45
(Figure 4-14: Location of the Parallel Communication Cards)
4.1.8 Parallel Ports
The parallel ports are used to connect parallel UPSs to increase system capacity and
redundancy. With the provided parallel cables, up to eight UPS units with the same capacity,
voltage, frequency and version can be paralleled. Please only use the provided parallel
cables and adopt Daisy Chain method to parallel the UPS units.
Please refer to
5.4.5 Parallel Unit Wiring
to route the parallel cables.
WARNING:
One parallel cable is provided in each UPS’s accessory package. Using other
cables to parallel the UPSs may cause failure, malfunctions and accidents.
(Figure 4-15: Location of the Parallel Ports)
4.1.9 SMART Slot
1. You can install the optional relay I/O card (for dry contact expansion) into the SMART
slot. For installation and application, please contact Delta customer service.
For connection to the relay I/O card’s dry contacts, the signal cable routing is the same
as the REPO dry contacts’ signal cable routing.
2. If you use the Delta lithium-ion batteries, you must install the optional multifunctional
communication card (MFC) into the SMART slot to monitor the battery status. For
settings and information relevant to the Delta lithium-ion batteries, please refer to
7.6.4
Battery & Charging Setting
and
8. Optional Accessories
. For more information,
please contact Delta customer service.
For connection to the MFC parallel ports, the Ethernet cable*
1
routing is the same as the
UPS parallel cable routing.
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