Operating instructions
NAV310
Electrical installation
8016535/1D2F/2022-11-14
© SICK AG · Germany · All rights reserved · Subject to change without notice
33
Chapter
5
Use safety transformer!
The output circuit of the power supply must be safely electrically isolated from the input
circuit, this feature is normally provided by a safety transformer in accordance with IEC 742
(VDE 0551).
5.3.2
Wire cross-sections
Wire all connections with copper cables!
Use the following wire cross-sections:
– supply voltage at least 0.25 mm² (0.01 in²), if local supply of power (power supply) in
the immediate vicinity
– supply voltage at least 0.5 mm² (0.04 in²) at maximum length of 10 m (32.81 ft), if
connection is made to an existing DC 24 V supply
– data interface minimum 0.25 mm² (0.01 in²)
Lay all cables such that there is no risk of tripping and all cables are protected against
damage.
On the usage of a typical power supply with a nominal voltage of DC 24 V ±5
%, the following
maximum cable lengths are allowed for the supply of the operating voltage:
5.3.3
General conditions for the data interface
The table below shows the recommended maximum length of cable as a function of the
data transmission rate selected.
Important
•
Use screened cable (twisted-pair) with at least 0.25 mm² (0.01 in²).
•
To prevent interference, do not lay data cable in parallel with power supply and motor
cables over a long run, e.g. in cable ducts.
5.4
Undertaking electrical installation on the NAV310
5.4.1
Equipment
•
Tool
•
digital multimeter (current/voltage measurement)
Only connect in electrically isolated state!
Ensure the power supply to which the
NAV310
is connected is switched off.
Wire cross-section
Cable length
0.25 mm² (0.01 in²)
5 m (16.4 ft)
0.5 mm² (0.02 in²)
10 m
Tab. 11: Maximum cable lengths for the supply voltage
Interface type
Transmission rate
Maximum cable length
RS-232
115,200 Bd
10 m
Tab. 12: Maximum length of cable for the data interface
