Festo CAMC-G-S3 Manual page 22

2 Product description of safety module CAMC-G-S3
Please note
Technical failure or failure of the power supply will lead to a switch-off of the power
output stage of the motor controller. Safety limitations could be the result, depending
on the application.
The safety module monitors the safety of the axle as follows:
– In the CAMC-G-S3, there are two microcontrollers in a redundant structure. During operation, they
continuously compare all the relevant input and output signals as well as the data of the position
encoders.
– The safety functions in the CAMC-G-S3 are requested or activated via the digital safe inputs on the
safety module, by other safety functions or as an error response. Logic operations can be used to
set which digital inputs in which signal combination request a safety function.
– As soon as a safety function is active, safe monitoring of the status of the basic unit and axle takes
place.
– For this, the safety module detects the movement of the axle (position, speed) via the position en­
coder in the motor and, depending on the system structure, via a second measuring system.
– For this, the position sensors are connected to [X2A], [X2B] and [X10] on the basic unit, as usual.
The signals are forwarded internally to the safety module.
Important: The second measuring system on the axle may be essential, depending on the
requested safety classification and the axle configuration.
– If the axle is in the safe status, the safety function signals the status SSR, "Safe State Reached",
and, when the safety conditions are violated, the safety function signals the status SCV "Safety
Condition Violated".
– The safety module has safe digital outputs, in order to signal the safety status to the outside, e.g. to
an external safety controller or an additional CAMC-G-S3 or to supply digital inputs with test pulses.
– The safety module uses an internal device path to control the brake control output at the motor
connection [X6], thus allowing the safety function SBC in combination with an appropriately-certi­
fied clamping unit.
– An external clamping unit can also be activated via a safe digital output and an external safe switch­
ing device.
Important: To use the safety function SBC, a clamping unit with corresponding safety
classification must be used. For all types of holding brakes or clamping units without
certification, a risk analysis must be carried out and the suitability determined for the
appropriate safety application. Otherwise, these may not be used.
The holding brake in motors is not usually qualified and is thus not suitable.
22 Festo – GDCP-CAMC-G-S3-EN – 1406NH – English