System Sensor B501BH - Manual (Page 3)

D650-03-00 3 I56-491-06R
Figure 4. Wiring diagram:
Horn Grouping
UL has approved horn grouping for up to six B501BH 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 units in the group to sound. Grouping
is accomplished by wiring the grouped devices together
using terminal 5, Sounder Base Interconnect, as shown in
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 COMPATIBLE
CONTROL PANEL
EXTERNAL
24V SUPPLY
CLASS A OPTIONAL WIRING
CLASS A OPTIONAL WIRING
A78-1990-01
* GROUPING OF UP TO 6 MODEL B501BHT TEMPORAL TONE SOUNDER BASES.
OPTIONAL SOUNDER INTERCONNECT *
Wiring Instructions
NOTE: External supply shown in normal standby configu-
ration in Figure 4.
The wiring diagram for a typical 2-wire intelligent system
is shown in Figure 4 (the monitor module is supervising
the external supply).
Testing
NOTE: Before testing, notify the proper authorities that
the smoke sensor system is undergoing mainte-
nance and, therefore, will be temporarily out of
service. Disable the system undergoing mainte-
nance to prevent unwanted alarms.
Sensors and bases must be tested after installation and as
an integral part of periodic maintenance. Test the B501BH
as follows:
1. Reverse the polarity of the external 24VDC supply. All
B501BH bases on the loop should sound in approximate-
ly 10 seconds.
2. Latch the sensor LED on from the control panel. That
unit’s B501BH should sound in approximately 10 seconds.
NOTES:
1. There is approximately a 10 second delay built into the
B501BH 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 4 seconds. Therefore, it is nec-
essary to complete testing of each sensor within this 4-
second limit to prevent the horn from sounding.
the diagram. Since the grouping is not supervised, the
groups can only be used for supplementary signaling.
NOTE: Grouping horns together can only be used as a sup-
plementary evacuation system. It is not acceptable to group
horns for primary alarm signaling.