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4 Communication Interfaces
NOTE:
To purchase optional accessories, contact your service personnel. To learn
more about all available accessories, please refer to 9. Optional Accessories .
4.4 Parallel Ports
The two parallel ports are for UPS parallel communication. UPSs (at maximum eight) with
the same capacity, voltage and frequency can be coupled via the provided parallel cable to
run in parallel mode to increase capability and redundancy.
WARNING:
1. The provided parallel cable is placed in the accessory package. Using other
types of cables to connect the UPSs may cause malfunctions.
2. The provided parallel cable’s pin design is one-to-one, not crossed.
4.5 Parallel Switch
When you parallel UPSs, you need to set up the parallel switch to activate parallel function.
Please see 7.2. Parallel Units Operation Procedures for parallel switch settings.
4.6 Output Dry Contacts
The UPS provides six sets of programmable output dry contacts for you to receive UPS
events. The output dry contacts are normally open and have no default setting. There
are 21 events for you to select, and you can choose six of them to set up the output dry
contacts. To learn more how to set up, please contact your local dealer. For the nineteen
events, please refer to the table below.
No. Event Description
1 Load on inverter The UPS works in normal mode.
2 Load on bypass The UPS works in bypass mode.
3 Battery discharge/ Main input
NOK When the main AC source fails, the batteries
supply power to the critical loads.
4 Low battery When the UPS runs in battery mode, battery
voltage is lower than the setup limit, 220Vdc.
5 Bypass input NOK The bypass voltage, frequency or phase sequence
is abnormal.
6 Battery test fail or battery
missing During the battery test, the battery voltage is out
of the setup limit.