Festo CAMC-G-S3 Manual page 54

2 Product description of safety module CAMC-G-S3
After this first filter, a second "LPF" low-pass filter, which can be parameterised using the parameter
"Filter time constant" (P02.04/...), follows for each input signal, and is designed as a programmable
Mono-Flop. It is used for the following purposes:
– filtering out of external test pulses, e. g. of an active sensor with OSSD outputs.
– filtering out of the test pulses of DOUT4x in the case of passive sensors.
– filtering out of contact bounces.
In a downstream logic operation with comparator, the two input signals A and B are used to form the
logical control signal LIN_D40. In this section, the test pulses at the input are also analysed. To request
safety functions, the logical input is linked with the corresponding safety function (LIN_D40 = 1 means
that the safety function has been requested).
A sensor type can be selected using the parameter "Sensor type" (P02.24/...).
The inputs can be used in three different operating modes through the use of the "Operating mode"
parameter (P02.06/...):
– Operating mode = "Unused" (P02.06/... = 0), input is not used. The logical input signal LIN_D40 is
continually 0.
– Operating mode = "Equivalent" (P02.06 = 1), input switching equivalently: The inputs A and B of a
channel must show the same signal levels. The logical input signal LIN_D40 is inverse to the signal
level to DIN40, as Tab. 2.16 shows.
Input DIN40/ ... /43 Equivalent
DIN40A / ... / 43A
DIN40B / ... / 43B
Status LIN_D40 / ... /43
Tab. 2.16 Inputs switching equivalently
The inversion of the logical status corresponds to the idle current principle. Only use the
inputs according to the idle current principle and request the safe status through 0 V at
the input.
– Operating mode = "Antivalent" (P02.06 = 2), input switching antivalently: The inputs A and B must
show contrasting signal levels. The logical input signal LIN_D40 is inverse to the signal level to
DIN40A, as Tab. 2.17 shows.
Input DIN40/ ... /43 antivalent
DIN40A / ... / 43A
DIN40B / ... / 43B
Status LIN_D40 / ... /43
Tab. 2.17 Inputs switching antivalently
Passive sensors, which trigger an emergency stop of the system (STO, SBC, SS1), must,
according to EN 60204-1, have "forced opening" and be parameterised as equivalent
inputs.
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Idle state Safety function requested
24 V 0 V
24 V 0 V
0 1
Idle state Safety function requested
24 V 0 V
0 V 24 V
0 1
Festo – GDCP-CAMC-G-S3-EN – 1406NH – English