ETHERLINE® GUARD | Issue 1e | 11.04.2022
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4.1 Connection of the power supply
The ETHERLINE GUARD has to be connected with 24 V DC at the wide-
range input "18 ... 30 V DC" and "GND". The "FE" connection is for the
functional earth. Connect this properly to the reference potential.
The housing of the ETHERLINE® GUARD is not earthed.
Please be sure to connect the functional earth connection ("FE") of the unit to the reference potential of
your control cabinet or system structure to ensure correct ESD discharge of the antenna and network
sockets.
If the unit is used in a manner not specified by the manufacturer, the protection provided by
the unit may be impaired. Pay particular attention to correct contacting when installing the cables. Always
refer to the current documentation first in case of problems. Connected circuits must comply with the
requirements for limited energy circuits according to UL61010-1.
4.2 Connection of the line to be monitored (DATA)
The ETHERLINE® GUARD has two RJ45 connections (DATA) for the link to be monitored, whereby the
cable to be monitored must be connected to the RJ45 connection marked DATA + GUARD. The
ETHERLINE® GUARD is looped into the cable to be monitored via these two connections.
The cable to be monitored (e.g. a trailing cable) must be connected to the lower connection ("Guard").
The upper DATA port should then be connected to the communication partner (e.g. the control unit) with
another commercially available industrial Ethernet cable.
The cable measurement is carried out at the lower connection "Guard DATA" over the entire cable
(minimum length 2m) to the connected communication partner.
The ETHERLINE® GUARD does not change the content of the data transmission between the DATA
connections.
Data transmission between the two DATA connections only works when the ETHERLINE® GUARD is
supplied with voltage and is in normal operating mode!
