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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 plenum-
approved 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 high-
impedance 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
.
