PRODUCT MANUAL - BARIX X8 - V01.05 - 10/26/2006
Connecting a Barix Barionet controller
The Barix Barionet is powered using pin 15 (Vcc) and pin 16
(Vss). In order to power the BARIX X8 connect two wires to
the Barix Barionet:
•
connect Pin 15 (J6) to Pin 4 (J
31
) of the BARIX X8 (VIN)
•
connect Pin 16 (J6) to Pin 5 (J
31
) of the BARIX X8 (VIN)
Attention: do not use a AC power supply when connecting the
BARIX X8 to Barionet ! Use a DC power supply instead !
Connecting the RS-485 bus is simple as the RS-485 signals are
available on J7 which is also 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 (J3) of the BARIX X8 (RS-485 A)
•
connect Pin 5 (J7) to Pin 3 (J3) of the BARIX X8 (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 (J3) of the BARIX X8
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 (J3)
directly at the terminals of the BARIX X8
Connecting a Barix Barionet controller · 16
RS-485 wiring
Reference wire
RS-485 termination
Power wiring