Installation Manual
Page 34 of 42
CIAS Elettronica S.r.l.
20MACIE0186 Ed. S001
SIOUX LIGHT
3.3 Sioux-Master
The Sioux-Master board communicates with the Sioux-CU using an RS485 serial channel.
It responds to polling from the Sioux-CU and transmits the electrical signal produced by the
sensor on board as well as the electrical signals produced by the sensors on board the
associated Sioux-Slaves.
For each serial connection on the Sioux-CU it is possible to connect up to 2 Sioux-Master, each
with an address different from the others.
The addresses assigned to the Sioux-Masters depends on the order in which they are connected
along the serial line and can have the values of 4, 11,18, and 25.
Sioux-Master board acquires the signals from the internal sensor plus those from the other six
boards (Sioux-Slave boards), converts them in digital format, assigns to each one a proper
address and then transmits these signals by an RS485 line to the Control Unit (CU).
Below is a description of the two connectors on the board:
Pin
Connector 1 Functions
Connector 2 Functions
1
Signal from slave 3
Signal from slave 4
2
Signal from slave 2
Signal from slave 5
3
Signal from slave 1
Signal from slave 6
4
GND
GND
5
Power Supply 13,8 Vcc
Power Supply 13,8 Vcc
6
Power Supply 13,8 Vcc
Power Supply 13,8 Vcc
7
RS485-Low Line LO
RS485-Low Line LO
8
RS485-High Line LH
RS485-High Line LH
CONNECTOR 2
CONNECTOR 1
