Festo CAMC-G-S3 Manual page 125

2 Product description of safety module CAMC-G-S3
Block diagram
Internal Brake
LOUT_BRAKE_CTRL
P02.36
P02.37
Fig. 2.32 Block diagram of the safe brake control in the basic unit
Term/abbreviation
LOUT_BRAKE_CONTROL
DRIVER + TEST PULSE GENERATOR
BR+_BASEUNIT/BR-_BASEUNIT
[57-0] IO_ERR
Tab. 2.79 Legend for Fig. 2.32
Output control signals BR+ / BR-
LOUT_BRAKE_CTRL
BR+_BASEUNIT
BR-_BASEUNIT
Tab. 2.80 Logic signals BR+_BASEUNIT/BR-_BASEUNIT
Error detection
Test pulses check the function of the high-side and low-side switches during operation. The test pulse
length can be parameterised (P02.37). When the safe brake control is energised, each circuit breaker in
the basic unit is checked separately, using test pulses. The pulse length can be parameterised. An in­
ternal feedback signal is used to measure the voltage at the safe brake output of the safety module.
The following faults are recognised:
– short from BR+ to 24 V.
– short from BR- to 0 V.
If there is an error, the error [57-0] IO_ERR is generated.
Festo – GDCP-CAMC-G-S3-EN – 1406NH – English
DRIVER
+
TEST PULSE
GENERATOR
Explanation
Logical output, brake activation
Driver and generation of test pulses
Internal signal: Brake activation
Internal error signal, error 57-0
Safe brake control not ener­
gised
1
0
0
BR+_BASEUNIT
BR-_BASEUNIT
[57-0] IO_ERR
Safe brake control ener­
gised
0
1
1
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