Installation Instructions
BZ-200, BZ-250, BZ-250-347
Power Pack
Auto/Manual
Mode Switch
BZ-250,
BZ-250-347 only
SPECIFICATIONS
Voltages
BZ-200, BZ-250...................... 120—277 VAC, 50/60 Hz, single phase
BZ-250-347............................. 120—347 VAC, 50/60 Hz, single phase
Load Requirements
Ballast/ELV/MLV/Incandescent/LED
BZ-200, BZ-250............................................. 20 A @ 120—277 VAC
BZ-250-347.................................................... 16 A @ 120—347 VAC
E-Ballast/CFL.................................................... 16 A @ 120—277 VAC
Motor
BZ-200, BZ-250...............................................1 HP @ 120/240 VAC
BZ-250-347................................................. 1/4 HP @120—347 VAC
Plug Load
(BZ-200, BZ-250).....................................................20 A @ 120 VAC
(BZ-250-347)............................................................15 A @ 120 VAC
Class 2 Output
BZ-200 (w/relay connected).................................... 225 mA @ 24 VDC
BZ-250, BZ-250-347................................................ 225 mA @ 24 VDC
Low Voltage Input, Control ON ............................................... 5—30 VDC
Operating Temperature.................................... -4°—131 °F (-20—55 °C)
Storage Temperature...................................... -40°—176 °F (-40—80 °C)
UL/C-UL Listed
DESCRIPTION
The BZ-2xx series of power packs are the foundation for any low voltage lighting
control system. The BZ-2xx series supplies low voltage power to occupancy
sensors and other control devices, switching line voltage in response to signals
from control devices. The BZ-2xx series of power packs attach to existing junction
boxes or mount into fixture wiring trays.
Low voltage wiring should use at least 22-gauge wire. High voltage connections
should be appropriately sized for the breaker and load. Always check local
building codes. After initial wiring is complete, check wiring diagrams to verify the
power pack is wired correctly. Improper wiring can cause damage to the power
pack, lighting system, occupancy sensors, and other control devices.
INSTALLATION
WARNING
TURN POWER OFF AT THE CIRCUIT BREAKER
BEFORE INSTALLING POWER PACKS OR SENSORS.
Wiring
1. Make sure power has been turned off at the circuit breaker.
2. Connect wires as shown in the wiring diagram below, or as shown in the
BI-LEVEL CONTROL section.
BZ-2xx
White
Neut.
Red
Red
Black
Hot
Lighting
Load
Ground
Blue
Black
Dry
Contact
Grey
Orange
Red
Low Voltage Wires
5-30 VDC In
Hold ON
Control
Common
+24VDC
5-30 VDC In
Hold OFF
Low Voltage
Momentary
Switch Option
Wiring
Brown
Any 3-Wire
24VDC
Sensor
NOTES:
• Orange, Brown, and
Grey wires are
applicable only to the
BZ-250 and
BZ-250-347.
• BZ-2xx power packs
should be grounded
to ensure signal
integrity, not for
safety ground.
Momentary Switch (optional)
2-wire Push Button
Grey
Manual ON
Red
24VDC
3-wire Momentary, DCC2
Grey
Manual ON
Red
24VDC
Install
Jumper
Wire
Multi-button Switch, LVSW-101
Do not use pilot or locator
light connections
Grey
Manual ON
S(x)
Red
24VDC
Com
Visit our website for FAQs: www.wattstopper.com
Installation Notes
1. 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.
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 plenumapproved cables.
4. The BZ-2xx is a Class 2 Output Power Supply, suitable for parallel
interconnection of up to 4 units maximum. This power pack is UL Listed for
Interconnection of Power Sources in accordance with National Electric Code.
Note: The BZ series uses an AC power relay and is not typically suited for highimpedance DC or dry-contact applications.
OPERATION
Control From Inputs
With the BZ-200, BZ-250, and BZ-250-347, the load can be turned ON and OFF
automatically using an occupancy sensor input. The BZ-250 and BZ-250-347
provide additional functionality allowing for low voltage input control from a
timer, panel, or BAS input, and manually from an optional low voltage momentary
switch. See the section on Low Voltage Inputs for details.
Auto ON/Manual ON Slide Switch (BZ-250/BZ-250-347 only)
Use the Mode Switch to select either the Auto ON mode, or the Manual ON mode.
