LMX SERIES® OPERATION MANUAL
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2018 by Pacific Power Source, Inc. (PPS) • All Rights Reserved • No reproduction without written authorization from PPS.
LMX Series Power Source Operation Manual
Page 79 of 463
5.12.4
External Voltage Sense Connections
WARNING
HAZARDOUS OUTPUT: The power source output may be set to hazardous voltage levels. It
provides basic isolation from the ac input mains. Therefore, the external voltage sense must also
always be considered hazardous. Connections must be inaccessible to operator in all situations
when ac input mains voltage is applied.
Always disconnect power supply from the mains before connecting or disconnecting to the
hazardous external voltage sense terminals.
AVERTISSEMENT
SORTIE DANGEREUSE: La sortie de l´appareil peut être réglée à des niveaux de tension dangereux.
L´appareil fournit une isolation de base du réseau d'entrée AC. Par conséquent, les connexions de
sense externes doivent toujours être considérées comme dangereuses. Les connexions doivent
être inaccessibles à l'opérateur dans toutes les situations où la tension d´entrée secteur est
appliquée.
Toujours débrancher l'alimentation secteur avant de connecter ou déconnecter les bornes de
connexions de sense externes.
This paragraph describes connection of external sense leads to the LMX-Series Power
Source. External Sense wire size and methods are discussed.
The LMX-Series Power Source contains External Sense Circuits. These circuits measure
output voltage at an external sense point. Since this feature can be completely disabled, the
wiring detailed in this paragraph is optional. If the External Sense feature is desired,
connect the sense wires as described here.
Figure 5-14 and Figure 5-15
show external sense wiring for 1, 2, and 3φ systems. There is
little or no current flowing through the External Sense metering lines. Standard 22 AWG,
600 Volt (0.050” or 1.27mm ) control wire is recommended for this application. Twisting
the External Sense wiring is recommended and, in some cases, can improve performance. In
noisy environments, shielding may become necessary. If shielded cable is used, be sure to
ground the shield at one end only, to prevent the possibility of creating a ground loop.
When wiring the External Sense Leads to a DELTA load (refer to Section 0), connect the
Neutral terminal of the External Sense Terminal block to the Neutral terminal of the Output
Terminal block.
When the neutral wire is not used by the load on a split phase output (Two-Phase Output
Mode, refer to Section 0), connect the Neutral terminal of the External Sense Terminal block
to the Neutral terminal of the Output Power Terminal block. In cases where the load has a
