6
Electrical installation
6.1
Safety
WARNING
Electrical voltage
There is a risk of injury from electrocution while connecting the devices.
b
Disconnect the power for the entire plant/machine.
WARNING
Unintended start of the plant/machine
The plant/machine could inadvertently start while you are connecting the devices.
b
Disconnect the power for the entire plant/machine.
NOTICE
Enclosure rating IP20 only applies if the front connector is mounted.
6.2
Device connection
Prerequisites
Electrical connection requirement:
•
Electrical installation is performed in accordance with EN 60204-1.
•
The mounting rail is connected to the functional earth.
•
The voltage supply and connected signals meet the requirements for extra-low
voltages with safe separation (EN 60664) or NEC Class 2 (UL 1310).
•
The external voltage supply must be capable of buffering brief power failures of
20 ms as specified in EN 60204-1. Suitable power supply units are available as
accessories from SICK.
•
The GND of all connected devices must have the same potential as A2 of the main
module. Exceptions are actuators which are connected to an expansion module
with its own voltage supply.
•
The GND connections of the actuators to the safety outputs are in star formation
with the GND connection of the voltage supply.
Network cable requirement:
•
Type: 100Base-TX
•
Cables with RJ45 connections
•
Twisted pair Ethernet cable, maximum length 100 m in accordance with
EN 50173
•
Use of wire pairs 1/2 and 3/6
•
Shielded cables
•
Cat 5 STP or higher
ELECTRICAL INSTALLATION
6
8024589/2020-11-10 | SICK
O P E R A T I N G I N S T R U C T I O N S | Flexi Compact
35
Subject to change without notice