The mode will take effect within two seconds.
Auto ON (Mode Switch UP - default)
The occupancy sensor input, Hold ON input, and the optional momentary switch
input can all be used to turn ON the load.
When the load is turned OFF using the momentary switch, the BZ-250 and
BZ-250-347 do not turn it ON automatically until after the sensor time delay
expires. However, pressing the momentary switch before the sensor time delay
expires will turn the load ON.
When the occupancy sensor’s time delay expires, the BZ-250 and BZ-250-347
revert to Auto ON mode and turn the load ON with the next input from the
occupancy sensor.
Manual ON (Mode Switch DOWN)
Occupants must press the low voltage momentary switch to turn ON the load.
When the occupancy sensor is the only input keeping the load ON, the load turns
OFF when the sensor’s time delay expires. If the sensor input re-triggers within
30 seconds after the load turns OFF, the load turns ON again. After 30 seconds
expire with no sensor input, press the momentary switch to turn the load ON.
Call 800.879.8585 for Technical Support
Local Manual Override Push Button
Press the button to manually toggle the power pack relay ON and OFF.
Power Loss Mode (BZ-250/BZ-250-347 only)
In the event of a power loss, this determines whether the loads will turn on, turn
off, or return to their previous state when power is restored. To set this, press and
hold the Local Manual Override Push Button for the amount of time shown in the
table below.
Action
Held
Held
Held
Held
Period
6s
9s
12s
>18s
LED
2-Flash
3-Flash
4-Flash
OFF
Mode
Last Load State
Turn relay ON
Turn relay OFF
Cancel-Exit and do not change mode or
configuration
LOW VOLTAGE INPUTS
Four 5—30 VDC input wires are provided to control the load relay. The inputs may
be used in combination or individually, depending on the needs of the application.
See the WIRING section for wiring information.
Control Inputs:
Control ON (Blue wire) – This input is intended for occupancy sensor input.
• Applying 5—30 VDC closes the relay in Auto ON Mode.
• Remove the voltage and the relay opens if no other input is holding it closed.
Hold ON (Orange wire, BZ-250/BZ-250-347 only) – This input is intended for timer
or panel input.
• Applying 5—30 VDC closes the relay in Auto ON Mode.
• Remove the voltage and the relay opens if no other input is holding it closed.
• This overrides Control ON input.
Hold OFF (Brown wire, BZ-250/BZ-250-347 only) – This input is used for timer,
panel, BAS or load shed input.
• Applying 5—30 VDC opens the relay.
• Remove the voltage and the relay can accept any other input.
• This overrides Control ON and Hold ON inputs.
Momentary Input:
Manual ON/OFF (Grey wire, BZ-250/BZ-250-347 only) – This input is for a low
voltage momentary switch.
• Applying 5—30 VDC momentary input changes the relay to the opposite state.
• This overrides Control ON, Hold ON and Hold OFF inputs.
Visit our website for FAQs: www.wattstopper.com
BI-LEVEL CONTROL
Red
BZ-2xx
(A)
Lighting
Load (A)
Red
Black
AUTO ON
Grey
Red
Orange
Blue
Low Voltage Wires
Ground
Black
Hot
White
Momentary Switch (A)
Brown
Control
NOTES:
• Orange, Brown, and Grey wires
are applicable only to the
BZ-250 and BZ-250-347.
Common
+24VDC
Any 3-Wire
24VDC
Sensor
• BZ-2xx power packs should be
grounded to ensure signal
integrity, not for safety ground.
Red
BZ-2xx
(B)
Lighting
Load (B)
Red
Black
MANUAL ON
Ground
Orange
Brown
Low Voltage Wires
Grey
Hot
White
Blue
Neut.
Black
As shown, upon occupancy
detection load A turns
ON automatically. To turn
ON load B, the user must
press momentary switch
B. Both loads turn OFF
automatically when the
sensor time delay expires,
or manually using switch
A and B. If the sensor
input re-triggers within
30 seconds after the load
turns OFF, loads A and B
turn ON again. After 30
seconds expire with no
sensor input, you must
press the switch to turn
ON load B.
Neut.
Red
The diagram to the right
shows how to configure
BZ-2xx to provide bi-level
lighting control with both
Automatic ON and Manual
ON features.
