Quick Start Instruction E5CC OMRON 1.1.2 Connecting control output Relay output If a controller with a relay as control output is used, then this relay will be energized if there is a heating demand (or cooling in a cooling installation). The relay can switch a maximum of 3 amps; if more current is demanded, a more powerful relay must be switched. You may also choose to use a controller with solid-state control output in combination with a solid-state relay with the correct power. See Figure 4 for connection diagram. Solid-State Relay Solid-state relays are extremely suitable for frequent switching of high capacities and PID controls.
The solid-state relay is controlled with a voltage of 12 Volts. This voltage is delivered by the controller. So the solid-state relay can be connected directly to the controller. Please note the polarity See Figure 5 for connection diagram. Omron has a comprehensive package of solid-state relays 4-20mA Some processes need to be controlled by a 4-20mA signal. In this case, you also need a controller with this type of control output. Figure 3: Several control outputs. 7