Eaton MTL 5553 Isolator power supply

The MTL5553 has been specifically developed to extend
31.25kbit/s (H1) fieldbus networks into hazardous areas. It provides
power and communication to devices powered through the signal
conductors. For installations in which the safe-area bus length is
small an internal terminator can be enabled by a switch on top of
the module.
The MTL5553 complies with requirements of Fieldbus
Foundation™ specified power supply Type 133† (IS power supply).