Functional earth
The functional earth must be connected. The connection must be made in accordance
with the earthing method of the system.
Options for connecting the functional earth:
•
Alternative FE connection
•
Pin or thread on M12 plug connector
•
M5 threaded holes on the rear or side of the housing
The functional earth must be connected with low inductance, i.e. with a sufficient wire
cross-section and the shortest possible length of cable.
The alternative FE connection allows a large wire cross-section, e.g., when using a
grounding strap.
4.4.2
Voltage supply
DANGER
Hazard due to lack of effectiveness of the protective device
In the case of non-compliance, it is possible that the dangerous state of the machine
may not be stopped or not stopped in a timely manner.
b
Make sure that the following control and electrical requirements are met so the
safety laser scanner can fulfill its protective function.
•
The power supply unit must be able to jumper a brief power failure of 20 ms as
specified in IEC 60204-1.
•
The safety laser scanner requires a supply voltage of 24 V. For details about
tolerances and further connected loads,
•
The power supply unit must provide safe isolation according to IEC 61140 (SELV/
PELV as per IEC 60204-1).
4)
•
Make sure that the safety laser scanner is provided with an appropriate electrical
fuse protection. Electrical data for calculating what fuse is required,
.
•
Use the same earthing method for all devices that are electrically connected to the
safety laser scanner.
•
Voltage must be supplied in accordance with SELV/PELV (IEC 60204-1) for all
devices that are electrically connected to the safety laser scanner.
•
All devices connected to a local input or output of the safety laser scanner must
be in the same SELV/PELV circuit as the safety laser scanner.
4.4.3
USB connection
The safety laser scanner has a USB connection for configuration and diagnostics.
The USB connection complies with the USB 2.0 mini-B standard (female connector).
The USB connection may only be used temporarily and only for configuration and diag‐
nostics. More information:
and
.
4.4.4
OSSDs
Safety laser scanners with local outputs can be directly integrated into the machine
controller.
The OSSDs are suitable for digital inputs as specified in IEC 61131-2.
4)
The voltage supply according to SELV has proven to be more reliable in demanding environments.
4
PROJECT PLANNING
48
O P E R A T I N G I N S T R U C T I O N S | microScan3 Core I/O AIDA
8017784/1ELL/2022-01-21 | SICK
Subject to change without notice
