Page
10
Rev. 4.2 4/10/2020
Copyright © 2019 by Cool Air Incorporated. All rights reserved.
Power for the LBW-50 must be a nominal 100 to 240 Volts AC,
50/60 Hz, 16 VAC, or 24 VDC. The 100 to 240 Volts AC power is
connected to the AC to DC converter mounted on the back panel of
the enclosure. The 16 VAC or 24 VDC power is connected directly
to the “Power” terminals on the upper left-hand corner of the front
panel mounted circuit board. A safety ground terminal is also
provided on the back panel.
R
R
e
e
l
l
a
a
y
y
s
s
The detector has three miniature printed circuit board relays: The
Alarm, Pre-Alarm (Early Warning), and the Auxiliary relays. The
Auxiliary relay operates at the same time as the Alarm relay. In the
normal operating mode, the relays are energized in a normally-open
state. If a loss of power to the detector occurs, the relays will de-
energize and the alarms, if connected, will activate.
R
R
e
e
l
l
a
a
y
y
S
S
t
t
a
a
t
t
u
u
s
s
L
L
E
E
D
D
’
’
s
s
Each relay has a surface-mounted LED associated with it that
indicates the status of the relay. A relay is energized (a non-alarm
condition) when its LED is lighted (green), and de-energized (an
alarm condition) when the LED is not lit.
E
E
x
x
t
t
e
e
r
r
n
n
a
a
l
l
C
C
o
o
n
n
n
n
e
e
c
c
t
t
i
i
o
o
n
n
s
s
Contacts for external connections:
•
Auxiliary Relay contacts
•
Alarm Relay contacts
•
Pre-Alarm (Early Warning) Relay contacts