Installation
FLOWSIC600-XT · Operating Instructions · 8018846/1BHP/V2-1/2021-05 · © SICK Engineering GmbH 69
Subject to change without notice
Serial port (RS485)
3)
RE-2Y (St)Yv with n x 2 x 0.5 mm² (n pairs) is suitable for transmitting the RS485 signals including the RS485
auxiliary voltage.
Ethernet
3.4.7 Checking the cable loops
Check the cable loops to verify that the cables are connected correctly.
▸
Disconnect both ends of the cable of the loop to be tested. This is to prevent connected
devices from interfering with the measurement.
▸
Test the entire cable loop between Signal Processing Unit and terminal device by mea-
suring the loop resistance.
▸
To test the insulation resistance as well, the cables must be disconnected from the
electronic module before using the insulation resistance tester.
Specification Remark
Type of cable Twisted pair, shielded,
3)
cable impedance approx.
100 … 150 Ω
low cable capacitance: ≤100 pF/m
Connect shield to ground terminal
Min./ max. cross-section 2 x 0.5 mm² / 1 mm² (20-18 AWG) Do not connect unused conductor
pairs and prevent them from
accidental short-circuit
Maximum cable length 300 m at 0.5 mm²
500 m at 0.75 mm²
Cable diameter 6 … 12 mm Fixing range of the cable glands
Specification Remark
Type of cable Cat 5 or higher
WARNING: Risk of explosion
▸
In non-intrinsically safe installations, the terminal boxes may only be
opened if the system is disconnected from the power supply.
▸
In non-intrinsically safe installations, the cables may only be disconnected if
the system is disconnected from the power supply.
▸
The terminal compartment cover must only be opened if the system is
disconnected from the power supply and only 10 minutes or more after the
system has been switched off, or the area is known to be non-hazardous.
NOTICE:
Applying test voltage to the cables before disconnecting them from the
electronics module can seriously damage the electronics module.
▸
Reconnect all cables after the loop resistance test.
NOTICE:
Incorrect cabling may cause failure of the FLOWSIC600-XT! This will invalidate
warranty claims. The manufacturer assumes no liability for consequential
damage.
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