Xylem ECOCIRC XL, XLplus Electronic drive - Manual (Page 6)

2.5.4 External analog input 4-20mA []
The circulator can be equipped with a 4-20mA external
differential pressure sensor, connected to terminals

and  , with the purpose of increasing the precision in
operating modes involved with pressure regulation.
For setting, in the drive, the correct pressure sensor
model used, see par. 4.3.5.3.
2.5.5 External temperature sensor []
The circulator can be equipped with an external KTY83
temperature probe (1K
Ω at 25 
C), connected to
terminals  and  , with the purpose of measuring an
absolute or a differential water temperature, in
temperature dependent / influenced operating modes.
For setting, in the drive, the desired temperature-
dependent control mode, see par. 6.1.2
2.5.6 Communication bus (standard)
[]
The circulator (model ecocirc XLplus only) 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 / 38400 / 56000 / 57600 baud
Data
format
8 data bits, no parity, 1 stop bit
Protocol
Modbus RTU (factory setting)
Bacnet MSTP
5
Address
1

247 Modbus RTU
0

127 Bacnet MSTP
5
ID #1 factory setting
For setting, in the drive, the correct communication
parameters, see par. 4.3.5.2.
NOTICE
This communication bus, implemented on terminals
 ,
  and  , is the only one which can be used for
connecting 2 pumps in dual pump operations (see par.
4.3.5.1)
2.5.7 Communication bus (optional)
[]
The circulator (model ecocirc XLplus only) can
communicate remotely through an optional RS485
port, available exclusively in case 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 / 38400 / 56000 / 57600 baud
Data
format
8 data bits, no parity, 1 stop bit
Protocol
Modbus RTU (factory setting)
Bacnet MSTP
5
Only on ecocirc XLplus terminal-connected models
Address
1

247 Modbus RTU
0

127 Bacnet MSTP
5
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, even when the standard
communication bus (described in 2.5.6) is used for
dual pump operations (in case of a twin-head pump or
2x single-head pumps)
NOTICE
Don’t use this communication bus, implemented on
terminals
 ,   and  , for connecting 2 pumps in dual
pump operations
2.5.8 Optional wireless / RS485 module
[]
The drive can be equipped with

an optional Wireless module;

an optional RS485 module
Both the modules shall be plugged inside the drive
(see
Figure 12 ), fixed by the provided clips and with
the cable connected to the connector  (see par. 6.2
and 6.3).
2.6 Settings priority
All the I/O signals, described in 2.5, can interact
together changing the behavior of the circulators they
are connected to: in particular, in case two or more
signals are enabled and active at the same time, the
circulator will operate according to the setting with the
highest priority.
Refer to the table below for the settings priority:
Priority
Possible settings
User
Interface
External
Start/Stop
External
0-10V
Bus signal
1 Stop
2 Regulation
3 Stop
4 Regulation
5 Stop
6 Regulation
7 Stop
EXAMPLE 1
In case the external start/stop switch is open or
unconnected (External Start/Stop = Stop), the drive
shall not accept any regulation.
EXAMPLE 2
The circulator can be driven through the User Interface
only if no external signals are applied (to the provided
terminals) and no communication bus is connected