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O P E R A T I N G I N S T R U C T I O N S | safeRS3
8027489/2022-03-01 | SICK
Subject to change without notice
4 GET TO KNOW SAFERS3
WARNING
To use safeRS3 for a category 3 safety system, both the channels of a safety output
must be connected to the safety system. Configuring a safety system with only one
channel safety output may result in serious injuries due to an output circuit fault and a
failure of the machine to stop.
The dual channel safety output is automatically obtained by the safeRS3 Designer
application and it only matches the single OSSD outputs as follows:
l
OSSD 1 with OSSD 2
l
OSSD 3 with OSSD 4
In the dual channel safety output, the output status is the following:
l
activated output (24 V DC): no motion detected and normal functioning
l
deactivated output (0 V DC): motion detected in the protective field or failure
detected in the system
Idle signal is 24 V DC, periodically shortly pulsed to 0 V (pulses are not synchronous) for
the receiver to detect shortcut to either 0 V or 24 V.
The pulse duration at 0 V (T
L
) can be set at 300 μs or 2 ms through the safeRS3
Designer application (
Settings
>
Digital Input-Output
>
OSSD Pulse width
).
For details, see
Technical references on page 96
4.2.10
External resistor for OSSD outputs
To guarantee the correct connection between the OSSDs of the control and an external
device, it may be necessary to add an external resistor.
If the pulse width set (
OSSD Pulse width
) is 300 μs, it is strongly recommended to add
an external resistor to guarantee the discharge time of the capacitive load. If it is set at
