Revised 2019-08-22
Hardware Installation
Drawing No. LP0988
Grounding the Switch
2-64
N-Tron
®
Series 700/7000 Managed Industrial Ethernet Switch Hardware Manual - Volume II
As an alternate, users can run a drain wire & lug from the screw provided
on the back 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 X1/4" 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
7026TX
and
7026TX
‐
AC
Models
For both the DC and AC power supply options for the 7026TX/7026TX-AC the power supply is isolated from
chassis ground. Therefore the user must not attempt to ground the switch to earth ground via the power supply. In
other N-Tron switches it is common to use the V- for the purpose of grounding. This must NOT be attempted in the
7026TX or 7026TX-AC.
In the case of the AC power supply option (i.e., 7026TX-AC) the chassis
can be connected to earth ground using the safety input of the input power
plug labeled “GND” (refer to the drawing in 2.4.3 that shows the pin-out of
the AC power plug) or using the ground lug located at the rear of the
chassis (see adjacent illustration).
In the case of the 7026TX, the only viable safety ground option is using the
ground lug at the rear of the chassis (see adjacent illustration)
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.
