Optional Connections - Chamberlain LM21AFCB Owner's Manual

OPTIONAL CONNECTIONS

WALL MOUNTED REMOTE TEST / RESET SWITCH
The provided LMRT switch should be wall mounted using a single
gang junction box at approx. 4' above floor level. Connections
should be made between N/O contacts (red and yellow wires) on
the LMRT to terminals 21 and 22 in the releasing device
(Figure 9). The LMRT test / reset switch provides two functions to
the releasing device:
1) Test Function. The releasing device can be tested by turning
and holding the LMRT switch. See Testing section for
details.
2) Alarm Resetting. The LMRT can be used to reset a latched
alarm condition if the door is closed and the alarm input
has returned to the standby state (alarm is no longer
active). Reset can be accomplished by turning and releasing
the switch. Door may re-open automatically if auto-open
feature is enabled, see DIP Switch Configuration Setting
section.
NOTE: This connection is necessary if floor level resetting of the
device or Auto Opening is required.
ANNUNCIATOR
Connect annunciator (#LMHS2475ADA) to 16 (+) and 20 (–).
End-of-line resistor (LMEOLRES-2-2) must be installed as
illustrated (Figure 7). A maximum of two annunciators may be
connected. Maximum output current of the devices must not
exceed .75A dc. Route wires through the non-conductive
sleeving (provided) covering any exposed bare wires. Maximum
distance of wire run within conduit not to exceed 20' total. NOTE:
If installing two visual annunciators they must be installed on
opposite walls. If these inputs are not used, place the 2.2k
Ohm resistor from the parts kit between terminals 16 and 20.
ADDITIONAL DRY CONTACT RELAY
An additional dry contact relay is provided between 17
(Common) and 18 (N/C ) and 19 (N/O). Maximum switched
current is .15A 125Vac, 1A 24Vdc. Switching of this relay
occurs immediately upon sensing an alarm.
VOICE BOARD OPTION
The voice board provides one of two verbal warnings that the
fire door is closing. Typically, depending on the length of the
delay chosen on the release device, a warning tone will occur
prior to the message, which is approximately 10 seconds in
length (for example, a 20 second delay setting on the release
device will result in a 10 second warning tone followed by the
verbal warning message). There are two messages that may
be selected:
Message 1: Warning tone followed by the message, "Warning!
An emergency condition exists and this fire door is about to
close; please remove any obstructions from its path and stand
clear."
Message 2: Warning tone followed by the message, "Warning!
This fire door will close in 10 seconds... 5 seconds... the fire
door is now closing; please remove any obstructions from its
path and stand clear."
W I R I N G
To prevent DAMAGE to the circuit board, auxiliary limit switches
MUST be provided as dry contacts and may not be used in
conjunction with the simultaneous switching of a motor control
or ANY other voltage through the same contacts. Connections
of this type will result in immediate damage to the release
device.
The release device has an 8-position DIP Switch mounted on the
circuit board, and the switch at position #8 permits selection of
either message. In the "ON" position, Message 1 is activated; in
the "OFF" position, Message 2 is activated.
The voice board can drive up to two 70.7V speakers (Model
AVERTISSEMENT
LM8SP) or speaker inputs to speaker strobes (Model
LMPSTR2475ADA). Maximum delivered power is 5 watts.
A potentiometer (VR1) is mounted on the board and rotation
counterclockwise increases the volume (clockwise to decrease
volume) (Figure 8).
Figure 7
Additional
Form-C
Dry Contact
Figure 8
Volume Control
CCW for Max.
Wire to Speaker
Figure 9
NOTE: LMRT key switch must be installed within a single gang
junction box with a minimum 2" depth using appropriate 6-32
mounting screws and mounted on the same wall and within the
same room as is the release device. All wire connections must be
secured with appropriate wire nuts.
8
WARNING
CAUTION CAUTION
ATTENTION
Annunciator
.75A Maximum Current
+ DC
During Alarm
Non-
Conductive
- DC
Sleeve
2.2k Ohm @ 1/2 watt
Supervisory Resistor
(LMEOLRES-2-2)
ADVERTENCIA
PRECAUCIÓN
LMRT
N.O.
Red
Yellow
Common