AEC IST3-J, User Manual

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2 Overview User Manual
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Figure2-6 RS485 and dry contact
Figure2-7 Pin definition of RS485 and dry contact
The illustration of dry contact is as below:
1. CN1, CN2, CN3 determine that dry contact output signal is normal open or normal close.
In default, dry contact output signal is normal close, that is PIN1 connects with PIN2. If
one route signal needs to set to normal open, connect PIN2 with PIN3.
2. The requirements for input signal of dry contact: the voltage should be less than 60Vdc
or 42Vac RMS and the current should be less than 1.25A.
2.5 EPO Connector
When connecting two ports in the EPO connector together, UPS will close output. If it needs
to recover output, disconnect two ports in the EPO connector and power UPS off, and then
restart UPS.