Bosch Rexroth IndraControl S20 Manual page 41

DOK-CONTRL-S20*PSDO*8*-AP02-EN-P
IndraControl S20 Module With Safe Digital Outputs S20-PSDO-8/3
Error type
Error in the actuator
Despite being disabled, a switching el-
ement of the two-channel actuator
does not switch to the safe state
(e.g., a contact will not open).
Actuator cannot be enabled
(e.g., interrupt)
Other errors
(depending on the actuator)
Error in the wiring
Interrupt
Cable interrupt between output and
actuator or between actuator and
ground
Cross-circuit
Output to output
Short circuit
Output to ground
or
output to FE
Fig. 7-7 Two-channel
1
SF = safety function
2
OUTx = diagnostic message (LED) for each output X
Device diagnostics and behavior of the module in the event of an
error
Detec- Diag- Loss of
1
tion nostics SF
No None No
No None No
No None No
Yes All No
(condi- LEDs
tional) OUT:
red on
Yes Short No
circuit
or over-
load,
2
OUTx
Bosch Rexroth AG
Connection examples for safe outputs
Remark
No loss of the safety function as the second switching element of the
two-channel actuator can be disabled.
Detect errors using external monitoring.
Implement a restart inhibit in the event of this error.
Please note all errors that can occur in the actuator.
Test the shutdown capability of the actuator at suitable intervals.
Detect errors using external monitoring. Please note all errors that
can occur in the actuator.
Ensure that this error does not result in delayed system startup.
Please note all errors that can occur in the actuator.
Detect errors using external monitoring. Please note all errors that
can occur in the actuator.
Ensure that this error does not result in delayed system startup.
When the outputs are disabled, a cross-circuit between the outputs
is only detected if the test pulses are enabled. If an error is detected,
the module disables all its outputs.
If the test pulses have been disabled, test the circuit and the external
wiring at suitable intervals by enabling the outputs.
The error is detected in the ON state. The output is disabled (safe
state). The module cannot be switched on again with an edge from
"0" to "1" until the error has been removed and acknowledged.
WARNING
An operator acknowledgment can result in unexpected machine
startup.
• Please note that an operator acknowledgment can result in
the outputs being re-enabled.
39/82
Unexpected machine
startup