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RS485 WIRING CONFIGURATIONS
• 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
Turn Terminator Switch “ON”
for Last Device on Wire Run
“Daisy Chain”
wiring configuration
(Recommended method for superior data transmission)
“Star”
wiring configuration
• Maximum number of wire runs allowed is
7
• Maximum distance from the last RS485 device
(per wire run) to the Telephone Entry Syetem is
4000 Ft.
• Maximum number of RS485
devices present on
ALL
wire runs
is
31
.
• Use 22 AWG twisted pair shielded wire
Wire Run
Configuration #1
Configuration #2
4000 Ft Max.
4000 Ft Max.
+
–
Gnd
+
–
Gnd
