The Honeywell HLSPS50, also cataloged as the HLSPS50 Power Supply Unit, operates as a dedicated hardware component for monitored direct current distribution and backup power management within fire alarm and security systems. The unit accepts primary line input voltages from 115 to 230 VAC, converting AC utility power into a regulated 28 VDC bus output across two monitored output channels.
Hardware Specifications
Parameter
Specification
Model
HLSPS50
Brand
Honeywell
Origin
USA
Weight
Standard Enclosure Weight
Dimensions
377 mm x 408 mm x 92 mm (W x H x D)
Operating Temp
-10 to 50 deg C
Power Consumption
150 W Max
Input Voltage
115 to 230 VAC, 50/60 Hz
Output Voltage
28 VDC
Output Current
5.0 A (Battery charging disabled)
Fault Relay Rating
1 A @ 24 VDC
Channel-to-Channel Isolation and Fault Monitoring
The HLSPS50 incorporates dual-channel isolated output terminals engineered to prevent common-mode noise transfer and ground fault propagation across field safety loops. The internal regulation circuit monitors output rails while executing automatic battery charging routines (300 mA for 7.2Ah batteries or 600 mA for 17Ah batteries). High-frequency filtering isolates downstream 4-20 mA HART loop protocol lines and digital detection circuits from AC line ripple, preserving signal purity across connected fire alarm infrastructure.
Frequently Asked Questions
Q: What size backup batteries can be installed directly inside the HLSPS50 enclosure? A: The physical cabinet internal battery room accommodates up to two 18Ah batteries.
Q: What is the maximum conductor size accepted by the main wiring terminal blocks? A: The terminal blocks accept power and field signal wiring up to 2.5 mm square CSA.
Field Installation Guidelines
Disconnect the primary AC mains circuit breaker prior to mounting or servicing the power supply cabinet.
Mount the enclosure securely using the four mounting hole centers located at 337 mm horizontally and 352 mm vertically.
Terminate primary 115-230 VAC mains wiring onto the protected input block, ensuring a minimum engagement of 5 full threads on terminal fasteners.
Route low-voltage 28 VDC output and fault relay wiring in separate raceways from high-voltage AC utility conductors with at least 200 mm clearance.
Connect the main cabinet grounding stud directly to the building earth ground electrode using a low-impedance copper wire.
