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MODEL 8055 MicroPLUS

®

 RF RECEIVER

Installation

Receiver Terminal Wiring

DoorKing Part Numbers

The model 8055 is a 

High Security Encrypted “Rotating Code” RF Receiver

 that is designed  

ONLY 

for use with Micro

PLUS

®

 transmitters and is 

typically installed in automatic garage door openers and vehicular gate operators. The encrypted “Rotating Code” programming in this receiver and 
the companion Micro

PLUS

®

 transmitters prevent copied transmitter codes from being used again to operate the garage door or gate. The 8055 

receiver can store up to 40 Micro

PLUS

®

 transmitter codes in its memory.

This receiver is 

NOT

 designed to be installed outdoors without being protected from the weather. An outdoor enclosure is available for the 

8055-081 receiver if required (P/N 8057-110 - Metal Outdoor Box).
Install the 8055 receiver in a location so the antenna is 

NOT surrounded by metal and is in free air as high as possible above the ground.

A longer Coax Antenna kit is available for the 8055-081 receiver if required (P/N 1514-073 - Includes antenna, mounting “L” bracket and 15 feet of 
coax cable).

120 Glasgow Avenue

Inglewood, California 90301 

U.S.A.

1 2

3

Built-In
Antenna

#1 Com 

#2 Relay

#3 Radio

   Power

12-24 V

olt

AC or DC

To Receiver Termnal #1 (Neg.)
To Receiver Termnal #3 (Pos.)

To Receiver Termnal #1
To Receiver Termnal #2
To Receiver Termnal #3

12-24 Volt Transformer

P/N 8069-080

P/N 8070-080

P/N 8071-080

From “Low Voltage Common”

From “Radio Open”

From “Circuit Board” Power

1 Butt

on

2 Butt

on

3 Butt

on

Use 

ONLY 

Micro

PLUS

®

 Transmitters

Garage Door Opener: 

To connect the 8055 

receiver directly to a typical garage door opener, 
connect terminals 1, 2 and 3 on the receiver to 
terminals 1, 2 and 3 on the garage door opener.

Typical
Garage

Door

Opener

#2 Relay:

 

Normally Open (N.O.) relay 

contacts are provided on terminals #1 and #2.
Relay is rated for 30 volts, 1 amp max.

1

2

3

To Receiver Termnal #1

To Receiver Termnal #2

To Receiver Termnal #3

Gate

Operator

Polarity Matters!

8055-080

Built-In Antenna

8055-081

Coax Antenna Kit

P/N 8055-080

1 2

3

F Connector

Coax Antenna Kit

(Included)

18” Coax Cable

#1 Com 

#2 Relay

#3 Radio

   Power

12-24 V

olt

AC or DC

Receiver T

erminal

Receiver T

erminal

P/N 8055-081

#1 & #3 Power:

 Connect 12 - 24 Volt AC or DC 

power to terminals #1 and #3.
If DC power is used (Transformer):
Terminal #1 is NEGATIVE and terminal #3 is POSITIVE. 
Use minimum 18 AWG wire to power the receiver.

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