legrand BZ-150 Universal Voltage Power Pack Instruction Manual
- June 13, 2024
- Legrand
Table of Contents
No: 24577 – 04/20 rev. 4
Wattstopper®
Power Pack
Installation Instructions
Catalog Numbe
Country of Origin: Made in China
BZ-150-U is BAA and TAA compliant (Product produced in the U.S.)
SPECIFICATIONS
Voltages …………………………………….120/277VAC,50/60Hz ………………… 230/240 VAC (Single
Phase), 50/60Hz
Load Requirements
Ballast, Incandescent ………… 20amp @120/277VAC
Eballast …………………………………. 16amp @277VAC
Motor ………………………………….. 1HP @120/240VAC
Output ……………..225mA @24VDC (with relay connected)
Low Voltage Input
Control ON ………………………………………..12-24VDC
Hold ON ………………………………………….. 12-24VDC
Hold OFF …………………………………………. 12-24VDC
Manual ON (momentary switch required) … 12-24VDC
Operating Temperature …………………..32°-104°F (0-40°C)
DESCRIPTION
The BZ-150 power packs is the foundation for any low voltage lighting control
system. The BZ-150 supplies low voltage power to occupancy sensors and other
control devices, switching line voltage in response to signals from control
devices. The power pack is attached to existing junction boxes or mounted into
fixture wiring trays.
High voltage connections should use at least 14-gauge. Low voltage wiring
should use at least 22-gauge wire. Always check local building codes. After
initial wiring is complete, check wiring diagram to verify power pack is wired
correctly. Improper wiring can cause damage to power pack, lighting system,
and occupancy sensor.
INSTALLATION AND WIRING
- Make sure power has been turned off at the circuit breaker.
- Connect wires as shown in in the following diagrams, depending on
At least three sensors can be powered by the power pack.
Installation Notes
- Power packs should be installed in accordance with state, local and national electrical codes and requirements.
- Power packs are designed to attach to existing or new electrical enclosures with1/2 inch knockouts.
- For the BZ-150, 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.
- The BZ-150 is a Class 2 Output Power Supply, suitable for parallel interconnection of up to 10 units maximum. This powerpack is UL Listed for Interconnection of Power Sources in accordance with the National Electric Code.
- Refer to occupancy sensor data sheet to determine maximum number of sensors. Power pack mA output is 225mA.
WARNING: TURN THE POWER OFF AT THE CIRCUIT BREAKER BEFORE WIRING.
OPERATION
With the BZ-150, the load can be turned ON and OFF automatically using an
occupancy sensor input, a timer, panel or BAS input, and manually from an
optional low voltage momentary switch. Use the Mode Switch to select either
the Auto ON mode, or the Manual ON mode. Remove power from the BZ-150 when
changing the switch setting, or cycle power to it after changing the setting.
Auto ON (Mode Switch LEFT – default)
The occupancy sensor input, Hold ON input and the optional momentary switch
input can all be used turn ON the load. When the load is turned OFF using the
momentary switch, the BZ-150 does not turn it ON automatically until after the
sensor time delay expires (e.g., as might be required for a presentation).
Pressing the momentary switch before the sensor time delay expires turns ON
the load.
When the occupancy sensor’s time delay expires, the BZ-150 reverts to Auto ON
mode and it turns ON the load with the next input from the occupancy sensor.
Manual ON (Mode Switch RIGHT)
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 ON the load.
LOW VOLTAGE INPUTS
Four +12-24VDC 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.
Maintained Inputs:
Control ON (Blue) – This input is intended for occupancy sensor input.
Applying 12-24VDC closes the relay. Remove the voltage and the relay opens if
no other input is holding it closed.
Hold ON (Orange) – This input is intended for timer or panel input. Applying
12-24VDC closes the relay. Remove the voltage and the relay opens if no other
input is holding it closed. It overrides Control ON input.
Hold OFF (Brown) – This input is used for timer, panel, BAS or load shed
input. Applying 12-24VDC opens the relay. Remove the voltage and the relay can
accept any other input. It overrides Control ON and Hold ON inputs.
Momentary Input:
Manual ON/OFF (Grey) – This input is for a low voltage momentary switch.
Applying 12-24VDC momentary input changes the relay to the opposite state. It
overrides Control ON, Hold ON and Hold OFF inputs.
PRIORITY FOR THE CONTROL WIRES
The priority of the four control wires is as follows: Gray ⇒ Brown ⇒ Orange ⇒ Blue
- Gray – The Manual On/Off wire has the highest priority. A momentary closure will always turn the relay On and Off and override other wired inputs.
- Brown – Hold Off will override Hold On and will open the BZ-150 relay and force the lights Off. The lights stay Off as long as the switch is maintained.
- Orange – Hold On will turn a light On if it was Off and override a motion sensor and keep the light On as long as the contact is maintained.
- Blue – Sensor Control input is a maintained contact with the lowest priority.
If a sensor is occupied and the BZ-150 relay is closed the Brown wire (Hold- Off) will override the Blue wire (Sensor) and turn lights Off. A momentary pulse to the Grey wire (Momentary) will toggle the relay from On to Off and turn out the lights.
If the lights are already Off and the BZ-150 relay is open, then a maintained voltage to the Orange wire will force the lights On but not override a Hold- Off command. A momentary pulse to the Grey wire (Momentary) will toggle the relay from open to closed and turn the lights On.
BI-LEVEL CONTROL WITH MANUAL ON
The diagram to the right shows how to configure BZ-150s to provide bi-level
lighting control with both Automatic ON and Manual ON features.
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.
Over Current Protection
The BZ-150 contains built-in short circuit and thermal protection circuitry
that shuts down the +24VDC output (low voltage red wire) to prevent permanent
damage to the power pack.
Removing the excess load from the output restores the BZ-150 to proper
operation. Connect the excess load to another power pack.
LED Indicator
The LED on the reverse side of the BZ-150 indicates the following conditions:
- LED OFF: no power to the BZ-150, 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 4 or 5 seconds: the relay is closed (load ON).
- LED ON continuously: the relay is open (load OFF).
TROUBLESHOOTING
The lights came ON automatically after I deliberately turned them OFF for a presentation.
-
The BZ-150 is set for the Auto ON Mode and the occupancy sensor time delay expired. The BZ-150 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.
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 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 was powered (line voltage).
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.
800.879.8585
www.legrand.us/wattstopper
No. 24577 – 04/20 rev. 4
© Copyright 2020 Legrand All Rights Reserved.
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legrand BZ-150 Universal Voltage Power
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