iSMA-B-FCU Hardware User Manual
www.ismacontrolli.com
DMP242en | 1st Issue rev. 3 | 02/2022
page 10 of 53
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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.
4.3.1 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.
Figure 4. iSMA-B-FCU-HH diagram of terminals and internal connections
4.3.2 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.
