For 24V systems with high capacity 2V cells

Sentry-1202 is a powerful battery health monitoring system for Telecom 24V system with 2V cells up to 3,000Ah capacity. This compact battery unit combines superior data quality and flexible installation to address most cell site applications for effective remote battery management according to the IEEE updated standards:

IEEE Std. 1188 – 2005: Recommended Practice for Maintenance, Testing, and Replacement of Valve-Regulated Lead- Acid (VRLA) Batteries for Stationary Applications (IEEE Link)

IEEE Std. 1491-2012: IEEE Guide for Selection and Use of Battery Monitoring Equipment in Stationary Applications (IEEE Link)

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• Onboard Battery State of Health (SOC) analysis.

• Reliable Remaining Runtime prediction.

• Compatible with MyBattery Platform™ for large scale deployment

• Easy integration to existing site management software

• Individual high resolution Internal Resistance / Conductance online measurement for 2V cells
• Individual inter-cell connection resistance to further improve IR accuracy
• Proprietary technology to monitor float current without external sensor
• Ethernet and Wireless M2M compatible, instant drop-in with no field configuration
• Battery Analyzer and MyBattery Platform™ compatible
• Modbus-RTU or Modbus-TCP for integration for 3rd party software
• Effectively priced for large scale applications

Specifications

Power Supply
Power Input	Powered by battery bus, 18-30V Maximum Consumption: 10W Average Consumption: 3W
Isolation	[email protected] to battery string
Current/Temperature Measurement
Current Sensor    (Optional)	Support  LEM HAS current sensor with internal +/-12V power supply    (Default range +/- 400A, window size 20mmx15mm)
Accuracy	0.1% + sensor accuracy
Temperature Sensors	1 ambient temperature sensor 1 pilot temperature sensor
Range	Measurement range: -40 to 65⁰C
Accuracy	1 ⁰C
Voltage Measurement
Battery	12 x2V cell, up to 3,000Ah
Bus Voltage	Range: 18 – 30V; Accuracy: 0.1%
Battery Voltage	+/- 3V for 2V batteries
Accuracy	0.1%
Input Wiring	2-wire differential input for each battery
Internal Resistance
Range and Resolution	0 to 3mΩ, 0.001 mΩ resolution
2-wire mode	Internal Resistance and discriminate Connection Resistance.
Communication
Serial Port	Isolated RS-232C and RS-485 ports
Modbus	MODBUS RTU, 9600-8-1-None
Ethernet	10/100Mbps BaseT with RJ-45    Onboard Ethernet DTU to MyBattery Platform Embedded web page for real-time data
Wireless Option	GSM/GPRS (PTCRB, AT&T, T-Mobile, Jasper, and Rogers Network Certified)
Indication and Alarm
LED indication	Dual-color LEDs for status    Orange LED for service alarm Red LED for urgent alarm
Alarm Outputs	Service Alarm (Normal Close, 0.1A)    Urgent Alarm (Normal Close, 0.1A)
Mechanicals
Dimensions	165W * 31H *165L (mm) (Mounting bracket excluded)
Mounting	DIN Rail, magnetic cup or customized bracket

*Specifications subject to change without notice

Sentry-1202 Datasheet (pdf)