Manual of SR288 intelligent controller
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3.2 Wiring connection
According to the way of installation, wire can be connected from hole A on the bottom plate
or from hole B, using a suitable tool (like knife) to cut the plastic of A.
Note:
wires must be fastened by fixing clamps on the position C.
3.3 Terminal connection
Note:
before opening the housing! Always disconnect the controller from power
supply and obey the local electrical supply regulation.
Input ports
T1: PT1000 temperature sensor, for measuring the temperature of collector and thermal
energy calculation.
T2 ~T6: NTC10K, B=3950 temperature sensor, for measuring temperature of tank and
pipe.
Communication port 485(selectable) : ELA485, for remote control communication
(WIFI model should be purchased seperetely, detailed see annexed part)
HK-A, HK-B: Dry connection on/off signal ports, (HK and HR simultaneously open or
close, for boiler heating control)
PWM1, PWM2: Signal ports for high efficiency pump, detailed connection see below
VFS: For Grundfos flowmeter sensor
FRT: For rotary vane type electronic flowmeter