Connection System; General - Bosch Rexroth MAD Operating Instruction

DOK-MOTOR*-IDYN*A*EXPD-IB05-EN-P
Rexroth MAD and MAF Motors in EX px d Design acc. to ATEX Directive 2014/34/EU
9

Connection system

9.1

General

WARNING
● Make sure that the motor is only connected in de-energized state and a
non-explosive atmosphere.
● Before working on the system, always use a suitable measuring instru‐
ment (e.g. multimeter) to assure that the parts no longer have a residual
voltage (e.g. due to the residual energies of capacitors in filters, drive
devices, etc.). Wait for their discharging time.
● Do the protective conductor connection before any other connections.
● The motors have to be grounded over the power cable and over a sepa‐
rate potential equalization.
● In particular, make sure that the connection cables are installed in the
terminal box orderly and without tension to avoid abrasion or pressure
marks on the cables.
● The connection cables of power or encoder must not lay on the motor
surface during operation.
● The connection points to or on the control device must be located out‐
side of the explosive atmosphere.
● The ATEX motors may be operated only with Rexroth IndraDrive drive
controllers and connection cables. Controllers or cables from other man‐
ufacturers are not allowed.
The power connection is located on top and is provided only as a terminal
box in the case of ATEX motors.
The following connections must be made to ensure safe operation of the mo‐
tors:
● Power connection (incl. temperature sensor and holding brake, if appli‐
cable)
● Encoder connection
● Equipotential bonding connection
● Cooling connection
● Connect the purge gas with safety monitoring
Bosch Rexroth AG
Explosion hazard due to improper handling
during the connection of the motor!
35/69
Connection system