Sentinel UL150 models include a self-diagnostic circuit for monitoring charge fail fault conditions (AC supply/fuse failure, DC fuse failure or low/no charge current), with a solid-state relay output for driving a remote alarm or fault annunciator. Enclosed NFPA models have NFPA 110 compliant alarms for AC failure, charge fail, high battery volts and low battery volts.

Calibration figures shown are at 20 ºC. If temperature compensation is enabled and remote SNTL-RTC temperature sensor is connected, output voltage automatically varies by 3 mV per cell per 1 ºC deviation from 20 ºC, within the range -10 to 50 ºC. Increasing temperatures give decreasing outputs; decreasing temperatures give increasing outputs.

AutoBoost provides a temporary increase in output voltage, equalizing the charge between cells and maximizing battery life and capacity. AutoBoost is triggered automatically when the battery falls below a preset voltage or can be initiated manually through a momentary switch input. At the end of the AutoBoost cycle, Sentinel automatically reverts to normal float charge mode, preventing battery over-charge and gassing.

AutoBoost provides a temporary increase in output voltage, equalizing the charge between cells and maximizing battery life and capacity. AutoBoost is triggered automatically when the battery falls below a preset voltage or can be initiated manually through a momentary switch input. At the end of the AutoBoost cycle, Sentinel automatically reverts to normal float charge mode, preventing battery over-charge and gassing.

The optimum charge voltage for lead acid and NiCd batteries varies with ambient temperature. Sentinel can be configured to sense battery temperature from a remote sensor and automatically compensate the output charge voltage.

UL-recognized SNTLUL150 model uses an open frame circuit board and base/heatsink with protected cover, for surface or DIN rail mounting in an existing control panel. UL-listed ESNTLUL150 models use a stainless steel, wall-mounted case.

Electrical connection is by screw terminal blocks. Connection and cable access on ESNTL models is by a hinged front plate and knock-out sections in the enclosure side.

UL Tested (listed or recognized) to: UL1236 - Battery chargers for charging engine-starting batteries, and CSA22.2 No. 107.2 - Battery chargers.

Dimensions for reference only. Use actual product for mounting template. For safe heat dissipation, mount product in orientation shown, with minimum air-gap clearance of 40 mm/1.5 in. above/below and 25 mm/1.0 in. at each side.

In order to consistently bring you the highest quality, full-featured products, we reserve the right to change our specifications and designs at any time. Murphy products and the Murphy logo are registered and/or common law trademarks of Enovation Controls, LLC. This document, including textual matter and illustrations, is copyright protected by Enovation Controls, LLC, with all rights reserved. (c) 2015 Enovation Controls, LLC. A copy of the warranty may be viewed or printed.