Pentax IPFC 109, Operating Manual

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8.2 COMBO function
In the “Control parameters” menu it is possible to enable the COMBO function that allows serial communication between up
to 8 IPFCs, each one connected to a pump. The operating principle (switch on/off) of pumps is similar to as stated in chapter
8.1.
To achieve the COMBO function in a system consisting of several interconnected IPFCs, use a pressure sensor connected to
each IPFC. The value of the set pressure is communicated to the slaves via the serial port.
As a further help, you can connect another two DOL pumps to the IPFC Master to cover additional water demand; they will
be operated only when all the COMBO pumps are already in
operation.
RS485 serial connection
IPFC’s communication is made through a private protocol using the RS485 port. Each IPFC must be connected to each other
by using a tripolar cable (0,5 mm
2
) wired on S+,S-,G pins on control board.
MASTER: address 00 SLAVE 1: address 01 SLAVE 2: address 02
digital
output
Motor
Max 240 VAC, 5 A
Max 30 VDC, 5A
MANUAL
OFF
AUTO
External
switch
Contactor
3
~