User Definable Voltage Alarm Transponder
Power Agent Systems LLC • 589 Bethlehem Pike, Montgomeryville, PA 18936215-310-6243 ph• 302-341-3193 fax • www.poweragentsystems.com
The Power Agent Systems' User-defined Voltage Alarm
Transponder (VAT) is designed to monitor voltage changes on
battery strings.

The VAT is installed alongside a UPS or DC Power Supply and
is connected via Ethernet to provide TCP/IP interoperability
with SNMP and HMS monitoring standards.

The VAT is a small device that has wires attached to the
positive and negative jars in a battery string eliminating the need
for switches, jumpers, or internal configuration settings,
making installation a true ‘plug & play’ process. The VAT’s
front panel has an Ethernet connector that can be interfaced
with any IP-based network.

The VAT has a built-in SNMP proxy, a built-in web server, and
a built-in SMTP mail client. The SNMP proxy supports SNMP
standard and HMS MIBs, making the VAT compatible with
virtually any network management software. HMS traps are
generated based on alarm conditions defined using the HMS
property MIB. The built-in web server allows the status of the
monitored supply to be analyzed from anywhere in the network
using a common web browser. This eliminates the need for
expensive client application software licenses. Web-based
monitoring is read-only as a security precaution. The built-in
SMTP mail client can be set up to send alarm messages to email
addresses or to a mobile phone when an alarm occurs.

The VAT is completely downloadable over the network,
facilitating firmware upgrades and feature enhancements as
they become available. The unit also contains a special
“Watchdog timer” that monitors the cable modem and
automatically resets it in case of a modem “hang” situation.
Features:
  • Embedded, integrated monitoring for voltage on any
    UPS or DC Power Plant
  • No switch, jumper, or other configuration settings
    required
  • Built-in SNMP proxy agent implements SCTE/HMS
    monitoring standards
  • Built-in web server allows convenient read-only
    monitoring from any computer on the network
  • Built-in SMTP mail client sends alarm messages to email
    addresses or to a mobile phone.
  • Fully downloadable operating firmware
  • Lowest cost voltage monitor

Monitoring Interfaces:
  • Two terminals
Measurements:
Analog Readings:
  • Individual battery voltage (up to 8 batteries)
  • AC output voltage
  • AC output current
  • Utility power AC input voltage
Note: User defined SNMP alarm thresholds can be set  for each
analog parameter
Digital Status Indications/Control:
  • Inverter standby status
  • Cabinet tamper status
  • Inverter general alarm status
  • Inverter output fail status
  • Forced standby control
Note: SNMP alarms can be programmed for each
monitored parameter
Power:
  • Input Power 24-60V DC; from battery string 7 watts
    nominal
  • Modem Power Output 12VDC nominal;1.0 A max.
Environmental:
  • Temperature -40C to +85C
  • Humidity 0 to 95%; non-condensing
Mechanical:
  • Size Fits in XM status monitoring slot
  • Construction PCB assembly
  • Weight 0.25 lb nominal

SNMP Information:
The following HMS and SNMP standard MIBs are
implemented in The VAT Proxy Agent:

ANSI/SCTE 36 2002 SCTE Root MIB
ANSI/SCTE 37 2002 SCTE Tree MIB
ANSI/SCTE 38-1 2002 HMS Property MIB
ANSI/SCTE 38-2 2002 HMS Alarm MIB
ANSI/SCTE 38-3 2002 HMS Common MIB
ANSI/SCTE 38-4 2002 HMS Power Supply MIB
ANSI/SCTE 38-7 2002 HMS TIB MIB.
SNMP MIB2
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