Installation guidelines
Deutschmann Automation GmbH & Co. KG
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UNIGATE fieldbus gateway for Fast Ethernet V. 2.1
21.4.11
10.2.2
Ethernet communication interface
10.2.2.1 Bus line with copper cable
This interface is located on the module in the form of a 8-pin RJ45 socket on the front side of the
housing.
•
Plug the 10/100 BaseT-connector onto the RJ45 socket labelled "10/100 BaseT" until it snaps
in.
•
Please note that the length of the line to the adjacent Ethernet participants does not fall below
0.6 m.
10.2.2.2 Power supply
The device must be powered with 10,8...30 V DC.
Please note that the devices of the series UNIGATE can not be operated with AC voltage.
•
Connect the supply voltage to the 5-pin or optional 2-pin plug-in screw terminal in accordance
with the labelling on the front panel of the device.
10.2.2.3 Shield connection
The module features two contact points for equipotential bonding and the shield of the RS end.
The shield connection on the Ethernet-side is connected to the equipotential bonding system via
an RC snubber circuit. This means that there are two electrically isolated shields in the device.
This guarantees higher interference immunity of the module since the "cable shield current"
which may be up to a few Amperes owing to potential differences between two bus users is not
discharged via the device.
If the device is subject to high mechanical or chemical stress, it is advisable to use a tin-plated
top-hat rail in order to ensure greater contact stability of the shield connection!
10.2.2.4 Equipotential bonding connection
•
Fit an earthing terminal to the top-hat rail directly next to the module. The earthing terminal
automatically establishes an electrical connection to the top-hat rail.
•
Connect the shield connection terminal to the earthing terminal using a flexible wire with a
diameter of 1.5 mm² which should be as short as possible.
•
Connect the top-hat rail to the equipotential bonding rail with as low an impedance as possible.
Use a flexible earthing wire with a cross-section of at least 10 mm² for this.
10.2.3
Line routing, shield and measures to combat interference voltage
This Chapter deals with line routing in the case of bus, signal and power supply lines, with the
aim of ensuring an EMC-compliant design of your system.
10.2.4
General information on line routing
- Inside and outside of cabinets
In order to achieve EMC-compliant routing of the lines, it is advisable to split the lines into the fol-
lowing line groups and to lay these groups separately.
