F012-P User Manual
FW_F012-P_M_v0501-01_EN Page 25
6.4 ELECTRICAL INSTALLATION
Hazardous area installations
The following chapter gives general information regarding the electrical installation of the
F012-P. Section 7: Intrinsically safe applications[»36] gives additional specific information
regarding intrinsically safe installation and has priority over the information given in this
chapter. Only F-Series with Type XI are fit for use in Hazardous Areas.
● Do not combine metal front covers with non-metallic rear covers, vice versa and / or cable
glands. A metal cover on a non-metallic rear cover could lead to ESD. A metal cable gland in a
non-metallic enclosure could invalidate isolation.
● The installation must comply with (inter)national requirements and local ordinances.
○ Within the EU and the UK, all installations must comply with national regulations.
○ Within Canada all field wiring must conform to Section 18-156 of the Canadian Electrical
Code for installations within Canada.
○ Within the United States all field wiring must conform to the National Electric Code, NFPA
70, Article 501-4(b).
● Electro static discharge can inflict irreparable damage to electronics! Before installing or
opening the product, always first discharge yourself by touching a well-grounded object.
● For reasons of ESD and safety, always ground the metal enclosure properly as indicated,
especially if your F-Series has been supplied with the 115-230V AC power-supply type PM or
relays type OR. It is the responsibility of the installer to install, connect and test the Protective
Earth connections in accordance with the (inter)national Rules and Regulations.
6.4.1 ELECTRICAL SAFETY
First consult the table with limiting environmental conditions and safety parameters in Section 6.1:
Installation / environmental conditions[»18].
General remarks
● Please note that the F012-P that came with a power module type PM will carry 110V-230V AC
when installed. In addition, units supplied with Type OR have relays which can handle voltages
up to 230V AC. Units carrying dangerous voltages shall be connected to the Protective Earth
(PE). Please check Section 6.4.2: Protective earth (PE) connections[»25].
● The wire screens (shield) are meant to prevent electromagnetic interference and shall be
connected to the common ground terminals that belong to the specific sensor connection.
● The wire screens shall be terminated at one side to prevent wire loops. Inside of the F012-P, the
different common ground terminals are connected to each other. It is advised, as illustrated, to
terminate the wire screens in the vicinity of the sensor and to insulate the wire screen with a
shrink tube at the F012-P side.
● Ensure a reliable ground connection for both the sensor, and if applicable, for the metal
enclosure.
● Use effective screened cable for the input signal, and grounding of its screen to the “┴ “ terminal
or at the sensor itself, whichever is appropriate to the application.
● Apply cable glands with effective IP67 / TYPE 4(X) seals for all wires.
● Close off unused cable entries: ensure that you fit IP67 / TYPE 4(X) plugs to maintain rating.
6.4.2 PROTECTIVE EARTH (PE) CONNECTIONS
Inside the product, different types of bonding and earthing are used. The common ground is mostly
used for termination of the wire shields; the Protective Earth (PE) is used for electrical safety.
For externally powered installations, route the Protective Earth (PE) grounding conductor into the
enclosure together with the incoming power conductors.
Risk of equipment damage
Be very careful when connecting the common ground of the system to Protective Earth (PE).
Connecting the common ground to Protective Earth (PE) (especially when multiple power
supplies are connected) can cause ground loop currents that could damage the equipment.
To Next Page
Loading...
Need help?
General
