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21
8015675/1EEU/2021-12| SICK
O P E R A TI N G I N S T R UC TI O N S | Flow-X
Subject to change without notice
INSTALLATION
4
4.3.2
General connection
The following Section only describes the connection to a single Flow-X module of a
Flow-X flow computer. Proceed accordingly when further Flow-X modules are to be
connected.
Fig. 14: General connection
4.3.3
Cable specification
Flow-X
flow computer
Pressure Temperature
Safe area
Ex zone
FLOWSIC600-XT
Volume flow (s.c.)
(Ex i isolating transformer only
required for intrinsically safe
installation)
Volume flow
a.c.
Ex i
Ex i
Ex i
p
T
Specification
Remark
Cable type
Twisted pair, shielded,
Cable impedance approx. 100…150 W
Low cable capacitance: < 100 pF/m
Connect shielding at other end to
ground terminal
Min./ max. cross-
section
2 x 0.5/1 mm
2
(2 x 20-18 AWG)
Maximum cable length 300 m at 0.5 mm²
500 m at 0.75 mm²
Do not connect unused
conductor pairs and prevent
them from accidental short-
circuit
Cable diameter
6 ... 12 mm
Clamping range of the cable
glands
Table 3:
Serial interface (RS485)
For more detailed information on cable specifications, refer to the “Cable specification”
Section of the “FLOWSIC600-XT” or “FLOWSIC600” Operating Instructions.