Emerson Liebert iCOM Manual De Usuario

Liebert iCOM is capable of communicating with external monitoring systems, such as Building 

Management Systems (BMS), Network Monitoring Systems (NMS), Liebert's SiteScan

®

 Web and 

others.
Each Liebert iCOM-controlled cooling unit is equipped with Liebert IntelliSlot

®

 plug-in slots for use 

with optional communication cards. Two hot-swappable cards are available to provide remote 

communication to the Liebert iCOM.
The Liebert IntelliSlot

™

 IS-UNITY-DP communication card monitors and manages a range of 

operating parameters, alarms and notifications. Unity cards deliver:

• Emerson Protocol for Trellis

™

, Liebert SiteScan

™

 and Liebert Nform

®

• Embedded LIFE

™

 Technology for Remote Service Delivery

• SNMP (v1/v2c/v3) for Network Management Systems
• HTTP/HTTPS for Web page viewing
• SMTP for e-mail
• SMS for mobile messaging
• Modbus RTU-Modbus Remote Terminal Unit (RTU) communication protocol for Building 

Management Systems over a RS-485 serial network (also called Modbus RTU RS-485)

• Modbus TCP-Modbus Transmission Control Protocol for Building Management Systems over an 

Internet or LAN

• BACnet IP—BACnet over Internet Protocol for Building Management Systems over the Internet 

or a LAN

• BACnet MSTP—BACnet Master-Slave/Token-Passing (MSTP) communication protocol for 

Building Management Systems over an RS-485 serial network (also called BACnet MSTP RS-485)

The Liebert IntelliSlot Unity platform supports communication with up to two third-party protocols 

simultaneously. Velocity V4 monitoring protocol is required to ensure monitoring connectivity with 

the Liebert IntelliSlot IS-UNITY-DP. Velocity V4 protocol is standard in Liebert iCOM software 

version PA1.04.033 and later. 
Another communication option is the Liebert IntelliSlot SiteLink-E

®

 CARD (IS-485EXI), which 

provides ground fault isolated connection to a Liebert SiteLink-E for monitoring and management. 

The IS-485EXI is compatible with all Liebert iCOM software versions. See the Liebert Web site for 

the latest supported protocols, monitoring reference information and SNMP MIBs: 

A Monitoring Timeout/Handshake can be used with a building management system to verify 

communication between the Liebert iCOM and the BMS. The handshake or communication test is 

performed through a timer in the Liebert iCOM. If communication is OK, the BMS will update the 

timer periodically. If the BMS fails to perform a handshake within the specified period (e.g., 

monitoring panel failed) the Liebert iCOM will generate a BMS TIMEOUT event.