5 Technical data
MANUAL TME400-VCF · EN08 · July, 01
st
2021
87
5.1.6. Cable
Signal cables (LF output, HF output, current loop connection, control input) must
have 2 or more wires twisted in pairs and shielded (LiYCY-TP).
4-wire, twisted and shielded cables (LiYCY-TP) must be used for the data cables
(RS-485).
The shielding must be grounded on both ends - on the TME400, as described in the
section
Cable cross-sections of 0.5 mm² are recommended. Due to the cable screw connec-
tion, the outer diameter of the cable must be between 4.5 and 6.5 mm.
Caution
The maximum cable length is limited when used in hazardous areas due to
the limit values for intrinsically safe current circuits and depending on the in-
ductivity and capacity of the cable.
5.1.7. Cable connection
Connect the shield on both ends to the cable screw connections on the outside of the
housing, as shown in the figure below:
•
Unscrew the union nut.
•
Pull the terminal insert out of the plastic.
•
Slide the cable end through the union nut and the terminal insert and bend the
shielding back.
•
Plug the terminal insert back into the connecting piece.
•
Tighten the union nut.
•
Every Ex signal circuit must be routed with a dedicated cable which must be
guided through the appropriate PG screw coupling.
Содержание TME400
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