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INM MTL SUM5 Rev 7
DRAFT - 09 June 2021 DRAFT - 09 June 2021
5.2 24 or 48 VDC/ Customer Powered Inputs
5.3 Alternative Connection Method
• If the Customer is providing a signal supply voltage in the range 24/48/VDC this supply is
connected to terminal VFC (+ VIN) and (OVLO). If 24VDC or 48VDC Customer Powered
Inputs are required this must be specied at the time of order as unique alarm cards are
used for each version.
• Once the supply has been connected the signal supply voltage is internally distributed to
the signal common terminal VFC for distribution to the eld contacts. An internal 160mA
glass quick blow fuse, 5mm x 20mm, located on the Common Services Card is used to
protect the output from eld wiring errors. If external customer supply is used then a
suitable fuse should be tted
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