Chapter 9 Communication 129
Liebert EXM 80kVA ~ 200kVA UPS User Manual
Chapter 9 Communication
The UPS supports SNMP protocol communication, Modbus protocol communication, and dry contact
communication. This chapter provides information relevant to these types of communication.
Refer to corresponding settings in Table 4-4 for communication protocol. Selecting 'Velocity' means the
system supports the Velocity protocol communication.
9.1 SNMP Protocol Communication
If you need to monitor the UPS through network, you may select the UNITY card or SIC card provided by
Vertiv Tech Co., Ltd. The two cards all support SNMP protocol.
Both the UNITY card and SIC card are network management cards which make the UPS developed by
Vertiv Tech Co., Ltd. real network equipment. It can also be connected to the IRM series sensor to provide
environment monitoring function. When the intelligent equipment generates an alarm, the UNITY card and
SIC card can notify the user by recording the log, sending trap information, and sending a mail.
The UNITY card and SIC card provide three approaches for you to monitor your intelligent equipment and
equipment room environment:
Web browser. You can use Web browser to monitor your intelligent equipment and equipment room
environment through the Web server function provided by the UNITY card or SIC card.
Network management system (NMS). You can use NMS to monitor your intelligent equipment and
equipment room environment through the SNMP function provided by the UNITY card or SIC card.
RDU-A, the network management software for equipment room power and envieonment. You can
use RDU-A to monitor your intelligent equipment and equipment room environment through the TCP/IP
interface provided by the SIC card.
The SIC card can also work with the Network Shutdown computer safe shutdown program developd by
Vertiv Tech Co., Ltd. to provide automatic safe shutdown function for your computer installed with
Network Shutdown, so as to avoid data loss.
The UNITY card should be installed in the Intellislot port (see Figure 3-8) in the UPS.
For further description of the IS-UNITY card, refer to Liebert IntelliSlot Unity Card User Manual–Web,
SNMP, Modbus, BACnet, YDN23 in accessory.
For the installation and setting information of the SIC card, refer to Site Interface Web/SNMP Agent Card
User Manual for details.
9.2 Modbus Protocol Communication
The Modbus protocol communication is supported by UNITY card and SIC card.
9.3 Dry Contact Communication
The UPS provides the following two dry contact communication approaches:
IS-Relay card
Dry contact port
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