM8 Derating Curve 29
- Digital AC Output Comparison 29
- 1794-OM8 Derating Curve 31
- Digital DC Input Comparison 31
- 1794-IB32 Derating Curve 33
- 1794-IC16 Derating Curve 33
- Digital DC Output Comparison 34
- 1794-OB16P Derating Curve 36
- Surge Current — A 37
- 1794-IB16D Derating Curves 39
- FLEX I/O Analog 43
- Thermocouple and RTD 43
- Analog I/O Module Summary 44
- Analog 12 Input Module 47
- IMPORTANT 48
- Isolated Analog Input Modules 48
- 1794-IR8 RTD Input Module 51
- 1794-IR8 Derating Curve 52
- Thermocouple/mV Input Module 54
- = Safe operating area 55
- Combination Modules 57
- Analog Combination Module 58
- Analog Output Comparison 59
- Analog 4 Input Modules 60
- Analog 12 Output Module 62
- FLEX I/O Counter Modules 66
- 24V DC Input Frequency Module 68
- 2 Input Pulse Counter Module 71
- 4 Input Pulse Counter Module 72
- 1794-PS3 AC/DC 77
- 1794-PS13 AC/DC 77
- About the FLEX Ex I/O Systems 79
- FLEX Ex Typical 81
- Configurations 81
- Entity-Based Architecture 83
- Hazardous Area 83
- Designation 83
- Specify a FLEX Ex System 86
- 1797-BCNR Coax Barrier Module 90
- Select FLEX Ex I/O Modules 95
- (1) 1 ms default selectable 97
- (2) 1 ms default selectable 97
- Analog Modules 99
- Module Specifications 100
- Input Module 102
- HART Interface Modules 103
- FLEX Ex I/O Analog 104
- Output Modules 104
- Counter I/O Module 106
- Step 3 – Select: 111
- Terminal Base Wiring 111
- Diagrams 111
- Step 4 – Select: 113
- E Type Power Supply 114
- N Type Power Supply 114
- Understanding System Planning 114
- Assigning Power Supplies 116
- Hardened conduit 117
- Type of Power Input 118
- Mount the FLEX System 121
- Select Optional Accessories 123
- 1492-EA35 DIN Rail Locks 124
- 1794-LBL FLEX I/O Label Kit 124
- 1794-CJC2 124
- Step 5 – Select: 125
- ControlNet Ex Taps 126
- 1786-RG6 Coax Trunk Cable 127
- Related Documentation 129
- FLEX Ex I/O 133
- For More Information 133
- Rockwell Automation Support 136
- Documentation Feedback 136
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