Tech Controllers ST-280 User Manual page 6

ST – 280 user's manual
Scheme of connections – Wire Connection:
The ST-280 room regulator, along with the main controller, should be connected with a four-wired cable
according to the scheme below:
The four-wired cable is connected to the regulator inputs in accordance with colours of wires. The cable
is then connected to RJ12 connector which you should plug into the regulator power supply – the place
of connection is marked on the scheme as point 2 (there is additional description on the power supply).
The regulator power supply should be connected to the controller on the boiler by means of a 4-wired
cable connected on both sides to the RJ12 connector – marked on the connection scheme as point 1.
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