Using Feedback-Free Module In Safety Applications; General Information; Important Information - Bosch Rexroth IndraControl S67 Series Application Description

DOK-CONTRL-S67DO8M122A-AP03-EN-P
Rexroth IndraControl S67 Digital Module 8 Outputs – 2.0 A (4×M12)
12

Using Feedback-Free Module in Safety Applications

12.1

General Information

12.2

Important Information

Due to its feedback-free feature, this module is suitable for passive use in
safety circuits.
If the field-sided supply is switched off via a safety control device, the safety
function of the module responses passively to the safety function. If the feed‐
back-free module is used correctly in a safety application, the "SIL" or the
"Performance Level" reached due to the switching as well as the category are
not affected. Refer to the following information and connection diagrams.
The absence of feedback of the digital output modules is supported starting
from the following technical module index:
Parts number
R911171789
R911171790
R911171791
R911171792
R911173105
R911172409
R911172900
Tab. 12-1: Technical index from which the digital output modules support the ab‐
sence of feedback
The technical index is specified on the module type plate (refer to the chapter
"Device Description", subchapter "Type Plate").
NOTICE
Only a power supply unit specified for an "Extra-low-voltage with safe electri‐
cal separation" (SELV/PELV) can be used for the 24 V supply voltage provi‐
sion.
NOTICE
The short circuit from a digital output to external voltages (e.g. 24 V field sup‐
ply voltages) results in a reverse feeding in of the field supply and thus the
loss of the safety function. To eliminate potential errors, connection lines be‐
tween the outputs of feedback-free modules and actuators are wired with pro‐
tection acc. to EN 60204-1 or EN ISO 13849-2.
NOTICE
A short circuit between two digital outputs of feedback-free modules is not
detected by the safety control device. The two-channel switch-off of feed‐
back-free modules is not a safety function. It merely serves to functionally
switch off the actuators.
Bosch Rexroth AG
Using Feedback-Free Module in Safety Applications
Type code
S67-DO8-M8
S67-DO8-M12
S67-DO8-M8-2A
S67-DO8-M12-2A
S67-DO8-M12×8
S67-DIO8-M8
S67-DIO8-M12×8
Only for SELV/PELV power supply units!
Prevent short circuits to external voltages at
digital outputs!
Short circuits between two digital outputs!
53/69
Technical index
AC
AD
AC
AC
AA
AA
AA