
CONTENTS
SAFETY PRECAUTIONS .........................................................................................................................................................3
DISCLAIMER ..........................................................................................................................................................................3
CONTENTS.............................................................................................................................................................................4
REVISION LOG .......................................................................................................................................................................5
1. VERIFICATION UPON RECEPTION....................................................................................................................................6
2. PRODUCT DESCRIPTION .................................................................................................................................................6
3. UNIT INSTALLATION........................................................................................................................................................7
3.1.- PRELIMINARY RECOMMENDATIONS ........................................................................................................................7
3.2.- INSTALLATION .........................................................................................................................................................8
3.3.- UNIT TERMINALS.....................................................................................................................................................9
3.4.- CONNECTION DIAGRAM.........................................................................................................................................10
4. OPERATION.....................................................................................................................................................................11
4.1.- OPERATING PRINCIPLE ...........................................................................................................................................11
4.2.- LED INDICATORS.....................................................................................................................................................11
4.3.- OPTICAL COMMUNICATIONS PORT........................................................................................................................ 12
4.4- RS-485 COMMUNICATIONS.................................................................................................................................... 12
4.4.1.- MODBUS/TCP PROTOCOL ............................................................................................................................. 12
4.4.2.- VARIABLES MODBUS .................................................................................................................................... 13
5. TECHNICAL FEATURES.................................................................................................................................................. 19
6. MAINTENANCE AND TECHNICAL SERVICE ................................................................................................................... 21
7. GUARANTEE................................................................................................................................................................... 21
8. CE CERTIFICATE ............................................................................................................................................................22
Note: The images of the units are solely for the purpose of illustration and may differ from the origi-
nal unit.
4
CEM M-ETH
Instruction Manual