Connection Examples for Safe Outputs
Bosch Rexroth AG
DOK-CONTRL-ILPSDO8****-AW04-EN-P
Rexroth Inline Module with Safe Digital Outputs R-IB IL 24 PSDO 8-PAC
7.2
Notes on the Protective Circuit for External
Relays/Contactors (Free Running Circuit)
Fig. 7-3
Example of the free running circuit for an external relay
Disregarding this warning may lead to the loss
of the safety function
An external voltage may not be supplied in an output (e.g., via cross circuits).
These errors can adversely affect the operation of the module (or even destroy the
module) and thus result in the loss of the safety function. Therefore, these errors
must be prevented. Install the connecting cables for connecting the actuators so
that they are protected against cross circuits.
Please observe the load capacity of the outputs according to the technical data in
“Safe Digital Outputs” on page 18
.
WARNING
•
Limit the voltage induced on circuit interruption to < -15 V (e.g.,
with RC elements, suppressor diodes or varistors).
•
Please note that the free running circuit affects the fall time and
the service life of the contactor.
•
Please observe the specifications of the relay manufacturer
when sizing the relay protective circuit.
K1
69401021
