Chamberlain 312HMC Quick Start Manual

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 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.
PREPARATION
SET POWER SUPPLY VOLTAGE
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 12Vdc. The jumper must
be in the 24V position for use with 24V, and in 12V position for use with 12Vdc. The
jumper must be set to the proper voltage to avoid damage to the receiver.
The receiver is factory set at 24V Figure 1.
SET SECURITY MODE
The Universal Receiver can be used with up to 15 rolling code transmitters or
passwords in HIGH security mode. Alternately, it can be used with up to 31 of any
type 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)
To prevent possible SERIOUS INJURY or DEATH, the use of CONSTANT
OPERATION on residential openers is PROHIBITED.
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, the contacts will stay closed as long as the radio continues
transmitting Figure 3.
The receiver is factory set at M.
UNIVERSAL RADIO CONTROL
MODELS 312HMC & 312HM (315 MHz)
MODELS 412HMC & 412HM (390 MHz)
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.
WARNING: This product can expose you to chemicals including
lead, which are known to the State of California to cause cancer or
birth defects or other reproductive harm. For more information go
to www.P65Warnings.ca.gov
Power Supply
Jumper
Terminals
Circuit Board
24V POSITION
Jumper
Security Mode
Terminals
HIGH
SECURITY MODE
CONSTANT
Jumper
OPERATION
Output Duration
Terminals
Power Supply
Terminals
Circuit Board
FIGURE 1
Jumper
Security Mode
Terminals
SECURITY MODE
FIGURE 2
MOMENTARY
Jumper
OPERATION
Output Duration
Terminals
FIGURE 3
Jumper
12V POSITION
NORMAL