HIMA Z7138 PLC module programmable controller

HIMA Z7138 PLC module programmable controller

Technical data of product parameters

All mode switches must be in OFF position during operator panel use.
The mode switches should not be touched unless by qualified personnel.
The operator panel has four mode switches (DIP switches) located on the back of Z7138
the operator panel.Compact Flash cards of type I and II are supported by the operator panels.
Recommended Compact Flash memory cards are SiliconSystems SiliconDrive,
SanDisk Industrial Grade and Cactus 203-, 302-, 303-series.The operator panel’s Ethernet shield is directly connected to the chassis.
Check whether the other Ethernet unit has its shield directly grounded or grounded Z7138
via a capacitor.
In many cases, connecting the shielded Ethernet cabling to the chassis at both ends
is inappropriate. Hum or grounding loops can occur. Unshielded cabling may even
result in fewer communication errors.
A good solution may be to use a shielded Ethernet cable, but to connect the shield at Z7138
one end onlyThe operator panel’s Ethernet shield is directly connected to the chassis.
Check whether the other Ethernet unit has its shield directly grounded or grounded
via a capacitor.
In many cases, connecting the shielded Ethernet cabling to the chassis at both ends
is inappropriate. Hum or grounding loops can occur. Unshielded cabling may even
result in fewer communication errors.
A good solution may be to use a shielded Ethernet cable, but to connect the shield at
one end onlyWith longer distances, there is a risk that the ground potential may be different. In
that case, the shield should only be connected at one end. A good alternative is to Z7138
connect the other end of the shield to the ground via a 0.1 uF/250 V plastic
capacitor. Both ends are then connected to the ground in terms of HF, but only
connected to the ground at one end in terms of LF, thus avoiding the 50 Hz
grounding loops.

Product picture display

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This article from the temporal Ming sheng automation equipment co., LTD.,

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