D250-04-00
2
I56-2813-002R
circuit wires should be twisted pair or shielded cable installed
in separate grounded conduit to protect the communication
loop from electrical interference.
Make wire connections by stripping about
3
⁄
8
˝ of insulation
from the end of the wire. Then, slide the bare end of the wire
under the clamping plate, and tighten the clamping plate
screw. Do NOT loop the wire under the clamping plate (See
Figure 3
).
The zone wiring of the sensor base should be checked before
the sensor heads are installed. Check the wiring for continuity
and polarity in the base.
See the individual sensor manual for the maximum sensor in-
stallation temperature.
Wiring Instructions
NOTE: External supply shown in normal standby configura-
tion in
Figure 4
and
5
.
The wiring diagram for a typical 2-wire intelligent system is
shown in
Figure 4
and
5
. (the monitor module is supervising
the external supply).
Testing
Sensors and bases must be tested after installation and as
an integral part of periodic maintenance. Test the B501BH-2
as follows:
NOTE:
Before testing, notify the proper authorities that the
smoke sensor system is undergoing maintenance and, there-
fore, will be temporarily out of service. Disable the system un-
dergoing maintenance to prevent unwanted alarms.
1. If configured as in
Figure 4
and
5
, reverse the polarity
of the external 24VDC supply. If configured as in
Fig-
ure 5
, turn on the Intelligent Relay Module. All B501BH-
2 bases on the loop should sound in approximately 0.75
to 5.7 seconds.
2. Latch the sensor LED on from the control panel. That
unit’s B501BH-2 should sound in approximately 0.75 to
5.7 seconds.
NOTES:
1. There is approximately a 0.75 to 5.7 second delay built
into the B501BH-2 before sounding. This delay is present
whether the control signal comes from the sensor or from
the external power supply polarity being reversed.
2. During automatic testing cycles, the horn may sound if
the associated sensor is left in the test mode with LEDs
latched on for more than 0.75 seconds. Therefore, it is
necessary to complete testing of each sensor within this
0.75-second limit to prevent the horn from sounding.
Figure 1. Terminal layout:
5
4
3
2
1
Figure 2. Mounting:
MOUNT B501BH-2
TO ELECTRICAL BOX
4 INCH SQUARE BOX
C0889-00
D250-04-00
3
I56-2813-002R
THIS
NOT THIS
Figure 3:
Figure 4. Wiring diagram:
Detector Activates Sounder Base(s) - (Complies with UL268)
UL has approved horn grouping for up to six B501BH-2 base
with horn units. When wired as a group, any detector in the
group that has its LED’s latched on by the panel will cause
other B501BH-2 units in the group to sound. This type of “local”
grouping is accomplished by wiring the grouped devices to-
INTELLIGENT
MONITOR
MODULE
(+) 2
(–) 1 6
7
U.L.
LISTED
EOL
RESISTOR
47K
U.L.
LISTED
EOL
RELAY
24V
5
4
1
2
3
5
4
1
2
3
5
4
1
2
3
(+) COMM.
(–) COMM.
(–) POWER
(+) POWER
U.L. LISTED COMP
AT
IBLE
CONTROL
P
ANEL
EXTERNAL 24V SUPPL
Y
CLASS A OPTIONAL WIRING
CLASS A OPTIONAL WIRING
*
GROUPING OF UP TO 6 MODEL B501BH-2 SOUNDER BASES.
OPTIONAL SOUNDER INTERCONNECT
*
gether using terminal 5, Sounder Base Interconnect, as shown in
the diagram.
NOTE:
Since a local grouping of horns is not supervised, the
groups can only be used as a supplementary evacuation system.
It is not acceptable to group horns for primary alarm signaling.
C0737-00
C0736-00
C0969-00
UL LISTED
COMPATIBLE
CONTROL
PANEL
INTELLIGENT
MONITOR
MODULE
INTELLIGENT
RELAY
MODULE
FIRST
SOUNDER
BASE
(+) POWER
(–) POWER
LAST
SOUNDER
BASE
(–) COMM.
(+) COMM.
UL
LISTED
EOL
RELAY
24V
UL LISTED
EOL
RESISTOR
47k
UL LISTED
24V SUPPLY
SLC
(+)
(–)
THIS IS A STANDARD RELAY
MODULE CONFIGURED TO
REVERSE THE POWER
OPTIONAL SOUNDER INTERCONNECT
*
*
GROUPING OF UP TO 6 MODEL B501BH-2 SOUNDER BASES.
†
†
Figure 5. Wiring diagram:
Detector Activates Sounder Base(s); Intelligent Relay Module Ac-
tivates All Sounder Bases - (Complies with UL 268 and UL 464)
UL has approved grouping of up to six B501BH-2 bases with
horn units. When wired as a group, any detector in the group
that has its LED’s latched on by the panel will cause other
B501BH-2 units in the group to sound. This type of “local”
C0970-00
grouping is accomplished by wiring the grouped devices to-
gether using terminal 5, Sounder Base Interconnect, as shown
in the diagram.
NOTE:
Since a local grouping of horns is not supervised, the
groups can only be used as a supplementary evacuation sys-
tem. It is not acceptable to group horns for primary alarm
signaling.