Momentary Switch (B)
Parallel interconnect for bi-level load control
from a single sensor with manual ON
LOW VOLTAGE OUTPUT OVERLOAD PROTECTION
The BZ-2xx contains built-in short circuit and thermal protection circuitry that
shuts down the +24 VDC output (low voltage red wire) to prevent permanent
damage to the power pack. Removing the excess load from the output restores
the BZ-2xx to proper operation. Connect the excess load to another power pack.
Output is current limited. As the load increases, the BZ output will reach its
model-specific maximum output current. Under these conditions, the output
voltage may appear less then the nominal 24-V output and the BZ will indicate
the overload conditions with a continuously blinking LED (as described in the LED
Indicator section). In extreme cases, such as a dead short, the output voltage will
appear near zero but will automatically return to normal operating conditions
once the excess load is removed.
Call 800.879.8585 for Technical Support
LED INDICATOR
The LED on the left side of the BZ-2xx indicates the following conditions:
• LED OFF: no power to the BZ-2xx, or the +24VDC output is shorted.
• LED blinking continuously: current output limit is exceeded (too many
sensors are connected to the power pack); +24VDC output shut down.
• LED ON, blinks once every 3 seconds: the relay is open (load OFF).
• LED ON continuously: the relay is closed (load ON).
TROUBLESHOOTING
The lights came ON automatically after I deliberately turned them
OFF for a presentation.
• The BZ-2xx is set for the Auto ON Mode and the occupancy sensor time
delay expired. The BZ-2xx reverted to Auto ON and then motion was
detected.
▸▸ Consider increasing occupancy sensor sensitivity and/or time delay.
▸▸ Generate more motion during presentations.
The load does not turn ON with occupancy detection.
• Mode Switch is set to Manual ON.
• Hold OFF input is active.
The load does not turn OFF after sensor time delay expires.
•
•
•
•
Hold ON input is active.
Check sensitivity on the occupancy sensor.
Verify that the time amount is the intended amount.
Verify that the sensor is not being retriggered by unintentional movement
or byplacement too close to a an air vent.
The load does not respond when I press the momentary switch.
• Check wiring.
The load does not come on automatically although the Mode Switch is
set to Auto ON.
• Cycle power to the unit to reset operating mode to Auto ON. Mode Switch
location was changed while the power pack was powered (line voltage).
The load comes on automatically with occupancy although the Mode
Switch is set to Manual ON.
• Cycle power to the unit to reset operating mode to Manual ON. Mode Switch
location was changed while the power pack was powered (line voltage).
No LED activity as described above.
• Check for excessive load.
• Check AC power.
Visit our website for FAQs: www.wattstopper.com
ORDERING INFORMATION
BZ-200
BZ-250
BZ-250-347
Power Pack
Power Pack
Power Pack
Input Voltage
120—277 VAC,
50/60 Hz,
single-phase
120—277 VAC,
50/60 Hz,
single-phase
120—347 VAC,
50/60 Hz,
single-phase
Ballast (A)
20
20
16
Incandescent (A)
20
20
16
Motor (hp)
1
1
1/4
Plug Load
Load Rating
Description
20 A, 120/240 VAC
15A, 120/240 VAC
24 VDC, 225 mA
w/relay connected
24 VDC, 225 mA
24 VDC, 225 mA
Auto/Manual-ON
Slide Switch
No
Yes
Yes
Control ON
Yes
Yes
Yes
Hold ON
No
Yes
Yes
Hold OFF
No
Yes
Yes
Manual ON/OFF
No
Yes
Yes
Override Button
Yes
Yes
Yes
No
Yes
Yes
Momentary Input
Control Inputs
20 A, 120/240 VAC
Output
Power Loss Mode
Call 800.879.8585 for Technical Support
WARRANTY INFORMATION
WattStopper warranties its products to be free of defects in materials and
workmanship for a period of five (5) years. There are no obligations or liabilities
on the part of WattStopper for consequential damages arising out of or in
connection with the use or performance of this product or other indirect damages
with respect to loss of property, revenue, or profit, or cost of removal, installation
or reinstallation.
2800 De La Cruz Boulevard, Santa Clara, CA 95050
800.879.8585 • www.wattstopper.com
19695r4 6/2015
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