Main features of D121388-3-SP
Type:This is a Slave control board.
Configuration:It is designed for single phase (SP - Single Phase) systems.
Role in the system: It is used in configurations with more than one cylinder (for example, in more powerful devices such as those for 90 kg/h, which you mentioned earlier).
D121389 is usually the Master board (main), which receives commands from the display and external sensors.
D121388 is the Slave board, which executes the commands of the Master board and controls the operation of the specific cylinder to which it is connected.
Why is the difference important? If your steam generator has only one cylinder (such as the ELMC-SB 10), it needs a Master board. However, if you have a modular system with two or three cylinders, the Master board controls the first one, and the Slave boards (D121388) control the others.
Summary of specifications:
Voltage: 230V (single phase).
Compatibility: ElectroVap ELMC and ELMC-SB series.
Version: Hardware revision "-3" (must match the version of the display and other boards in the system)