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Power Pack, 120-277V, 50/60Hz, 24VDC, 225mA, Wire Connector

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The BZ-50 Universal Voltage Power Pack provides 24 VDC operating voltage to Wattstopper’s low-voltage occupancy sensors. This device is constructed with environmentally friendly materials and is RoHS-compliant.

Connection Type Wire Leads
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  • Self-contained power supply relay system
  • Efficient switching power supply providing optimized current output based on number of sensors
  • LED indicates status of relay or if there is a low-voltage overcurrent
  • The product meets the materials restrictions of RoHS
  • Zero crossing circuitry for reliability and increased product life
  • UL 2043 plenum rated for cost-effective installation
  • 1/2”” snap-in nipple attaches to standard electrical enclosures through 1/2”” knockouts


General Info
Product Line Wattstopper
UPC Number 754182922901
Country Of Origin China
Application Sector Commercial
Warranty Type 5-Year
Product Width US 2.8 in
Product Weight US 0.3 lb
Product Volume US 28.1 cu in
Product Depth US 1.7 in
Product Height US 2.2 in
Additional Information
RoHS Conformant Yes This product meets the material restrictions of Article 4 of the RoHS Directive (2011/65/EU), including Commission Delegated Directive 2015/863.
Security   Yes This product is ioXt certified
Technical Information
Amperage 20 A
Voltage 120/277 V
Connection Type Wired


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Questions & Answers

I wired everything the way it says in the diagram but my motion sensor isn’t turning my lights off when I leave for 20min and the power back BZ-50 class 2 is flashing every 5 seconds seeing what the issue could be thanks.

Asked by: Jake
Please contact Wattstopper Technical Support @ 800-879-8585 for troubleshooting assistance.
Answered by: Justin
Date published: 2024-04-18

Can you use the Red 24VDC from 1 BZ-50 and connect to the blue input on another BZ-50 to control a load

Asked by: Luke
Hi Luke, No, you cannot hook up as described. Please follow the wiring diagram below to control more than one BZ-50 power pack from a single sensor.
Answered by: Tier 1 Tech Support
Date published: 2024-04-08

What is the Source/Sink limit in mA of the Blue Control Output wire?

Asked by: Paul Schmid
The transformer in the BZ-50 provides up to 225 mA of 24VDC power for the low voltage devices. The relay in the BZ-50 is switching and therefore does not have a Source/Sink mA limit. The relay will output either 120v or 277v depending on your input voltage.
Answered by: Justin
Date published: 2024-01-30

Trying to put these in an existing building, can I switch the power pack on and off with a switch in the room? Instead of the switch leg coming off the BZ-50? 

Asked by: Anonymous
Hello, The BZ-50 will allow a standard Line voltage switch to be installed on the Red switch leg wire.
Answered by: Justin
Date published: 2024-01-25

Can I use the BZ-50 to control 12watt Led wall lights? Max 3 fixtures, total 36w 120v

Asked by: Keith
Yes, as long as you do not exceed the 20A load limit.
Answered by: Tier 1 Tech Support
Date published: 2024-01-18

Is there a minimum load requirement for the BZ-50?

Asked by: Tristan
How much sensor can use this power pack
Answered by: Val
Date published: 2023-08-29

What is the recommended relay for the BZ-50?

Asked by: Aaron
Does the power pack needs a switch leg from the switch or can i use Switch leg from light for the sensor to work
Answered by: Keith
Date published: 2022-10-31

What is the maximum wire length for the BZ-50 output using 18 AWG wire?

Asked by: ClarkG56
The following attached image is a Tech Bulletin regarding Voltage Loss. It discusses wires lengths, gauges, and the corresponding voltages losses.
Answered by: Tier 1 Tech Support
Date published: 2022-05-31
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