Parallel Ports; Smart Slot - Delta DPH Series User Manual

If one card works normally and the other works abnormally, the normal card's LED indicator
will illuminate green and the abnormal card's LED indicator will illuminate red.
During the initialization process, both cards' LED indicators flash yellow.
(Figure 4-9: 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. Up to three UPS units with the same capacity, voltage, frequency and version
can be paralleled. Please daisy-chain the parallel UPSs with the provided parallel cables
only.
Please refer to 5.4.4 Parallel Units Wiring to route the parallel cables.
WARNING:
One parallel cable is provided in each UPS's accessory package. Using non-Delta
parallel cables to parallel UPSs may cause failure, malfunctions and accidents.
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.
Regarding cable routing for the Relay I/O card's dry contacts, it is the same as the
communication interfaces. Please refer to 4.3 Cable Routing for the Communication
Interfaces.
(Figure 4-10: Location of the Parallel Ports)
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