6
Electrical installation
6.1
Safety
WARNING
Personal injury due to improper supply voltage!
■
Only operate the device using safety extra-low voltage and safe electrical insula‐
tion as per protection class III.
NOTICE
Equipment damage or unpredictable operation due to working with live parts.
Working with live parts may result in unpredictable operation.
■
Only carry out wiring work when the power is off.
■
Only connect and disconnect electrical connections when the power is off.
6.2
Wiring instructions
NOTE
Pre-assembled cables can be found online at:
•
NOTICE
Faults during operation and device or system defects!
Incorrect wiring may result in operational faults and defects.
■
Follow the wiring notes precisely.
To ensure trouble-free operation, observe the following wiring instructions:
•
Terminate the bus with an active terminator at the start and end of every PRO‐
FIBUS business field. The two terminators must also be supplied with voltage
to ensure fault-free operation. Connect the external terminator to the “bus out”
connection on the distance sensor.
•
Connect the connecting cables in a de-energized state. Do not switch on the
voltage supply until installation is complete and all connection work on the device
and controller has been finished.
•
No earthing is required for the housing.
•
A twisted-pair cable is necessary for connecting the RS-422 serial interface or SSI.
•
Isolate the wires of unused digital outputs at the control cabinet.
•
Recommendation: Use a supply cable with a cross-section of at least 0.25 mm².
When operated with a 24 V DC supply and with a maximum switching current of
100 mA per switching output, the maximum length of cable up to the feed-in point
is 30 m.
•
Use proper connecting cables and male connectors for the application/environ‐
ment,
•
The specified enclosure rating of the distance sensor is valid only with suitable
mating connectors or with the protective cap installed.
•
Electrical protection class III/SELV or PELV supply voltage.
•
Use shielded cables. Position the screen on both sides and connect to earth on
the control side with a large surface area. Take appropriate measures to prevent
equipotential bonding currents flowing through the cable shield.
6
ELECTRICAL INSTALLATION
50
O P E R A T I N G I N S T R U C T I O N S | DT1000 PROFIBUS DP and DL1000 PROFIBUS DP
8024560/1A19/2021-06-30 | SICK
Subject to change without notice