Vertiv Liebert APM Plus - 10.3 Dry Contact Communication

10.3 Dry Contact Communication
The UPS provides the following two dry (optional) communication approaches:
• IS-Relay card
• Dry contact port of bypass module
10.3.1 Communication through IS-Relay Card
The UPS provides an IS-Relay card (optional) for the user to use dry contact signals to monitor the UPS. For the installation
and use of the IS-Relay card, refer to Liebert® IntelliSlot IS-Relay Card User Manual.
10.3.2 Communication through Dry Contact Port of Bypass Module
For on-site specific needs, the UPS may need auxiliary connection to achieve functions like acquiring external equipment
status information, providing alarm signals to external devices, and remote EPO. These functions are carried out through the
following interfaces on the bypass control module:
• Input dry contact port
• Output dry contact port
• REPO input port
For the functions and detailed information of these ports, refer to Wiring of Signal Cable.
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Vertiv™ Liebert® APM Plus User Manual