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Other Features
External communications
Refer to the SC200 system controller handbook for information on these communications
options:
Communication with DCTools via USB
•
Communication with DCTools or PowerManagerII via RS232
•
Communication with DCTools or PowerManagerII via an external PSTN or GSM modem
•
(dial-in and dial-out on alarm)
Communication with DCTools or PowerManagerII via Ethernet
•
Communication with any web browser software via an IP network
•
Communication with a Network Management System (NMS) using SNMP
•
Communication with a Building Management System (BMS) using Modbus
•
Alarm and status messages to GSM Short Messaging Service (SMS) text capable cell
•
phones
Communication with an alarm management system using voltage-free relay contacts (on
•
an IOBGP I/O board).
Low Voltage Disconnect (LVD) option
Core Power Solutions may be fitted with one or more Low Voltage Disconnects (LVDs). The
LVD(s) can be connected either as load or battery disconnect(s).
LVDs have two purposes:
to protect a VRLA battery from deep discharge and premature failure, and/or
•
to reduce the load on a battery under discharge so that high priority equipment operates
•
for a longer time after an ac supply failure.
The system controller has two LVD control channels (LVD1 and LVD2.) These can be set to
disconnect at specified voltages or can be set to disconnect a specified time interval after an ac
supply failure. Both channels reconnect the battery or load equipment when the ac supply is
restored.
Refer to the system controller handbook for information on how to configure the LVD
channels.
Battery Mid-point Monitoring Description
Battery Mid-point Monitoring provides a cost-effective method for the early detection of
internal battery faults. The voltages of the two halves of a battery string are measured and the
system controller generates an alarm signal if a voltage imbalance is detected.
A voltage imbalance is an indication that one or more cells has an internal fault. Further
investigation can then isolate the faulty cell(s) and action can be taken to correct the problem
and prevent a total battery failure.
To connect the Battery Mid-point Monitoring option see details on page 36, on page 36. If a
String Fail alarm is generated see Troubleshooting on page 46.
To ensure reliable operation Mid-point Monitoring operates only when the battery is in float
charge and after a configurable lockout period since the last battery discharge, Fast Charge,
Equalize or Battery Test.
Copyright © 2008-2009 Eaton Corporation. All Rights Reserved.
IPN 997-00012-71B
July 2009
General Description
7
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