Chamberlain LiftMaster Professional 312HM Owner's Manual

WARNING
WARNING
To prevent possible SERIOUS INJURY or DEATH from electrocution:
• Be sure power is not connected BEFORE installing the receiver.
To prevent possible SERIOUS INJURY or DEATH from a moving
gate or garage door:
• ALWAYS keep remote controls out of reach of children. NEVER
permit children to operate, or play with remote control transmitters.
• Activate gate or door ONLY when it can be seen clearly, is properly
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adjusted, and there are no obstructions to door travel.
• ALWAYS keep gate or garage door in sight until completely closed.
NEVER permit anyone to cross path of moving gate or door.
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WARNING
PREPARATION
Set Power Supply Voltage
CAUTION
The use of 24V with the jumper in 12V position will cause permanent
damage to the receiver.
The receiver can be powered with either 24V AC/DC or with 12V
DC. The jumper must be in the 24V position for use with 24V,
and in 12V position for use with 12 VDC. The jumper must be set
to the proper voltage to avoid damage to the receiver.
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The receiver is factory set at 24V. Figure 1.
Set Security Mode
The 312HM Universal Receiver can be used with up to 15 ATTENTION
315 MHz rolling code transmitters or passwords in HIGH security
mode. Alternately, it can be used with up to 31 of any type 315
MHz transmitter in NORMAL security mode, including any
combination of rolling code, billion code, or dip switch remotes.
The jumper must be set at the HIGH position for the receiver to
operate in HIGH security mode. It must be set at NORMAL
position to operate at the NORMAL mode. Figure 2.
When changing from NORMAL to HIGH security mode, any
previous transmitter codes must be erased. Repeat Steps 2 and
3 on Side 2 to reprogram the receiver for each remote control
transmitter in use.
The receiver is factory set at HIGH.
Set Output Duration
(Commercial Applications ONLY)
WARNING
To prevent possible SERIOUS INJURY or DEATH, the use of
CONSTANT OPERATION on residential openers is PROHIBITED.
CAUTION
For commercial applications, the receiver can be set for either
constant or momentary closure on the output contacts. Use of
constant closure is prohibited on residential garage door openers
because it overrides the safety reversal devices.
With the jumper in the "M" (Momentary) position, the contacts
will close for 1/4 second regardless of the length of radio
transmission. With the jumper in "C" (Constant) position,
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the contacts will stay closed as long as the radio continues
transmitting. Figure 3.
The receiver is factory set at M.
ATTENTION
Universal Radio Control
NOTICE: To comply with FCC and or Industry Canada (IC) rules, adjustment or modifications of
this receiver and/or transmitter are prohibited, except for changing the code setting or replacing
the battery. THERE ARE NO OTHER USER SERVICEABLE PARTS.
Tested to Comply with FCC Standards FOR HOME OR OFFICE USE. Operation is subject to the
following two conditions: (1) this device may not cause harmful interference, and (2) this device
must accept any interference received, including interference that may cause undesired operation.
Jumper
Circuit Power Supply
Board
Terminals
24V POSITION
FIGURE 1
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Jumper
Security Mode
Terminals
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HIGH
SECURITY MODE
FIGURE 2
CONSTANT Jumper
OPERATION
Output
Duration
Terminals
FIGURE 3
OWNERS MANUAL
Models 312HM and 312HC
Circuit Power Supply
Board
Terminals
WARNING
WARNING
12V POSITION
Security Mode Jumper
Terminals
NORMAL
SECURITY MODE
WARNING
MOMENTARY
Jumper
OPERATION
Output
WARNING
Duration
Terminals
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Jumper