Alarm.Com ADC-ACC1-17 - Reader Port 1 RS-485 Wiring

ADC-ACC1-17 Installation Guide | 9
Reader Port 1: Wiring expansion modules using 2-wire RS-485
GND
DAT
CLK
ADC-ACC1-17
TR+
TR-
GND
ADC-ACX1
OR
ADC-ACX2
GND
TR-
TR+
GND
TR-
TR+
ADC-ACX1
OR
ADC-ACX2
USE TWISTED PAIR
24 AWG, 120 OHM
IMPEDANCE
CABLE WITH DRAIN AND
SHIELD WIRES. 2,000 FT.
(609 M) MAXIMUM
TOTAL LENGTH.
UP TO EIGHT TOTAL EXPANSION MODULES MAY
BE WIRED. THE LAST EXPANSION MODULE ON THE
BUS MUST HAVE JUMPER J5 INSTALLED FOR
ADCACX2 MODULES AND J4 INSTALLED FOR
ADCACX1 MODULES.
For ease of install, daisy chain expansion modules together. Wire each
expansion module to the next module instead of wiring directly back to
the controller.