8.2.4
Required motors and measuring systems
Rexroth Motors
The motor and the measuring system are not subject to any specific
requirements in conjunction with the "L options" of safety technology.
For motors with integrated brake, observe the requirements mentioned in
chapter "
".
Third-party motors / optional measuring systems
The motor and the measuring system are not subject to any specific
requirements in conjunction with the "L options" of safety technology.
For motors with integrated brake, observe the requirements mentioned in
chapter "
".
8.2.5
Allowed motor holding brakes
When a drive controller with an "L4 option" is used, the brake connected to
the controller must meet the following requirements:
●
Control: When using the "L4" option, the brake must have been
designed in such a way that the holding torque of the brake takes effect
in the de-energized state (e.g., electrically releasing friction surface
brake).
●
Electrical connection:
–
The electrical connections of the brake must not have ground
reference.
–
The voltage range of the brake must correspond to the voltage
range of the supply voltage.
–
The output voltage of the power supply must stay within the range
specified for the brake, even in the case of an error. The safety
function does not provide any protection against overvoltage!
–
The brake current in the activated state must be between 0.1 A
and 1.25 A.
●
Mechanical system: When using the "L4" option, only friction surface
brakes are allowed as motor holding brakes. It is not allowed to operate
form-fitting brakes as motor holding brakes. The static holding torque of
the brake must have been dimensioned such that the maximum weight
of the load of the axis can be safely held. If necessary, the brake must
be cyclically tested for proper functioning.
For more detailed information on the dimensioning of the brake, please
refer to the corresponding C-standard.
In addition to the static holding torque of the brake, the required
dynamic braking torque of the brake must be considered. The
dynamic braking torque of the brake has a direct influence on the
behavior of the axis in the case of error and must be taken into
account in the risk assessment.
●
Reliability: The brake must have been authorized for ambient
temperatures from 0 to 40°C.
●
Test: The brake must tolerate test pulses (brake voltage switched off) ≤
1 ms without switching.
Bosch Rexroth AG
DOK-INDRV*-SI3-**VRS**-AP06-EN-P
Rexroth IndraDrive Integrated Safety Technology "Safe Torque Off" (as of MPx-16)
86/149
Commissioning the safety technology
LSA Control S.L. www.lsa-control.com [email protected] (+34) 960 62 43 01
