Operation manual of solar controller SR658
Page 11 of 105
Output R4: Electromagnetic relays, designed for on/off control of pump or 3-ways
electromagnetic valve, Max. Current: 1A
Output R5: Electromagnetic relays, designed for on/off control of pump or 3-ways
electromagnetic valve, Max. Current: 1A
Output HR: Electromagnetic relays, designed for on/off control of back-up heating device,
Max. Current: 1A
R4, R5 terminals for 3-ways valve / pump connection
Valve with 3 wires
Valve with 2 wires
Pump connection
R4
～
R5: When it is for control 3 ways electromagnetic valve,
（
3 is normally close port, 2 is
normally open port ,1 is common port
）
When it is for control pump, (2 is normally open port, 1 is common port)
