5
Startup
Speed monitoring
Assembly and Operating Instructions – Explosion-Proof Gear Units
101
5.9
Speed monitoring
5.9.1
WEX option standard design
The standard version of the explosion-proof AR adapter features an M12×1 thread for
mounting a voltage encoder in the motor flange of the adapter. Speed monitor and
voltage encoder are included in the delivery.
5.9.2
Manufacturer's data
Speed monitor in WEX design:
Manufacturer:
P Fuchs, Mannheim
Type:
KFU8-UFC-Ex1.D
Auxiliary voltage:
DC 20 – 90 V/AC 48 – 253 V
ATEX certification number:
TÜV 99 ATEX 1471
Voltage encoder data in WEXA/WEX/IGEX design:
Manufacturer:
P Fuchs, Mannheim
Type:
NCB2-12GM35-N0 to DIN 19234 (NAMUR)
Housing:
M12×1
ATEX certification number:
TÜV 99 ATEX 1471
5.10
Installation and adjustment of the WEX speed monitor
1. Read the operating instructions of the speed monitor manufacturer before you be-
gin with the installation.
2. Perform the basic adjustment of the speed monitor in accordance with the operat-
ing instructions of the speed monitor manufacturer.
When the nominal speed of the motor in use is undercut by 5%, the settings
must cause the drive to be switched off. Refer to the nameplate for the nominal
speed of the driving motor.
The sensor integrated in the adapter generates 1 pulse per revolution of the adapter
shaft. If the switching speed of the adapter is too low, i.e. the coupling slips, the driving
motor must be disconnected from the supply voltage immediately.
The cause of the problem must be eliminated and the operation of the adapter must
be stopped for at least 15 minutes before re-startup. If incorrect operation by the oper-
ating personnel cannot be ruled out, this interval should be guaranteed using an auto-
matic restart lockout.
All following installation and setting notes given refer to the speed monitor or voltage
encoder in WEX design.
If the installation and setting instructions do not correspond to the speed monitor in-
cluded in the delivery, perform the installation and startup according to the document-
ation of the manufacturer.
The speed monitor must be located outside the potentially explosive atmosphere.
24804134/EN – 05/2018
