The Power supply modules convert locally available 24Vdc to a high-frequency bus that in turn powers the I/O modules and their field circuits.

The power supplies are compact, lightweight and efficient and mount directly onto the Node Services Carrier. Supply redundancy is supported by adding a second unit. Power supplies may be changed while energised in the hazardous area.

Each power supply is used with an additional filter unit which protects against damage from incoming noise on the 24V supply. The filters are certified for installation in Zone 1 and are fitted inside the field enclosure.