Sentry-NB4T monitoring unit provides powerful functions for online state-of-health battery management for large scale remote telecom, traffic control cabinets or radio stations. The compact design makes it suitable for any size indoor/outdoor cabinet with 12V or 6V battery blocks. It combines superior data quality and flexible installation, for effective remote battery management that meets IEEE updated standards:

IEEE Std. 1188: Recommended Practice for Maintenance, Testing, and Replacement of Valve-Regulated Lead- Acid (VRLA) Batteries for Stationary Applications (IEEE Link)

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Main Features

Sentry-NB4T Datasheet (pdf)

Advanced Feature	Description
Internal Resistance	Precise (4-terminal principle) Internal Resistance measurement for each battery. Can be displayed as Conductance/Admittance (setting on web page)
Temperature Points	Ambient temperature Battery temperature, 1 sensor for a string (recommended), or individual battery temperature
SOH Estimation	Analyze battery data over time and display string’s State-of-Health percentage
SOC Estimation	Calculate in realtime for State-of-Charge percentage
Runtime	Calculate runtime and display remaining minutes
Discharge History	Record Discharge/Deep Discharge event/counter
Thermal Runaway	Thermal runaway risk evaluation and alarm output [Alarm output can be connected to the charger for counter adjustments]
Active Balancing	Active balancing for individual battery to extend battery service life. Function can be turned ON/OFF remotely.
Modbus-TCP	Standard Modbus-TCP for integration
Web Page	Embedded web page Remote access to battery data Configure for different applications Set/adjust alarm threshold
Flexibility	18 to 72V voltage range. Fit directly to 2x12V (24V), 3x12V (36V), 4x6V (24V), 4x12V(48V)
Battery Analyzer	PC software to manage remote nodes and archive data to database
Large Scale Application	A single MASTER-800 mini-server (sold separately) can efficiently manage up to 1,000 remote nodes. Data and report for all nodes can be accessed via web browser.
MyBattery Platform	Compatible with secured MyBattery Platform™ for public cloud based remote monitoring. Technician can access battery data with phone or laptop.
SNMP	Both Battery Analyzer software and MASTER-800 mini-Server support SNMP. [Individual Node only provides Modbus-TCP]
Reliability	Metal compact case, industrial grade for indoor and outdoor applications
Easy Installation	Strong magnets and pre-made harness