Fluidwell F030-A, Руководство пользователя

Страница: 25 / 56

Page 25
FW-F030-P-M_v0404_01_EN.docx
(M4 x 6mm) with a serrated washer, a terminal and a washer is used (torque: 2 Nm). The metal front
cover is connected to the Protective Earth by the mounting screws with serrated washers.
To ground the panel mounted unit, the PE conductor must be connected to the metal front cover
through one of the four mounting screws. For this purpose, an additional nut, terminal and washer is
supplied.
Field mounted Panel mounted Front cover
Fig. 13: Protective Earth (PE) connections on metal enclosure
Plastic enclosure
When the F030-P is supplied with a non-metal enclosure (e.g. plastic), the field mount enclosure
meets the requirements of class 2 (double insulated). Therefore any incoming PE conductor can be
terminated with an insulating end cap.
When the F030-P is panel mounted, the installation class and protective earth requirements depend
on the panel or type of cabinet.
4.5.3 FIELD WIRING CONNECTIONS
•
Do ground the aluminum / stainless steel enclosure properly with a PE wire as indicated
to the Protective Earth terminal. It is the responsibility of the installer to install, connect
and test the Protective Earth connections in accordance with the local and (inter)national
Rules and Regulations.
•
When a power supply is connected to the field wiring connections, please also consider
the demands for power supply wiring shown in paragraph 4.5.4.
•
The installation must comply with (inter)national requirements and local ordinances.
o
Within the Europe Union and the UK, all installations must comply with national
regulations.
o
Within Canada all field wiring must conform to Section 18-156 of the Canadian
Electrical Code for installations within Canada.
o
Within the United States all field wiring must conform to the National Electric Code,
NFPA 70, Article 501-4(b).
All field wiring enters the F030-P through the bottom of the enclosure and connects to the circuit
assembly inside the enclosure. Wiring is routed through cable glands. Please make sure to order the
F030-P with the correct drilling pattern and thread (metal) or hole (plastic) sizes.
The wire screens (shield) are meant to prevent electromagnetic interference and shall be terminated
at one side to prevent ground loops. Connection of the screen can either be made to the common
ground terminal or at the sensor itself, whichever is appropriate to the application.
Inside of the Fluidwell unit, the various common ground terminals are connected to each other. It is
advised to terminate the wire screens in the vicinity of the sensor and to insulate the wire screen
with a shrink tube at the F030-P side.