N-Tron
®
Series NT24k
®
Compact Hardware Manual
2-82
Hardware Installation
Revised 2016-07-15
Grounding the Unit
Drawing No. LP0987
•
Unit does not power up properly or may cycle power on/off.
•
PoE ports being shut off
•
Excessive heat on the wire conductors may cause permanent damage.
•
Verify that the proper input voltage is connected to the NT24k before powering on the unit.
Never apply AC
power to a DC NT24k unit as it will permanently damage the unit.
•
Input power supply should be rated to at least 360 Watts of continuous power. Failure to use a properly rated
power supply may result in any or all of the following:
•
Power Supply damage
•
NT24k unit damage or sporadic operation
•
PoE ports powering down due to under voltage condition.
•
The NT24k can be configured to fault when either of the two supplies goes below a minimum voltage threshold.
2.4 Grounding the Unit
The grounding of any control system is an integral part of the design. The optimum noise immunity and emissions
are obtained when the NT24k chassis is connected to earth ground via a 12-14 gauge wire for the POE models
and 14-18 gauge drain wire for all other units. The NT24k units provide a ground lug (see illustration) that is used to
provide a safe grounding path of the device.
Note:
The NT24k power input (V-) pins are isolated from chassis ground. Do not attempt to ground
the switch to earth ground via the power input pins (V-).
Remarque:
La NT24k puissance d'entrée (V-) broches sont isolés de la masse du châssis. Ne pas
essayer pour mettre le commutateur à la terre via les broches d'entrée d'alimentation (V-).
