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1794ASB Series B
Allen-Bradley 1794ASB Series B User Manual
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User
Manual
Remote I/O
Adapter Module
(Cat.
No. 1794ASB Series B)
AllenBradley
2
Table of Contents
Table of Contents
5
Specifications
8
Using this Manual
8
Preface Objectives
8
Audience
8
Vocabulary
8
What this Manual Contains
8
Conventions
9
For Additional Information
9
Summary
9
Overview of FLEX I/O and Your Remote I/O Adapter Module
10
Chapter Objectives
10
The FLEX I/O System
10
How FLEX I/O Modules Communicate with Programmable Controllers
11
Hardware Components
12
Diagnostic Indicators
12
Reset Pushbutton
13
Remote I/O Wiring
13
Power Wiring
13
Address Switch Assemblies
13
Chapter Summary
13
Installing Your Remote I/O Adapter Module
14
Chapter Objectives
14
European Union Directive Compliance
14
EMC Directive
14
Low Voltage Directive
14
Power Requirements
15
Mounting the Remote I/O Adapter
15
Mounting on the DIN Rail
15
Mounting on a Wall or Panel
16
Wiring
18
Setting the Switches
19
Starting I/O Group
19
I/O Rack Number
19
Hold Inputs
19
Last Chassis
19
Reply Delay
19
Communication Rate
20
Processor Restart Lockout
20
Hold Last State
20
Communicating with FLEX I/O Modules
24
Chapter Objectives
24
Hardware Addressing
24
Determining Rack Size
25
Mapping Data into the Image Tables
27
Discrete I/O Modules
27
16 Point Discrete Input Module Image Table Mapping - 1794 IB16
28
Input Delay Times for the 1794 IB16 Input Module
28
Point Discrete Output Module Image Table Mapping - 1794 OB16
29
Memory Map of 16 Point Discrete Output Module Image Table - 1794 OB16
29
Point Discrete Input Module Image Table Mapping - 1794 IB8S
29
Memory Map of 8 Point Discrete Input Module Image Table (with Status) - 1794 IB8S
29
Input Delay Times for the 1794 IB8S Input Module
30
Point Discrete Input/Output Module Image Table Mapping - 1794 IB10XOB6
30
Memory Map of 16 Point Discrete Input/Output Module Image Table - 1794 IB10XOB6
30
Point Discrete Input Module Image Table Mapping - 1794 IA8
31
Memory Map of 8 Point Discrete Input Module Image Table - 1794 IA8
31
Input Delay Times for the 1794 IA8 Input Module
31
Point Discrete Output Module Image Table Mapping - 1794 OA8
32
Memory Map of 8 Point Discrete Output Module Image
32
Point Discrete Relay Output Module Image Table Mapping - 1794 OW8
32
Analog I/O Modules
33
Input Analog Module (Cat. No. 1794 IE8 Series B)
34
Analog Input Module (1794 IE8/B) Read
34
Analog Input Module (1794 IE8/B) Write Configuration Block
34
Range Selection Bits for the 1794 IE8/B Analog Input Module
35
Output Analog Module (Cat. No. 1794 OE4 Series B)
35
Analog Output Module (1794 OE4) Read
35
Analog Output Module (1794 OE4/B) Write Configuration Block
36
Range Selection Bits for the 1794 OE4/B Analog Output Module (Word 5)
36
Input/2 Output Analog Combo Module (Cat. No. 1794 IE4XOE2 Series B)
37
Analog Combo Module (1794 IE4XOE2/B) Read
37
Analog Combo Module (1794 IE4XOE2/B) Write Configuration Block
37
Range Selection Bits for the 1794 IE4XOE2/B Analog Combo Module
38
RTD Input Module (1794 IR8) Image Table Mapping
39
RTD Analog Input Module (1794 IR8) Read Words
39
RTD Analog Input Module (1794 IR8) Write Words
40
Thermocouple/MV Input Module (1794 IT8) Image Table Mapping
40
Thermocouple/MV Input Module (1794 IT8) Read
40
Thermocouple/MV Input Module (1794 IT8) Write
41
Operating Modes
41
Chapter Summary
41
Troubleshooting
42
Chapter Objectives
42
Fault Conditions
42
Troubleshooting with the Indicator Lights
42
Remote I/O System Troubleshooting Guide
43
Table 4.A Remote I/O System Troubleshooting Guide
43
Chapter Summary
44
Specifications
45
Support Services
51
Technical Support
51
Engineering and Field Services
51
Technical Training
51
Repair and Exchange Services
51
4
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Allen-Bradley 1794ASB Series B Specifications
General
Brand
Allen-Bradley
Model
1794ASB Series B
Category
Adapter
Language
English
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