H-S81-HS Installation & Operation Manual — P/N LS10114-000HI-E:A 2/24/2015 111Instructions for the Connection of Field Devices Installationcalculate the proper capacity of the batteries to be used. Open S1 disconnect switch, connect the redcable marked with +B to the positive pole of the batteries and the black cable marked with –B to thenegative pole of the batteries; then close S1 disconnect switch.3.11.1 Replacement of Battery FusesTo replace battery protection fuses, open the disconnect switch S1, remove the blown fuses andreplace them with two equivalent or identical ones; then close the disconnect switch S1 again.3.12 Instructions for the Connection of Field DevicesAll the interconnecting cables of field devices must be duly identified and terminated with suitableend ferrules (the end of a stranded conductor must not be consolidated with a soft soldering in theplaces where the conductor is subject to contact pressure). During wiring, make sure to keep thecables of field devices (Inputs/Outputs) and the power cables separate.3.12.1 Balanced Input CablesFor this type of signal we recommend using shielded twisted cables CEI EN 50200 2 x 1 mm 2 .3.12.2 4-20 mA Analog Input CablesFor this type of signal we recommend using shielded twisted cables CEI EN 50200 3 x 1.5 mm 2 . Inthis case, please take utmost care when selecting the conductors to avoid that the voltage drop alongthe cable may prevent the connected devices from operating.Figure 3.8 Internal BatteriesNOTES:The two batteries shall have the same Ah capacity.Do not connect the batteries in parallel to obtain higher capacity.NOTE: Batteries can power the control panel only after the primary mains voltage is supplied.
