Relay Logic Demonstrates Different Relay Wiring Configurations to Connect Relays for Different Types of Switching Applications. The NCD Relay Logic Page will Show you How to Wire Many Kinds of Relays for Motor Forward and Reverse Operation as Well as Light Switching for Standard and 3-Way Operation through Relays
4. Connect the Boiler Relay wiring. Please refer to wiring diagram O: (right). 2. Earth wireRemove the wiring plate from the Boiler Relay. 2.1 Carefully press a screwdriver into the opening until the cover comes free. 2.2 Tilt the cover upwards and remove it. 5.1 Wiring for a basic boiler (not requiring a pump overrun).
3 Heating relay normally open/call for heat 3 A resistive, 1 A inductive 4 Hot water relay normally closed/satisfied 3 A resistive, 1 A inductive 5 Hot water relay common 3 A resistive, 1 A inductive 6 Hot water relay normally open/call for heat 3 A resistive, 1 A inductive OT1 OpenTherm wire 1 42 V DC max. OT2 OpenTherm wire 2 42 V DC max.
Connect a relay of the Miniserver or Extension to the A1 input of the coupling relay. Input A2 of the coupling relay is connected to neutral. Using the relay contacts 11 and 14 the 230V signal can be switched. See the diagram below for connections.
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The square relay pinout shows how the relay socket is configured for wiring. This pinout image is only a 2-pole diagram for room on the page purposes, but you can get the picture here with this one since a 3-pole will just have 1 more set of contacts.