Rs485 Wiring Configurations - Chamberlain Icon26 series Owner's Manual

RS485 WIRING CONFIGURATIONS

Configuration #1
• 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
Gnd
+
–
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
• Maximum number of wire runs allowed is
• Maximum distance from the last RS485 device
(per wire run) to the Telephone Entry Syetem is
4000 Ft.
Turn Terminator Switch "ON"
for Last Device on Wire Run
• Maximum number of RS485
devices present on ALL wire runs
is 31.
• Use 22 AWG twisted pair shielded wire
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).
"Daisy Chain"
(Recommended method for superior data transmission)
4000 Ft Max.
"Star"
wiring configuration
7
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
Icon Page
18
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