datasheet for B120E

B Power and Auxiliary Relay Packs

Snaps in for easy installation

Fully self-contained transformer and relay

Zero Crossing for reliability and increased product life Essential component for ceiling mounted occupancy sensor

UL 2043 Plenum

Rated

Product

Overview

Features

PROJECT

LOCATION/TYPE

Description

Power packs provide 24VDC operating voltage to all Watt Stopper 24VDC occupancy sensors and

LightSaver controllers. Auxiliary relay packs are similar to power packs but have no transformer power supply, only an isolated relay.

Operation

Power packs consist of a transformer and highcurrent relay combined in one small, powerful package. The transformer has a primary high voltage input and a secondary, low voltage output

(24 VDC,114 mA with relay connected). The secondary voltage provides operating power to Watt

Stopper sensors. When the occupancy sensors detect motion or light sensors detect inadequate ambient light, they electrically close an internal circuit which sends 24 VDC back to the power or auxiliary relay packs that control the lighting system.

Plenum Rated

The B power packs are UL 2043 plenum rated with teflon coated low voltage leads and plenum rated plastic. This means that the power packs do not need to be installed in the junction box, but can be installed in the plenum. They are housed in ABS,

UL-rated 94V-0 plastic enclosures.

Applications

Watt Stopper power and auxiliary relay packs are designed to be flexible enough to control almost any lighting or HVAC load. For example, power packs can control lighting circuits, self-contained air conditioners, pumps, fans, motors, VAV systems, motorized damper controls and setback thermostats. They are excellent for any application which requires high voltage switching through low voltage controls. By linking power packs and sensors, an almost unlimited number of configurations can be obtained.

• Self-contained transformer relay system

• Available for 120, 220 to 240, 277 and 347 volt systems

• Capable of switching up to 20 Amps of electrical load (ballast)

• Installation in J-box not required

• Low voltage leads are teflon coated for use in plenum applications

• Can be used as a low voltage switch for other applications or as stand-alone low voltage switch

• 1/2 inch snap-in nipple attaches to standard electrical enclosures via 1/2 inch knockouts

• Zero crossing circuitry for reliability and increased product life (120, 277, 240 volt versions only) www.wattstopper.com

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Specifications

System

Layout

• Secondary voltage of 24 VDC

• Secondary output of 150 mA, 114 mA with relay connected

• Low voltage leads are rated for 300 volts

• UL-rated 94V-0 plastic enclosure

• UL 2043 plenum rated

• Dimensions: 1.6" x 2.75" x 1.6" (41mm x 70mm x 41mm) with a 1/2 inch snap-in nipple

• UL and CUL listed; Five year warranty

Power Pack Installation

Power Pack

High voltage connection made inside J-box

Power Pack Schematic

White

Neutral

Black (Hot)

Red

Red

(High Voltage)

Red (+24 VDC)

Black (-COM)

(Low Voltage)

Blue (+SW)

Wiring

Diagrams

Ordering

Information

Installation

Notes

Power Pack with Ceiling Sensor

Neutral

Hot

White

Black

Power

Pack

24VDC

Sensor

Red

Red

Load

Load

Switch

Auxiliary Relay Pack with Sensor

N White

Hot Black

Power Pack

White (neutral)

Red (line)

Off

Switch

Red (load)

L

O

A

D

BLU Control Output

BLK Common

RED +24VDC

Occupancy Sensor

Slave Pack Red (load)

Red (line)

Off

Switch

L

O

A

D

Hot

Neutral

Catalog No.

B120E-P*

B277E-P*

B230E-P*

B347D-P

S120/277/347E-P

Load Ratings

Description Input Voltage Ballast(A) Incan(A) Motor(HP) Output

Power Pack

Power Pack

Power Pack

Power Pack

Relay Pack

120 VAC; 60 Hz

277 VAC; 60 Hz

220-240 VAC; 50-60 Hz

347 VAC; 60 Hz

120/277/347 VAC; 60 Hz

20

20

20

15

20/20/15

13

-

13

-

13/-/-

* These power packs feature zero crossing

**Output is 150 mA before relay is connected and 114 mA after relay is connected.

Power packs are white; auxiliary relay packs are black.

1

-

1

-

1/-/-

24 VDC; 150 mA**

24 VDC; 150 mA**

24 VDC; 150 mA**

24 VDC; 150 mA**

1. All Watt Stopper power packs should be installed in accordance with state, local, and national electrical codes and requirements.

2. Power packs are designed to attach to existing or new electrical enclosures with 1/2 inch knockouts. (Check electrical codes in your area.)

3. Most applications require UL listed, 18-22 AWG, 3-conductor, Class 2 cable for low voltage wiring. For plenum return ceilings use UL listed plenum-approved cables.

Pub. No. 6707 www.wattstopper.com

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