Vertiv
™
|
Liebert
®
NX
™
225-600kVA Installation Manual | Rev. 8 | 07/2017
24
3.3
M
ULTI
-M
ODULE
S
YSTEM
O
PTIONS
AND
A
CCESSORIES
The accessories and options listed in sections
3.1
through
3.2.1
may be applied to the individual modules in a
multi-module (1+N) system or a synchronized dual bus (2N) system.
3.3.1
Paralleling Cable Kit
A DB-15 module-to-module communication cable is required for 1+N parallel systems. A kit with two cables, each
82ft. (25m) long, is available. At least one kit is required for each add-on UPS module; the number of kits required
is one fewer than the number of UPS modules in the 1+N system (e.g., six UPS modules would require five kits).
3.3.2
Load Bus Sync Controller
Distributes common reference synchronization signal for up to two Liebert NX 225-600 UPS modules. A typical
installation would have two modules synchronized to a common bypass line.
3.3.3
Multi-Bus Synch Module (MBSM)
This module is available to support up six or up to 11 UPS modules, and is generally configured to synchronize all
modules to a reference bus (e.g., bypass line). See the manual for this module for more details.