Power Packs

SWX-900 SERIES

Overview

SENSORWORX power packs transform incoming line voltage power to low voltage as needed by sensors or other control devices. Additionally, they switch on/off power to the connected lighting load as directed by the sensors and controls. SENSORWORX power packs utilize a powerful microprocessor to optimize its switching timing in order to ensure long relay life even when controlling high-inrush LEDs and ballast loads. As with all SENSORWORX products, these power packs are easy to install and incorporate features which reduce contractor labor time. An elongated chase nipple and an optional snap-on low voltage wire chamber make for a hassle free contractor experience. All SENSORWORX products are proudly made in the USA.

 

Basic Operations

An input signal indicating occupancy from one or more connected sensors will signal the pack’s integrated relay to close. Once closed, line voltage will flow through the relay and turn on the connected lighting load. When the input signal indicates the occupied period has ended, the relay will open and lighting will switch off. This pack can also be configured to require a manual on switch signal from an occupant prior to turning on lighting.

Applications

  • Classrooms
  • Copy Rooms
  • Open Areas
  • Small Offices
  • Conference Rooms
  • Private Restrooms
  • Hallways

Features / Power Packs

  • Powers Low Voltage Sensors
  • Switches Line Voltage Loads
  • Electronically Timed Switching Ensures Long Relay Life
  • Plenum Rated (UL 2043)
  • Optional Snap-On Attachment Provides Chamber for Low Voltage Wire Connections
  • Optional Switch Input for Manual On, Hold On, or Hold Off Operation
  • Integrated Test/Programming Button

Specifications

Physical

SIZE
3.00” H x 2.25” W x 1.88” D
(7.62 cm x 5.72 cm x 4.78 cm)

WEIGHT
6.00 oz.

COLOR
Blue

MOUNTING
1/2” Knockout

Environmental

OPERATING TEMP
-10°F to 122°F (14°C to 50°C)

RELATIVE HUMIDITY
0-95% Non-Condensing, Indoor Use Only

ROHS COMPLIANT

Electrical

OPERATING VOLTAGE
120/277 VAC

OUTPUT VOLTAGE/CURRENT
18 VDC, 150 mA

RELAY CURRENT REQS
40 mA

MOTOR LOAD
1 HP

LOAD RATINGS
20A @ 120 V – General Purpose Plug Load

20A @ 120/277 VAC – General Purpose, Tungsten, Magnetic Ballast

16A @ 120/277 VAC – Electronic Ballast, LED Driver

DC LOAD RATINGS
20A @ 28 VDC (MAX)
1A @ 5 VDC (MIN)

Wiring Diagrams

Standard Wiring

Multiple Sensor Wiring

Multiple Power Pack Wiring

COMMON LINE FEEDS

 

Multiple Power Pack Wiring

SEPARATE LINE FEEDS

 

Power Pack with Secondary Relay Pack Wiring

Power Pack Connected to Switch

  • Some energy codes require Manual On (also called Vacancy) operation where an occupant is required to initially switch on lighting. The sensor then ensures lights are turned off once the space is unoccupied
  • Both maintained and momentary switches can be utilized
  • For maintained switches, any change of position will be read by the power pack as one action
  • For momentary switches, the power pack will react to switch press (versus switch release)

Power Pack with Switch Signal from External System

  • Typical for Hold On and Hold Off applications
  • BROWN switch input can be activated by external signals +5VDC or higher (i.e. logic high)
  • For hold on and hold off applications, switch input can also be configured to activate on logic low

Application Notes

Multi-zone and Bi-Level Switching

Rooms with multiple lighting zones or bi-level lighting often want one zone/level to switch on automatically, with the occupant able to manually switch on the additional zone/level if desired. Both zones/levels are then switched off automatically by the sensor once unoccupied. Two SWX-900-AX power packs are wired to switches, however one unit is set to Automatic On mode while the other is set to Manual On mode. In this configuration, lighting can be switched off manually or automatically via the occupancy sensor.

Load Shed / Hold Off Application

(e.g. OPEN OFFICES)

The occupancy sensor connected to both power packs normally keeps all lights on when the space is occupied. When a load shed (override off) command is given (by BMS, utility meter, etc.), lights connected to SWX-900-AX are held off. Remaining lights connected to SWX-900 are still controlled by the sensor.

 

Sensor Override / Hold On Application

(e.g. RETAIL)

During open hours, a signal from a time clock (connected to the BROWN switch input on the SWX-900-AX) holds lights on, regardless of occupancy. After hours, the clock’s schedule releases the hold on signal enabling the occupancy sensor to take over.

 

Power Pack Capacity

SWX-900 series power packs can supply power to several occupancy sensors and additional secondary relay packs. Following the below formula ensures adequate power will be available. Note the SWX-900’s relay has already been factored into the formula.

 

[ (# of PIR Sensors) x2 ] + [ (# of Dual Tech Sensors) x10 ] + [ (# of SWX-910) x55 ] < [ (# of SWX-900) x95 ]

 

 

Installation Options

Ordering Info

EXAMPLE MODEL # SWX-900-AX
 PRODUCT FUNCTIONALITY VOLTAGE AUX SWITCH INPUT 
SWXPower Pack9Single Relay + 150 mA Supply0120/277 V0NoneBlank
Secondary Relay1Auxiliary Switch InputAX
150 mA Supply2
ACCESSORYDESCRIPTION
SWX-999Snap-On Low Voltage Wiring Chamber

Power Packs Popular Model Numbers

SWX-900Power Pack | Single Relay + 150 mA Supply | 120/277 V
SWX-910Secondary Relay Pack | Single Relay | 120/277 V
SWX-920Secondary Power Supply | 150mA | 120/277V

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