LiftMaster Dial Code Dial Code LC and VF Series Manual - Page 18

RS485 CONNECTION CONFIGURATIONS, Configuration #1, Daisy Chain

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RS485 CONNECTION CONFIGURATIONS Configuration #1 "Daisy Chain" wiring configuration (Recommended method for superior data transmission) • Up to 31 RS485 devices supported • Maximum distance from the last RS485 device to the Telephone Entry System is 4000 Ft. • Turn "ON" the terminator switch ONLY for the last device installed in the RS485 line. • Use 22 AWG twisted pair shielded wire Turn Terminator Switch "ON" for Last Device on Wire Run Gnd + - 4000 Ft Max. Each RS485 device must have a unique "Device ID Number" set by using the rotary switches on the device. (Refer to specific RS485 Instruction sheets). Configuration #2 Turn Terminator Switch "ON" for Last Device on Wire Run "Star" wiring configuration Turn Terminator Switch "ON" for Last Device on Wire Run - + Gnd Wire Run Turn Terminator Switch "ON" for Last Device on Wire Run 4000 Ft Max. Turn Terminator Switch "ON" for Last Device on Wire Run Turn Terminator Switch "ON" for Last Device on Wire Run Turn Terminator Switch "ON" for Last Device on Wire Run Each RS485 device must have a unique "Device ID Number" set by using the rotary switches on the device. (Refer to specific RS485 Instruction sheets). LC/VF Page 17

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RS485 CONNECTION CONFIGURATIONS
17
LC/VF Page
• Up to
31
RS485 devices supported
• Maximum distance from the last RS485 device to the Telephone Entry System is 4000 Ft.
• Turn
“ON”
the terminator switch
ONLY
for the last device installed in the RS485 line.
• Use 22 AWG twisted pair shielded wire
Each RS485 device must have a unique “Device ID Number” set by using the rotary switches on the device. (Refer to specific RS485 Instruction sheets).
Each RS485 device must have a unique “Device ID Number” set by using the rotary switches on the device. (Refer to specific RS485 Instruction sheets).
Turn Terminator Switch “ON”
for Last Device on Wire Run
Turn Terminator Switch “ON”
for Last Device on Wire Run
Turn Terminator Switch “ON”
for Last Device on Wire Run
Turn Terminator Switch “ON”
for Last Device on Wire Run
Turn Terminator Switch “ON”
for Last Device on Wire Run
Turn Terminator Switch “ON”
for Last Device on Wire Run
Turn Terminator Switch “ON”
for Last Device on Wire Run
“Daisy Chain”
wiring configuration
(Recommended method for superior data transmission)
“Star”
wiring configuration
Wire Run
Configuration #1
Configuration #2
4000 Ft Max.
4000 Ft Max.
+
–
Gnd
+
–
Gnd