Installation34
2.7.6. Connecting Sensors to the Control Port
The UPS supports the Vertiv temperature and temperature/humidity sensors. The RJ-45 port is used for sensor
connection. See the appropriate gure for your model in Rear Panels on page 5, for the location of the port.
When connected, the sensor address must be 1 to 20.
The GXT5 supports two sensors:
• Liebert® IRM-S01T
• Liebert® IRM-S02TH
2.8. Installing a Parallel System
10- kVA, 16-kVA, and 20-kVA models may be congured in a parallel system. The UPS parallel system provides N
+ X (1 ≤ N + X ≤ 3, X=0 or 1) parallel conguration. N stands for the basic parallel sets, X stands for the redundant
sets.
All electrical requirements, including external-distribution panel and branch circuit breaker, apply to each UPS in
a parallel system, which are then connected in ring conguration for redundancy and additional reliability. System
load information can be accessed via any controller/display in the system.
The following are requirements for the parallel-connected system:
• Each UPS must have the same capacity and must be connected to the same mains/utility source.
• If a residual-current detector (RCD) is required, if must be correctly-set and installed before the same
neutral-line input terminal. See safety and regulatory information, available at https://www.vertivco.com/
ComplianceRegulatoryInfo.
• The output of each ups must be connected to the same output bus.
• The parameter conguration for each UPS must be identical.
• Because the parallel system is not tted with auxiliary-contact detection devices for the output circuit breaker
or the maintenance-bypass circuit breaker of each UPS, You must strictly-follow the procedures for transferring
between operating modes when removing a single UPS from the parallel system before maintenance and
when adding a single UPS after maintenance. Failure to observe the procedure may aect the reliability of the
load power supply.
Figure 2-12 on the next page, shows an example of the 10-kVA model connected as a 2 + 1 parallel system
connected in a ring conguration.
NOTE: 8-kVA models do not support paralleling at this time. NOTE: You must use Vertiv parallel cables for the
connection.
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