Electrical connections
Ex p relay
Power
Page 18 of 24
Rev. 0
20190910_Manual_Exp-Relais_Power_en.docx
Functional circuit diagram
Connection notes
DANGER
DEATH OR SERIOUS PHYSICAL INJURY WHEN THE COVER OF THE APEX
CONTROL UNIT IS OPENED IN AN EXPLOSIVE ATMOSPHERE.
Risk of explosion.
Before opening the lid of the enclosure, check the atmosphere for
any explosive gases.
ATTENTION
SHORT-CIRCUITS DUE TO LOOSE OR PROTRUDING WIRES IN THE EX P
POWER RELAY.
The Ex p relay may be damaged.
All core wires, including those not required, must be attached to a
terminal.
Lay the wires only in the space between the shield bus and the
connecting terminal.
Make sure that none of the wires are loose or jump out/protrude.
AVOID DAMAGE TO THE SEAL.
Cancellation of the Ex protection concept.
Visual inspection of the seal when closing the Ex p relay (cleanliness,
seat and integrity).
The procedure for connecting cables to the Ex p control unit is described in the
following:
Procedure:
Establish the electrical connections in accordance with the terminal
assignment. Terminals are designed in tension spring technology. A
suitable tool must be used for this purpose.
