Revised 2019-08-22
Hardware Installation
Drawing No. LP0988
Grounding the Switch
2-66
N-Tron
®
Series 700/7000 Managed Industrial Ethernet Switch Hardware Manual - Volume II
2.5.4
Grounding
7900
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 the screw provided on
the side of the enclosure. In the event the provided grounding screw is lost,
care should be taken to limit the penetration of the outer skin by less than
1/4 in.
Note:
Recommend using a #6 32 x 1/4" 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.
