Sentinel 150P, 24 V/5 A nominal output.
Unit of Measure


Model Number


Electrical Connections

Electrical Connections for Sentinel 150P Programmable Switch Mode Chargers

Power Supply

Alternate Current (AC) Operating Voltage

N/A 95 to 265 V

Operating Frequency

N/A 47 to 63 Hz

Direct Current (DC) Charge Output

Direct Current (DC) Nominal Voltage

N/A 24 V

Maximum Current Limit

N/A 5 A

Voltage Ripple

N/A <1 %

Line Regulation

N/A <2 %

Load Regulation

N/A <2 %

Inputs and Outputs

Control Input

N/A Close to -DC to Activate Digital (Switch) Input Programmable Function

Alarm Output

N/A Programmable Function Relay Switched +DC

Maximum Current Rating at 30 Direct Current (DC) Voltage (Alarm Output)

N/A 1 A


Protective Cover Material

N/A 1050 Aluminum

Protective Cover Thickness

N/A 1.2 mm

Operating Temperature

N/A -30 to 60 ºC-22 to 140 ºF

Storage Temperature

N/A -40 to 60 ºC-40 to 140 ºF

Relative Humidity

N/A 20 to 90 %

Electrical Safety

N/A 2006/95/EC (EN 60065)

Electromagnetic Compatibility

N/A 2004/108/EC (EN 61000-6-2, EN 61000-6-4)


Overall Width (W)

N/A 4.28 in108.6 mm

Overall Height (H)

N/A 5.31 in135 mm

Overall Depth (D)

N/A 2.17 in55 mm

Fixing Holes (X)

N/A 3.90 in99 mm

Fixing Holes Diameter (F)

N/A 0.22 in5.65 mm


N/A 1.65 lb0.75 kg

Standard Output Calibration

Output Calibration Information

N/A Standard and custom output calibrations are selected using the SNTL150P-PCSUITE software tool. Calibration figures shown below are at 20 ºC. If temperature compensation is enabled, and remote SNTL-RTC temperature sensor 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.

Output Calibration Specification Table

Output Calibration Specification Table for Sentinel 150P Programmable Switch Mode Battery Chargers



  • Switch mode power supply technology: light and compact, power efficient with low heat dissipation.
  • Multi-stage, low ripple charging: 12 V/5 A or 24 V/5 A.
  • Versatile: OEM-configuration gives optimized output for different battery types, plus programmable I/O functions.
  • AutoBoost and temperature compensation.
  • Open-frame with protective cover, for surface mounting inside a panel.
  • For stationary engine, genset and standby power applications.



N/A 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, and reverts to float mode automatically at the end of the boost cycle, preventing battery over-charge and gassing.

Alarm Output and Control Input ('A' Option)

Alarm Output and Control Input ('A' Option)

N/A A' option models include a control input and alarm output, both with configurable functions. The input can be configured for use with panel relay circuits or operator switches, giving additional control over the output, e.g. AutoBoost initiation and termination. The alarm relay output can be configured to operate during a one or more (up to 7) fault conditions: mains fail, DC connection error, battery missing, temp sensor short, low battery volts, high battery volts, charge fail.

Temperature Compensation

Temperature Compensation

N/A 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.



N/A Sentinel 150P can be configured and monitored using a PC-based software tool, model SNTL150P-PCSUITE. The tool offers a number of standard 'profiles' for different battery types, but also allows OEM-customization of all parameters for fine control in any application. The tool also enables real time monitoring and metrics for both charger and battery.

Installation and Connection

Installation and Connection

N/A The Sentinel 150P uses an open circuit board construction with an aluminum protective cover, for surface mounting in an existing control panel. Electrical connection is by quick-connect, two-part type terminal blocks.



N/A Stock Code - 42.70.3619
Description - RTC sensor for remote temperature compensation feature, complete with 3 m/9.8 ft lead assembly. Non-standard lengths available to special order.

Stock Code - 42.70.3825
Description - SNTL150P-PCCONN programming kit. Includes SNTL150P-PCSUITE software tool (PC compatible), USB-TTL interface and power/data connection leads.



N/A A two year limited warranty on materials and workmanship is given with this product, details available on request.



N/A All part numbers are supplied with output calibrated for vented lead-acid cells. Output calibration can be optimized for different battery types by using the SNTL150P-PCSUITE software tool.

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.