Chamberlain LM21XP - Manual (Page 7)

7
CONNECTIONS OF INITIATING DEVICES AND
ACCESSORIES
A maximum of 4 smoke detectors may be installed with this
device. Refer to NFPA 72 and NFPA 80 for instructions
concerning proper placement and detection coverage. End-of-line
devices must be installed for supervision of electrical power to
4-wire smoke detector. When using 4-wire smoke detectors with
this device, electrical supervision must be provided by means of a
UL/ULC listed end-of-line relay.
NOTE: For low voltage wiring #18 AWG is recommended.
Normally Open “2-Wire,” Class B Style A Initiating Devices
Connect wiring from N/O initiating device loop to positions 3 and
4. Place the supervisory resistor (10k ohm @ 1/2 watt) contained
within the accessory pack. (Figure 3). Observe proper polarity, 3
(+), 4 (–) when attaching to the release device’s terminal board.
NOTE: Make certain that the factory-installed jumper between
terminal positions 5 and 6 remains in place. This option is a
supervised, current-limited circuit.
OR
Normally Open “4-Wire,” Class B Style A Initiating Devices
Connect wiring from N/O 4-Wire initiating device loop to
positions 3 and 4, making sure an end-of-line supervisory
resistor (10k ohm @ 1/2 watt) is installed as shown in Figure 4
or 5, depending upon the type of smoke detector being used.
Observe proper polarity, 3 (+), 4 (–) when attaching to the release
device’s terminal board. NOTE: Make certain that the factory-
installed jumper between terminal positions 5 and 6 remains in
place. This option is a supervised, current-limited circuit.
OR
Normally Closed “4-Wire,” Class B Style A Initiating Devices
After removing the factory-installed jumper between terminal
positions 5 and 6, connect wiring from N/C 4-Wire initiating
device loop to positions 5 and 6 (Figure 6). This option is a
supervised, current-limited circuit. NOTE: Make certain that the
factory-installed resistor between positions 3 and 4 remains in
place.
NOTE: End-of-line devices must be installed adjacent and after
the last initiating device. Initiating device loops are supervised
and cannot be direct series or paralleled between multiple release
devices or shared with other alarm equipment. For proper wiring
configurations from multiple smoke detectors or signaling for
simultaneous closure on multiple doors, call technical support,
1-888-528-7870. Incorrect wiring between devices may cause
damage to the release control circuit and void warranty.
OR
Relay Module Installation as described on the following page.
W I R I N G
To prevent possible SERIOUS INJURY or DEATH:
• End-of-line devices MUST be installed for supervision of
electrical power to 4-wire smoke detector.
• DO NOT install this device on a motorized door without an
electric safety edge.
WARNING
CAUTION WARNING
WARNING
FIGURE 4
10k Ohm @1/2 watt
Supervisory Resistor
(LMEOLRES-10)
– IN/OUT + OUT + IN – IN/OUT + OUT + IN
24Vdc Power
from Terminal
Strip
3
4
NOTE: Follow this method of
attachment when using LM2W-B,
LM2WT-B, or other 2-wire 24Vdc
smoke detectors.
Power from
Control Panel
(–)
(+)
Terminal Strip
3
4
COM NO – IN/OUT + OUT + IN COM NO – IN/OUT + OUT + IN
LMEOLR1224
12/24 Vdc
EOL Relay
10k Ohm @ 1/2 watt
Supervisory Resistor
(LMEOLRES-10)
NOTE: Follow this method of attachment when using
LM4W-B, LM4WT-B, or other N/O 4-wire smoke detectors.
Purple
Power from
Control Panel
(–)
(–)
(–)
N/C
C C
N/C
(+)
(+)
(+)
LMEOLR1224
12/24 Vdc
EOL Relay
Terminal Strip
5
6
NOTE: Generic version of a N/C
4-wire smoke detector is shown.
IMPORTANT: When using 4-wire smoke detectors with this
device, the smoke detectors must be powered from a source
other than the release device, such as an approved UL 1481
regulated power supply providing battery backup support.
Power from
Control Panel
(+)
(–)
(–)
(+)
(–)
(+)
(–)
Alarm
Contacts
Style A
(N/O)
(+)
LMEOLR1224
12/24 Vdc
EOL Relay
10k Ohm @ 1/2 watt
Supervisory Resistor
(LMEOLRES-10)
NOTE: Follow this method of attachment when using
LM1424, LM1412, or other N/O 4-wire smoke detectors.
Terminal Strip
3
4
IMPORTANT: When using 4-wire smoke detectors with this device,
the smoke detectors must be powered from a source other than the
release device, such as an approved UL 1481 regulated power supply
providing battery backup support.
FIGURE 5
FIGURE 3
FIGURE 6