Electronic Drive Manual
3
2.5.2 External analog input 0-10V [(7) (8)]
An external analog signal 0-10V, applied to terminals
(7) and (8), controls the circulator speed ranging from
0 to 100%, following a linear function as depicted in
Figure 1.
Figure 1
The table below is a description of the points shown
in Figure 1.
Speed Pump Speed Pump
V
in
setpoint status
Point
setpoint status
Point
thresholds [rpm] when [rpm] when
[V] when V
in
⇑ when V
in
⇓
V
in
⇑ V
in
⇓
0 - Input - LAST RUN -
disabled SETUP
0.8 - Input - 0 OFF (9)
disabled
1.19 - Input - 0 OFF (8)
disabled
1.20 0 OFF (1) MIN RUN (7)
1.49 0 OFF (2) MIN RUN
1.50 MIN RUN (3) MIN RUN (6)
10.0 MAX RUN (4) MAX RUN (5)
2.5.3 Fault signal [(4) (5)]
The drive controls a dry contact relay for fault signal
detection. If an error causes the pump to stop operating,
the relay contact closes and terminals (4) and (5) are
short circuited.
RATINGS
V
max
< 250VAC
I
max
< 5A (if resistive load)
I
max
< 2A (if inductive load)
2.5.4 External analog input 4-20mA [(9) (10)]
The circulator can be equipped with a 4-20mA external
differential pressure sensor, connected to terminals (9)
and (10), with the purpose of increasing the precision in
operating modes involved with pressure regulation.
For setting the correct pressure sensor model in the
drive, see sec. 4.3.5.3.
2.5.5 External temperature sensor [(13) (14)]
The circulator can be equipped with an external KTY83
temperature probe (1KΩ at 25°C), connected to ter-
minals (13) and (14), with the purpose of measuring an
absolute or a differential water temperature, in tempera-
ture dependent / inuenced operating modes.
2.5.6 Communication bus (standard)
[(15) (16) (17)]
The circulator can communicate remotely through a
built-in RS485 port, whose characteristics are:
Interface RS485 (TIA/EIA) optically isolated
Baud rate 4800 / 9600 (factory setting) / 14400 /
19200 / 138400 / 56000 / 57600 baud
Data format 8 data bits, no parity, 1 stop bit
Protocol Modbus RTU (factory setting)
BACnet MSTP
1-247 Modbus RTU
Address 0-127 Bacnet MSTP
ID #1 factory setting
For setting the correct communication parameters in the
drive, see sec. 4.3.5.2.
NOTE:
This communication bus, implemented on terminals
(15), (16) and (17), is the only one which can be used
for connecting 2 pumps in dual pump operations (see
sec. 4.3.5.1).
2.5.7 Communication bus (optional)
[(18) (19) (20)]
The circulator can communicate remotely through the
RS485 port, if the optional Wireless module or the
optional RS485 module is installed; main characteristics
of this port are:
Interface RS485 (TIA/EIA) not isolated
Baud rate 4800 / 9600 (factory setting) / 14400 /
19200 / 138400 / 56000 / 57600 baud
Data format 8 data bits, no parity, 1 stop bit
Protocol Modbus RTU (factory setting) and
BACnet MSTP
1-247 Modbus RTU
Address 0-127 BACnet MS/TP
ID #1 factory setting
The aim of this additional communication bus is to
offer a connection to an external BMS, or to a generic
external device, when the standard communication bus
(described in 2.5.6) is used for dual pump operations
(2x single-head pumps)
NOTE:
Do not use this communication bus, implemented on
terminals (18), (19) and (20), for connecting 2 pumps in
dual pump operations.
Electrical Installation
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