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EM122-RTU-2P
Weidmüller EM122-RTU-2P User Manual
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EM122-RTU-
2P
Manual
2
Table of Contents
Table of Contents
3
General
5
Copyright
5
Trademarks
5
Disclaimer
5
Meaning of the Symbols
5
Application Notes
6
About These Operating Instructions
7
Incoming Goods Inspection
8
Scope of Delivery
8
Product Description
9
Intended Use
9
Specifications
10
Operating Concept
12
EM Configuration Tools
13
Connection Options
13
Assembly
14
Installation Location
14
Power Supply
14
Voltage and Current Measurement Inputs
15
Direction of the Current
16
RS485 Interface
16
Terminating Resistors
17
Shielding
17
Cable Type
18
Maximum Cable Length
18
Bus Structure
18
Pulse Output
20
Examples of Electrical Connections
21
Configuration and Display
22
Self-Check after Power on
22
Button Functions
23
Overview of Measured Value Displays
24
Voltage and Current
24
Frequency and Power Factor and Demand
25
Power
26
Energy Measurement
27
Configuration Menu
28
Set-Up Mode
28
Set-Up Entry Methods
29
Menu Option Selection
29
Number Entry Procedure
29
Change Password
30
DIT Demand Integration Time
31
Backlit Set-Up
32
Supply System
33
Pulse Output
34
Pulse Rate
35
Pulse Duration
36
Communication
37
RS485 Address
37
Baud Rate
38
Parity
39
Stop Bits
40
Clr
41
Modbus Communication Protocol
42
Input Registers, Function Code 04
42
Holding Register, Function Code 03/10
45
Dimensional Drawings
48
Connecting Example
48
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Weidmüller EM122-RTU-2P Specifications
General
Brand
Weidmüller
Model
EM122-RTU-2P
Category
Measuring Instruments
Language
English
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