
Manual of SR258 intelligent controller
8
Output ports
FU1
:
2A/250V fuse
10A power supply Ports L, N: for power connection, L: live wire, N: zero wire,
protective wire
Output R1: Semiconductor relays (SCR), designed for pump speed cont rol, Max.
Current: 1A
Output R2: Electromagnetic relays, designed for on/off control of pump or 3 -ways
electromagnetic valve, Max. Current: 1A
Output R3: Electromagnetic relays, designed for on/off control of pump or 3 -ways
electromagnetic valve, Max. Current: 1A
Output (1500W) HR: Electromagnetic relays, designed for on/off cont rol of after
heating/thermostat function, Max. Current: 10A
1).When power supply AC230V output HR is 1500W.
2).When power supply AC110V output HR is 750W.
3.3.1 Electri cal heating 3000W version terminal ports and wring
Input ports
T1: PT1000 temperature sensor, for measuring the temperature of collector and thermal
energy calculation.
T2 ~T5: NTC10K, B=3950 temperature sensor, for measuring temperat ure of tank and
pipe.
PWM1: Signal ports for high efficiency pump, detailed connection see below
FRT: For rotary vane type electronic flowmet er.
Output ports
15A power supply Ports L, N: for power connection, L: live wire, N: zero wire,