Keypad #1
Keypad #2
Keypad #3
Keypad #4
Keypad #8
Keypad #7
Keypad #6
Keypad #5
RS-485 HUB #1
RS-485 HUB #2
Keypad #16
Keypad #15
Keypad #14
Keypad #13
Keypad #9
Keypad #10
Keypad #11
Keypad #12
To RS-485 HUB #3
Catagory-5
Cable
+12v
GND
B+
A-
STARGATE
RS-485 Connector
6
CONNECTION USING RS-485 HUB AND HOME-RUN (STAR) WIRING
An optional RS-485 Hub can be used to allow home-run (star format) wiring of keypads to Stargate. The RS-485 Hub can accom-
modate up to 8 RS-485 devices (keypads, thermostats, etc.). Additional hubs can be connected to accommodate up to 32 devices.
NOTE: Each hub requires an external 12vdc @ 1A power supply. DO NOT power a hub from Stargate's 12v power
source. When connecting two or more hubs, the RS-485 inputs and ground connection of each hub should be connected in a "daisy-
chain" configuration (see diagram). Catagory-5 twisted-pair cable is recommended for all RS-485 connections. Total cable length
should not exceed 4,000 feet.
B+
A-
+12vdc
Ground
12vdc
@1A
Power
Supply
12vdc
@1A
Power
Supply
B+
A-
+12vdc
Ground
