Ex p Control unit
APEX
px
Electrical connections
Rev. 0
01-37A2-7D0001_px_Manual_Exp-Control-Unit_20210923_0_en.docx
Page 47 of 96
Connection terminals “Ex i”
Terminal row “X9”
DANGER
DEATH OR SERIOUS PHYSICAL INJURY DUE TO COMMISSIONING WITH
BYPASS KEY SWITCH IN POTENTIALLY EXPLOSIVE ATMOSPHERE.
Risk of explosion.
Have the commissioning with a bypass key switch approved by the
factory manager or his representative. Approval may only be given if
it has been ensured that there will not be any explosive atmosphere
for the duration of the commissioning or if the necessary precautions
have been taken to protect against the risk of explosion (fire permit).
A marking on the bypass key switch that the Ex protection will no
longer exist if the key switch is activated must be affixed in the direct
vicinity of the key switch.
The bypass key switch can be connected separately to the Ex p control unit.
The bypass key switch must be marked as shown in the following label and must
be attached in the immediate vicinity of the bypass key switch.
The position of the bypass key switch is requested with intrinsic safety by
control electronics.
