Festo CAMC-G-S3 Manual page 49

2 Product description of safety module CAMC-G-S3
Passive sensors (two-channel)
Passive sensors are two-channel, contact-based switching elements. The connecting cables and the
function of the sensors must be monitored.
The contacts can switch antivalently and equivalently (according to the standard for the appropriate
switching element). Irrespective of this, safety functions are triggered as soon as at least one channel is
switched.
Examples of passive sensors:
– emergency stop switching devices (always equivalent)
– door contact switch (both antivalent and also equivalent)
– enabling buttons (both antivalent and also equivalent)
– two-handed control devices
– mode selector switch (1-of-n selection)
The following errors are detected by the safety module in the case of passive sensors:
– antivalent or equivalent input signals after the discrepancy time has elapsed, depending on the
sensor type and parameterisation
– If power is supplied via a safe output of the safety module:
Cross-circuits and shorts to +24 V and 0 V through the lack of the test pulses.
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.
Sensor types
Function Emergency
stop switching
device
Symbol
Input DIN40A/B ...
DIN43A/B
Output DOUT40A/B ... DOUT42A/B (cycle A/B)
1) Can also be supplied with test pulses from DOUT40 ... 42.
Tab. 2.13 Allocation of the sensors to the inputs and outputs (examples)
Emergency stop switching device
The emergency stop switching device is usually used to trigger an emergency stop. In most cases, the
safety function STO or SS1 is activated.
Door contact switch
This monitors whether a safety door, a light curtain, or similar is opened / passed through.
Festo – GDCP-CAMC-G-S3-EN – 1406NH – English
Door contact Enabling
switch buttons
DIN40A/B ... DIN40A/B ...
DIN43A/B DIN43A/B
Two-handed Mode selector
operator unit switch
DIN40A/B ... DIN45,
DIN43A/B DIN46,
DIN47
+24 V
1)
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