Vertiv Liebert STS2/PDU - Comms Board

Vertiv™ | Liebert
®
STS2
™
100-1000A, 50/60Hz User Manual | Rev. 12 | 11/2017 14
6.5 Comms Board
The Comms Board provides a communication interface to Liebert SiteScan, a site monitoring product. Liebert
SiteLink
™
-12 or Liebert SiteLink-4 is required for Liebert SiteScan to communicate with the Liebert STS2.
The Comms Board is equipped with an RS-422 communication port for communication to a Liebert SiteScan
monitoring system using a two-wire twisted pair for reliable communication up to 1000 meters (3281 ft.).
Information available from the RS-422 port includes the present switch status information, all monitoring
parameters, and all active alarms.
Programming the Comms Board is performed through the touchscreen display. See Comm Options on page 90
for details.
See Figures 19 and 20 for the location of the Comms Board.
See Figure 24 for information on the control wiring.
6.6 Liebert IntelliSlot
™
SNMP/Web/Modbus 485 Card
A Liebert IntelliSlot SNMP/Web/Modbus 485 card enables the Liebert STS2 to communicate to a network
management system (NMS). The card provides the internal hardware and software to communicate, via
SNMP/Web (HTTP), to any IP-based Ethernet network through an RJ-45 connector using Category 5 cabling.
The Liebert SNMP/Web/Modbus 485 card provides redundant paths for communications that make it possible
to connect to a Building Management System (BMS) using Modbus, while simultaneously communicating to a
NMS through SNMP/Web (HTTP). A terminal block provides the connection to Modbus.
See Figures 19 and 20 for the location of the Liebert SNMP/Web/Modbus 485 card. See Figure 25 control wiring
information.
If you have questions about the Liebert SNMP/Web/Modbus 485 card, refer to the user guide, SL-52615, available
at the Liebert Web site, www.vertivco.com
6.7 LED Display
A light-emitting diode display is available to replace the standard liquid crystal display touchscreen control. The
display provides monitoring and control through a series of LED’s and buttons. LED’s alert you when a problem
occurs. A PC running terminal emulation software connected to the RS-232 port is needed to access the data
and configuration settings.