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Product description:

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).

SPECIFICATION

See also common specification

Location of fieldbus device(s):

Zone 0, IIC, T4–6 hazardous area if suitably certified

Hazardous-area fieldbus power supply:

18.4V ± 2%

105Ω ±3% dc impedance

80mA maximum current

Maximum cable length:

Determined by IS requirements, depending on other devices

attached and maximum acceptable voltage drop along cable

Digital signal transmission:

Compatible with 31.25kbit/s fieldbus systems and complies

with fieldbus standards†

Supply voltage:

20 to 35Vdc

LED indicator

Green: one provided for power indication

Power requirement, Vs, with 80mA output load:

135mA typical at 24V

105mA at 35V

Power dissipation within unit, with 80mA output load:

2.3W typical at 24V

2.6W maximum at 35V