Siemens ET 77E Series Especificaciones descargar pdf (Pagina 9)

SD77

Do not exceed 42 Vdc in service.

WARNING

Ex nA models are shipped with the sealing screw fitted externally. Do not remove the

sealing screw. Do not remove the condensation drain sealing screw where a 4 or 4X

Enclosure Type is required.

Refer to Section 2 Installation.

Model Number:

All ATEX approved units require 4-20 mA input with output range as selected from the table below. The model

number is 77-16X, where “-“ may be replaced by, “E”, “B”, “S”, or “T”, per the Model Designation section, and

“X” is replaced by an Intrinsic Safety Code, from the following table, that corresponds to the desired output range.

Code

Certification Output Range

B1 Ex ia 3-15 psig

B2 Ex nA 3-15 psig

B3 Ex ia 0.2-1 bar

B4 Ex nA 0.2-1 bar

B5 Ex ia 0.2-1 Kg/cm2

B6 Ex nA 0.2-1 Kg/cm2

1.3.2 Supplemental Instructions for ATEX Certified Models

This section provides details concerning the installation, operation, and servicing of the ATEX certified equipment

described in this Installation Instruction.

1. Refer to the ATEX certificate for the described equipment for a list of possible operating faults and special

conditions that should preclude possible misuse.

2. Process and environmental materials shall be compatible with the elastomers used in the manufacture of the

equipment: neoprene, nitrile rubber, silicon, and buna-N.

3. ATEX certified equipment is to be serviced by a factory-authorized repair facility. For a list of these facilities,

refer to the attached manual, the Siemens Internet site or contact your local Siemens’ Process Instrumentation

division representative.

4. The equipment is not to be installed and operated in a hazardous area containing explosive dust.

5. The equipment, when installed in accordance with this Instruction, may not be subjected to mechanical stress in

excess of the design specification.

6. The equipment has been designed such that it does not:

1) Give rise to physical injury or other harm due to contact

2) Produce excessive surface temperature or infra-red, electromagnetic, and ionizing radiation

3) Have non-electrical dangers

7. Do not install the equipment where it can be subjected to excessive mechanical and thermal stresses or where it

may be attacked by existing or foreseeable aggressive substances.

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Siemens ET 77E Series Especificaciones Pagina 9