Terminals and Internal Connections
There are 3 types of hardware available:
iSMA-B-FCU-HH with 230 V AC power supply and triac outputs;
iSMA-B-FCU-HL with 230 V AC power supply and 24 V AC triac outputs;
iSMA-B-FCU-LL with 24 V AC power supply and triac outputs.
iSMA-B-FCU-HH
The iSMA-B-FCU-HH hardware version has a high voltage power supply (230 V AC) and high voltage triac outputs (230 V AC). The triac outputs are connected directly to the main controller power supply, as presented in the diagram below. The maximum current for each triac output is 0.5 A. The maximum power consumed by the external equipment connected to 24 V terminals (L2, N2) cannot exceed 7 VA in total.
iSMA-B-FCU-HH diagram of terminals and internal connections
iSMA-B-FCU-HL
The iSMA-B-FCU-HL hardware version has a high voltage power supply (230 V AC) and low voltage triac outputs (24 V AC). The triac outputs are connected to a built-in 24 V AC transformer, as shown in the diagram below. The maximum power consumed by the external equipment connected to the triac outputs and to 24 V terminals (L2, N2) cannot exceed 7 VA in total.
iSMA-B-FCU-HL diagram of terminals and internal connections
iSMA-B-FCU-LL
The iSMA-B-FCU-LL hardware version has a low voltage power supply and triac outputs (24 V AC). The triac outputs are connected to power supply terminals. The maximum current for each of the triac outputs is 0.5 A. The maximum power used by the external equipment connected to the 24 V terminals (L2, N2) cannot exceed 7 VA in total.
iSMA-B-FCU-LL diagram of terminals and internal connections