SRC technical documentation (IOM SRC 01 1GB)

RS485+ RS485-
GND
RS485+ RS485-
GND
MB2
RS485+ RS485-
GND
RS485+ RS485-
GND
MB2
RS485+ RS485-
GND
RS485+ RS485-
GND
MB2
T5
A+
B-
REF
RS485
T5
A+
B-
REF
RS485
AB
GND
Max. number of slaves: 31
SRC communication board
SLAVE 5 SLAVE 4 SLAVE 3
SLAVE 2SLAVE 1
MASTER
Information
The transmission is congured in 9600 baud, without parity, with 8 data bits and 1 stop bit.
7SRC
Bus topology Star topology Trunk and branch topology
Prohibited Prohibited Prohibited
Ring topology
Linear topology
Prohibited Authorized
3.3. WIRING
The interconnection wires must be a screened twisted pair. The wire impedance shall be between 100 and
130 ohms, and its cross-sectional area between 0.12 and 0.3 mm
2
(26 to 22 AWG).
Each network is limited to 31 units and a distance of 1,000 meters. However, we recommend using a
repeater well before reaching the limits and in accordance with the geographical constraints.
3.3.1. NETWORK PRINCIPLE