User Manual
E126-P-EL
Page 42
FW_E126-P-EL_M_v0301-01_EN
Mount unit on a wall
1. Use the wall mount accessories (ACE03) to
attach the unit as shown and follow the
Assembly Instructions as supplied with the
accessory.
2. Remove the cover and the MEM (see
Section 6.2.3: Opening, assembling and closing
the unit [»37]
).
3. Attach the electrical cabling (see
).
101
mm
3.94
”
1
0
3
m
m
4
.0
6
”
<4Nm
6.4
ELECTRICAL INSTALLATION
When connecting cabling to the MEM and RSM (if applicable), always pull the cabling first through
the appropriate housing connector without stretching the cabling.
Remove the numbered connectors from the rear of the MEM to connect all cabling. After connecting
cabling, plug the connectors into the RSM first and then into the rear of the MEM when reinserting
the MEM back into the housing.
6.4.1
ELECTRICAL PRECAUTIONS
Explosion hazard
● A live circuit can cause an explosion. Do not open a powered-up unit when explosive
atmosphere is present.
● For battery powered equipment, never open the housing when explosive atmosphere is
present.
● When installed in a potentially explosive atmosphere that requires apparatus of equipment
protection level Gb and Db, 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
aluminum/steel is excluded.
Electrical precautions
● Ensure the unit is correctly wired according to the wiring diagrams and complies with local
codes and regulations.
● If this unit has a permanent connection (switch or circuit-breaker) to a supply, it must be:
○ installed near the unit and within easy reach of the operator,
○ marked as the disconnecting device for the unit.
● Except for the relay outputs R8 to R11, all unit connections must be low voltage defined as
“SELV” circuit per IEC 60950-1.
● The unit must be supplied from a “SELV” circuit defined as per IEC 60950-1.
● A suitable power supply should be considered in end-use equipment. This supply should
comply with a limited-energy circuit (maximum available current of 8 A); if not in compliance,
install an overcurrent protection device (e.g. fuse) close to the instrument with adequate
breaking capacity:
○ Fuse type: Time-lag (approved according to IEC60127-2 and/or UL248-14),
○ Fuse rating: Current: 5 A.
● Use Ex-d cable glands with effective IP67 (TYPE4X) seals when connecting cables. Fit Ex-d
IP67 (TYPE4X) blind plugs to unused cable entries.
● The cable entry plugs mounted in the housing must comply with the requirements of the
protection type used.
