BARIX R6, Product Manual, Page: 15 / 20

PRODUCT MANUAL - BARIX R6 - V01.03 - 07/20/2005
Connecting a Barix Barionet controller
The actual Barix Barionet controller features two 3pin expansion
connectors which are
NOT compatible with the 4pin expansion
connectors of the BARIX R6. This will be changed in a future
hardware revision of the Barix Barionet controller to allow for
daisy chaining. This is already supported between BARIX R6
devices and other Barionet extension devices.
However, connecting a Barix Barionet controller is simple as it
features the RS-485 signals on J7 which is a detachable screw
terminal block:
Pin 485
1 Reference GND
2 Not used
3 Not used
4 RS-485 A
5
RS-485 B
6 Reference GND
•
connect Pin 4 (J7) to Pin 2 (J1) of the BARIX R6 (RS-485 A)
•
connect Pin 5 (J7) to Pin 3 (J1) of the BARIX R6 (RS-485 B)
When communication problems occur two measures can be
taken to improve the RS-485 signal quality.
When using two separate power supplies a third wire should be
used to ensure a common voltage level :
•
Connect Pin 1 or Pin 6 (J7) to Pin 1 (J1) of the BARIX R6
When the two devices need to be connected over a long distance
both sides of the cable should be terminated using a 100 Ohm
resistor to suppress signal reflections:
•
Connect a 100 Ohm resistor between Pin 4 and Pin 5 (J7)
directly at the terminals of the Barionet controller
•
Connect a 100 Ohm resistor between Pin 2 and Pin 3 (J1)
directly at the terminals of the BARIX R6
Connecting a Barix Barionet controller • 11
RS-485 wiring
Reference wire
RS-485 termination
RS-485
troubleshooting