Revised 2019-08-22
Hardware Installation
Drawing No. LP0988
Grounding the Switch
2-44
N-Tron
®
Series 700/7000 Managed Industrial Ethernet Switch Hardware Manual - Volume I
2.5.1
Grounding
708TX,
708FX2,
716TX,
716FX2,
7018TX
and
7018FX2
Models
Both V- legs of the power input connector are connected to
chassis internally on the PCB. Connecting a drain wire to
earth ground from one of the V- terminal plugs as shown here
will ground the switch and the chassis. The power leads from
the power source should be limited to 3 meters or less in
length.
As an alternate, users can run a drain wire & lug from any of the Din-
Rail screws or empty PEM nuts on the enclosure. When using an
unused PEM nut to connect a ground lug via a machine screw, care
should be taken to limit the penetration of the outer skin by less than
1/4 in (NOTE: Recommend #6 32X1/4" Phillips pan head zinc
screw). Failure to do so may cause irreversible damage to the
internal components of the switch.
Note:
Before applying power to the grounded switch, you
should use a volt meter to verify there is no voltage
difference between the power supply’s negative output
terminal and the switch chassis grounding point.
Remarque:
Avant de mettre sous tension le commutateur de mise à la terre, vous utilisez un
voltmètre pour vérifier qu'il n'y a pas de différence de tension entre l'alimentation de la borne de
sortie négative et le commutateur de point de mise à la masse du châssis.
If the use of shielded cables is required, it is generally recommended to only connect the shield at one end to
prevent ground loops and interfere with low level signals (i.e. thermocouples, RTD, etc.). CAT5e cables
manufactured to EIA-568A or 568B specifications are required for use with Red Lion Switches.
In the event all CAT5e patch cable distances are small (i.e. All Ethernet devices are located in the same local
cabinet and/or referenced to the same earth ground), it is permissible to use fully shielded cables terminated to
chassis ground at both ends in systems void of low level analog signals.
2.5.2
Grounding
708M12
and
716M12
Models
Connect a drain wire with lug from the 708M12 or 716M12 switch
chassis to a known ground from the switch ground screw as shown
here. The power leads from the power source should be limited to 3
meters or less in length. Recommend using a Phillips pan head zinc
screw.
Note:
Before applying power to the grounded switch, you should use a volt meter to verify there is
no voltage difference between the power supply’s negative output terminal and the switch chassis
grounding point.
