TYPICAL WIRING DIAGRAM WEATHERDRIVE LM550EV
Information for Service Personnel
25
OPTIONAL ACCESSORIES
1. Model 128EV 2 Channel wireless wall button
2. Model TX4UNI 4 Channel transmitter
3. Model 747EV keyless entry system
4. Model 760EV outside keyswitch
5. Model 1702EV outside quick release
6. Model 771EV IR beams
24
6
3
5
4
2
1
NOTE: Only genuine Liftmaster accessories are approved for use with this opener. Generic compatible accessories are
NOT approved for use with this opener.
NOTE: The terminal block is weather protected by a rubber grommet.
When using external wiring, the cable holes can be punched through with a small screwdriver. These
holes should be sealed with silicon sealant in order to maintain the weather proof rating.
7. Model 828EV Internet gateway, allows operating your
door opener via internet or a compatible
mobile phone.
7
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