Vertiv Liebert DM Series User Manual

Vertiv™ | Liebert® DM | User Manual 11
Overview
1.5.2. Electrical Heating
Vertiv™ Liebert® DM series uses a ceramic heater with Positive Temperature Co-eicient (PTC) which is highly reliable and
safe. A temperature sensor is provided on the surface of the heater that signals to cut o the power of the heater when the
surface temperature is too high. When the surface temperature decreases back to the normal temperature, the temperature
sensor signals the heater to start automatically.
Optional two-stage electrical heating can be provided according to customers’ requirement, which helps maintaining a more
precision control of the ambient temperature.
Figure 1-13 Electrical Heater
1.5.3. Communication Protocol
The Liebert DM air-cooled unit is equipped with standard Modbus RTU for monitoring.
1.5.4. Monitoring
The RDU-SIC card or Unity card is used in the Liebert DM series.
• Using the Web browser to monitor your equipment and the environment through the Web server function provided by
the RDU-SIC card.
• Using the Network Management System (NMS) to monitor customers’ intelligent equipment and the environment
through the SNMP agent function provided by the RDU-SIC card.
• Using the equipment room management software (RDU-Manager) to monitor customers’ intelligent equipment and the
environment through the TCP/IP port provided by RDU-SIC card.
• Using the centralized management software (Nform) to monitor customers’ intelligent equipment through the Vertiv
Server function provided by the RDU-SIC card.
• An industry-standard modbus communication protocol that allows the system to communicate with the host computer
and receive the control instructions from the host software through a unity communication card.

Vertiv Liebert DM Series Specifications

General

Brand	Vertiv
Model	Liebert DM Series
Category	Air Conditioner
Language	English