Liebert APM 30-300kVA;380/400/415V; 50/60Hz
Connectivity Solution
Liebert APM supports SNMP communication, Modbus protocol communication and dry contact
communication. This notes provides information relevant to these types of communication.
SNMP Protocol Communication
In Order to monitor the UPS through web network, user needs to select the SIC card . It is a network
management card which supports SNMP protocol.
It can also be connected to the IRM series sensor to provide environment monitoring function. Upon the
alarm generated by intelligent equipment, the SIC card notify the user by recording the log, sending trap
information, and By sending a mail.
The SIC card provides three approaches to monitor your intelligent equipment and equipment room
environment:

Web browser: User can use Web browser to monitor your intelligent equipment and equipment
room environment through the Web server function provided by the SIC card

NMS: To monitor your intelligent equipment and equipment room environment through the
SNMP function provided by the SIC card

SiteMonitor: It's a network management software to monitor your intelligent equipment and
equipment room environment through the TCP/IP interface provided by the SIC card
For the installation and setting information of the SIC card, refer to the Site Interface Web/SNMP Agent Card
User Manual.
Modbus Protocol Communication
The Modbus card helps to realize the conversion from UPS internal protocol to Modbus RTU protocol .
Consequently, user can use the Modbus RTU protocol to acquire the UPS switch values to achieve UPS
monitoring.
For the installation and basic setting of the Modbus card, refer to the UPS JBUS/MODBUS Adapter User Manual.
Dry Contact Communication
Liebert APM provides the following two dry contact communication approaches:

Relay card (optional) : The UPS provides an optional Relay card for the user to use dry contact
signals to monitor the UPS. The Relay card should be installed in an Intellislot port of the
communication box in the cabinet. For the installation and use of the Relay card, refer to 8.2.5 Relay
Card.

Dry contact port : 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 realized through the following interfaces on the
external interface board (EIB):
Input dry contact port

Output dry contact port

EPO input port
