If the EXT and Economy functions have been activated from the control panel, the
system will behave as follows:
IN1
IN2
System Status
Open
Open
Pump stopped
Open
Closed
Pump stopped
Closed
Open
Pump running with set-point set by the user
Closed
Closed
Pump running with reduced set-point
6.2.2.
MODBUS and LON Bus
EVOPLUS circulators provide serial communication through an input RS-485. The
communication is realised according to MODBUS specifications.
With MODBUS it is possible to set the circulator operating parameters in remote mode
such as, for example, the desired differential pressure, the influence of temperature,
the regulating mode, etc. At the same time the circulator can provide important
information on the system status. For the electrical connections refer to Figure 6 and to
Table 3:
MODBUS Terminals
Terminal no.
A
B
Y
Table 3: RS_485 MODBUS terminals
The MODBUS communication configuration parameters are available in the advanced
menu see Par.10). EVOPLUS circulators also have the possibility of communicating on
LON bus through external interface devices.
Further information and details about the MODBUS and LON
bus interface are available and can be downloaded by
clicking
here
or by scanning the QR code below:
Description
2
Terminal not inverted (+)
1
Terminal inverted (-)
3
GND
ENGLISH
6.2.3.
Analogue Input and PWM
Figure 8 shows the wiring diagram of the external signals 0-10V and PWM. As may be
seen from the figure the 2 signals share the same terminals on the terminal board, so
they are mutually exclusive. If you want to use an analogue control signal, you will have
to set the type of signal from the menu (see par. 10).
Further information and details on the use of analogue and
PWM input are available and can be downloaded by clicking
here
or by scanning the QR code below:
6.2.4.
Outputs
17
Figure 8: Pull-out 13-pole terminal
board: 0-10V inputs and PWM
Figure 9: Pull-out 6-pole terminal
board: example of output connection