Modbus And Lon Bus; Analogue Input And Pwm; Figure 7: Pull-Out 13-Pole Terminal Board: 0-10V Inputs And Pwm; Table 4: Rs_485 Modbus Terminals - DAB EVOPLUS B 120/220.32 M Installationsanweisung Und Wartung

8.2.2

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 4:
The MODBUS communication configuration parameters are available in the advanced menu see Par.12).
EVOPLUS circulators also have the possibility of communicating on LON bus through external interface
devices.
Further information and details on the MODBUS and LON bus interface are available at the following link:
8.2.3

Analogue Input and PWM

Figure 7: Pull-out 13-pole terminal board: 0-10V inputs and PWM

Figure 7 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. 12 Page 7.0).
Further information and details on the use of the analogue and PWM input are available at the following link:
MODBUS Terminal no.
Terminals
A
B
Y

Table 4: RS_485 MODBUS terminals

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ENGLISH
Description
2 Terminal not inverted (+)
1 Terminal inverted (-)
3 GND
34