Technical Information
Chapter
4
TiM51x
Electrical installation
8016425/YZK8/2016-07-07
©
SICK AG · Germany · All rights reserved · Subject to change without notice
12
4.3
Notes on electrical installation
When the cover of the USB socket is open or the USB cable is connected, the TiM51x
must not come into contact with moisture and dust. In this status, the TiM51x does not
correspond to any specified IP enclosure rating.
Use the supplied seal for the USB connection to prevent contact with moisture and dirt.
When operating the USB interface, ESD/EMC interferences can lead to an interruption
of the USB connection. To continue with the data transfer, disconnect the USB cable
from the TiM51x and reattach it to establish contact. To re-establish communication
between TiM51x and PC, select C
OMMUNICATION
> G
O
O
NLINE
in the SOPAS configuration
software.
Electrical connections between the TiM51x and other devices may only be connected
or disconnected when the system is not live, otherwise the devices may be damaged.
All connection cables on the TiM51x may not exceed a length of 3 m (9.84 ft) in order
to ensure that it conforms with the CE.
Conducting cross sections of the supply cable from the customer's power system
should be selected and perform in accordance with the applicable standards.
Protected the TiM51x with an external 0.8 A delay-action fuse at the start of the supply
cable from the point of view of the power supply.
All electrical circuits connected to the TiM51x must be designed as SELV or PELV elec-
tric circuits (SELV =
S
afety
E
xtra
L
ow
V
oltage, PELV =
P
rotective
E
xtra
L
ow
V
oltage).
When setting up a startup device with a 12-pin M12 male connector, do not wire the
reserved pins (e.g. as solder post)!
Do not switch on the supply voltage for the TiM51x until the connection work has been
completed and wiring work has been checked carefully.
4.4
Prerequisites for safe operation of the TiM51x in a system
The TiM51x is designed and tested for electrical safety according to the standard
IEC 61010-1 (ed. 3):
It is connected to peripheral devices (power supply, control, actuators) via shielded cables.
The cable shield e.g. of the supply line is therefore flush with the metal housing of the
TiM51x. The device can either be grounded via the cable shield or via the two straight
plates.
If the peripheral devices also have metal housing and if the cable shields also flush with
their housing, it is assumed that all devices involved in installation have the
same ground
potential
.
This is achieved by observing the following conditions for instance:
mounting of devices on conducting metal surfaces
professional grounding of devices/metal surfaces in the system
low-impedance and current-conducting equipotential bonding between areas with dif-
ferent ground potentials if necessary.
If these conditions are not met, e.g. on devices in a widely distributed system across several
buildings, equipotential bonding currents may, due to different ground potentials, flow via
the cable shields between the devices, which can lead to dangers.
