Modbus Electrical Connection - AERMEC WRL Series Manual

9. MODBUS ELECTRICAL
CONNECTION
Through the door named "Field Bus"
application, WRL is able to monitor
several Modbus slave. Remember to
add at the end of a line resistance of
120 ohms between Tx + and Tx-.
J7
RX-/TX-
J8 RX+/TX+
GND
J9
J10
Vout
RX-/TX-
RX+/TX+
GND
J11
C1
NO1
- group 1
NO2
NO3
C2
NO4
- group 1
RS-485 interface for
NO5
supervising systems with
NO6
MODBUS protocol.
Accessories available
for all sizes WRL.
NO7
- group 2
C3
NC7
C4
NO8
NO9
- group 3
NO10
NO11
NO12
IWRLI2. 1810. 4900577_05
FIELD BUS
RX-/TX-
RX+/TX+
GND
-
(J10)
AER485P1:
-
J6
ALWAYS REFER TO WIRING ON UNIT
(INCLUDED).
ON 1 2 3 4
Zona 2 Zona 3
3
Addr
Zona 2
STA/H
STA/H
1
Addr
Zona 1
ON 1 2 3 4
Zona 2
4
Addr
Zona 3 Zona 3
ATTENTION:
To change the Modbus address (STA
/ H) press + FAN POWER for 3 secon-
ds. Enter the password 22 and change the
parameter "Addr".
2
Addr
5
Addr
17