Carel humiFog direct, User Manual

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25
ENG
"humiFog direct" +0300073EN rel. 1.0 - 31.03.2017
7. MASTER/SLAVE NETWORK OF HUMIDIFIERS
7.1 Description of the Master/Slave system
To extend humidification capacity in an individual zone, several
humidifiers can be connected together in a Master/Slave system. For
example, if humidification request is 160 kg/h, a Master/Slave system can
be created with two 80 kg/h humiFog Direct units.
A maximum of 3 Slave units can be connected to a Master, meaning a
total of 4 humidifiers in the same system.
The Master and Slave units are connected using a local Ethernet network,
and in the case of just two units (one Master and Slave) involves a direct
connection between the two unit controllers via Ethernet RJ45 Category
5 cable.
Master
Slave
Fig. 7.a
If the Master/Slave system comprises three or more units (maximum 4), a
network switch is required.
Master Slave
Slave
Fig. 7.b
The Ethernet port is available on the humidifier’s c.pHC controller:
M2 M9 M8 M1 M5 M6 M12
1 1 2 3 4 5 6 7 8 2 1 1 3 2 3 1 2 2 1 2 1 2
Fig. 7.c
Note
: use Ethernet CAT-5 STP cable, maximum length 100 m. To
connect the shield, use the earth connector provided on the controller.
7.2 Network switch for Master/Slave
connection
The Master/Slave connection of more than two units requires the use of
an industrial grade switch.
Carel markets a switch (P/N: KITSE08000) that can connect a maximum
of eight units (8 Ethernet ports). If necessary, use several KITSE08000
switches with a cascaded arrangement.
Main technical specifications of the KITSE08000 switch:
Number of ports 8
Installation DIN rail
Operating temperature -10 to 60°C (14-140°F)
Power supply 12/24/48 VDC
18-30 VAC (47-63Hz)
Current @24VDC 0.13A
Protection IP30
7.3 Type of Master/Slave system
installation
The Master/Slave system features one main unit (Master), which manages
operation of the secondary units (Slaves). The external signal or probe
connections, depending on the set control type, are made to just one of
the humidifiers in the system. The unit that the signal is connected to will
automatically be identified as the Master. Consequently, the Master does
not need to be especially configured..
Master
Slave
Slave
sonda principale
o segnale esterno
While the Master unit is powered on, the system will be able to operate
even in the event of malfunctions on the Master (alarms, stopped
production,…), as the unit’s controller will send all the required data to
the Slaves. Obviously, unless redundancy has been factored into the total
production capacity, atomised water output in this case will be lower
than requirements.
If the Master is switched off completely, the Master/Slave system will not
be able to read the control/probe signals. Consequently, it is suggested
to connect all the humidifiers in the system (or at least two units) to the
external signal or fit them with independent probes.