FW_F112A_v1702_02_EN
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4.4.
INSTALLING THE HARDWARE
Electro static discharge does inflict irreparable damage to electronics! Before installing or
opening the F112-P, the installer has to discharge himself by touching a well-grounded
object.
Do ground the aluminum enclosure properly as indicated. 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.
This chapter shows general information regarding the electrical installation of the F112-P.
Chapter 5 gives additional specific information regarding Intrinsically safe installation and
overrules the information given in this chapter.
When installed in an aluminum enclosure and a potentially explosive atmosphere
requiring apparatus of equipment protection level Ga and Da, the unit must be installed
such that, even in the event of rare incidents, an ignition source due to impact or friction
sparks between the enclosure and iron/steel is excluded.
4.4.1.
GENERAL INSTALLATION GUIDELINES
In the F112-P, different types of bonding and earthing are used. The common (ground) is mostly
used for termination of the wire shields and the Protective Earth (PE) is used for electrical safety.
The F112-P that came with a power module type PM; 110V-230V AC or type PD/PF with an
option OR (the relays can handle 110V-230V AC) shall be connected to the Protective Earth (PE)
stud which is installed in the metal back panel. The metal front panel is connected to the
Protective Earth by the mounting screws and serrated washers.
For V AC applications, the terminal 00 shall not be connected to avoid earth loops.
For V DC applications, the terminal 00 shall be connected to the common (do NOT use for PE).
The wire screens (shield) are meant to prevent electromagnetic interference and shall be,
galvanic isolated, 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
Fluidwell unit, 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 insulated the wire
screen with a shrink tube at the Fluidwell unit side.
Separate cable glands with effective IP67 / TYPE 4(X) seals for all wires.
Unused cable entries: ensure that you fit IP67 / TYPE 4(X) plugs to maintain rating.
A reliable ground connection for both the sensor, and if applicable, for the metal enclosure
(above).
An 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.
Field mounted
Panel mounted
