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15
6.1 Power supply connection
Before supplying power to the circulator, ensure that the cover of the EVOPLUS
control panel is perfectly closed.
6.2 Electrical connections of Inputs, Outputs and MODBUS
EVOPLUS circulators are equipped with digital and analogue inputs and digital outputs so
as to be able to realise interface solutions with more complex installations. For the install-
er it will be sufficient to wire up the desired input and output contacts and to configure their
functions as desired (see par. par. 8.2.1 par. 6.2.2 par. 6.2.3 and par. 6.2.4).
6.2.1 Digital Inputs
Figure 6: Pull-out terminal board for supply
Figure 7: Pull-out 13-pole terminal board: digital inputs and MODBUS
With reference to Figure 7 the digital inputs available are:
Input
Terminal no. Type of contact
Associated function
IN1
12
Clean contact EXT: If is activated from the control panel
(see par. 12 Page 11.0 of the EVOPLUS
menu) it will be possible to command the
switching on and off of the pump in re-
mote mode.
13
IN2
10
Clean contact Economy: If is activated from the control
panel (see par. 12 Page 5.0 of the EVO-
PLUS menu) it will be possible to active
the set-point reduction function in remote
mode.
11
If the EXT and Economy functions have been activated from the control panel, the sys-
tem 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 com-
munication 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.
Description
A
2
Terminal not inverted (+)
B
1
Terminal inverted (-)
Y
3
GND
Table 2: Digital inputs IN1 and IN2
Table 3: RS_485 MODBUS terminals
