42
ENG
“heaterSteam” +0300080EN - rel. 1.0 - 27.04.2016
8. MASTER/SLAVE SYSTEM
8.2 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 specifi cations of the KITSE08000 switch:
Number of ports 8
Installation DIN rail
Operating temperature -10-60°C (14-140°F)
Power supply 12/24/48 VDC
18-30 VAC (47-63Hz)
Current @24VDC 0.13A
Protection IP30
8.3 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 humidifi ers in the system. The unit that the signal is connected to will
automatically be identifi ed as the Master. Consequently, the Master does
not need to be especially confi gured.
Master
Slave
Slave
Fig. 8.d
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 factored into the
total production capacity, steam 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 humidifi ers in the system (or at least two units) to the
external signal or fi t them with independent probes).
8.1 Description of the Master/Slave system
To obtain steam production higher than that provided by one single unit,
several humidifi ers can be connected together in a Master/Slave system.
For example, if steam request is 160 kg/h, a Master/Slave system can be
created with two 80 kg/h heaterSteam units.
A maximum of 19 Slave units can be connected to each Master, meaning
a total of 20 humidifi ers 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 controllers via Ethernet RJ45 Category 5
cable.
Master
Slave
Fig. 8.a
If the Master/Slave system comprises three or more units (maximum 20),
a network switch is required.
Master
Slave
Slave
Fig. 8.b
The Ethernet port is available on the humidifi er’s c.pHC controller:
M2M9 M8 M1 M5 M6M12
1 1234567821132 31221212
Fig. 8.c
Note: use Ethernet CAT-5 STP cable, maximum length 100 m. To
connect the shield, use the earth connector provided on the controller.
main probe
or external signal
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