Emerson Rosemount 848T, Reference Manual, Page: 65 / 136

Reference Manual
00809-0100-4697, Rev GA
Appendix A: Reference Data
November 2014
57
Reference Data
Appendix A Reference Data
Functional specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 57
Physical specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 58
Performance specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 60
Function blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 59
Dimensional drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 64
Ordering information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page 67
A.1 Functional specifications
A.1.1 Inputs
Eight independently configurable channels including combinations of 2- and 3-wire RTDs,
thermocouples, mV, 2- and 3-wire and ohm inputs.
4–20 mA inputs using optional connector(s).
A.1.2 Outputs
Manchester-encoded digital signal that conforms to IEC 61158 and ISA 50.02.
A.1.3 Status

600 Vdc channel to channel isolation
(1)

10 Vdc channel to channel isolation for all operating conditions with maximum 150 m.
(500 ft) of sensor lead length 18 AWG.
A.1.4 Ambient temperature limits
–40 to 185 °F (–40 to 85 °C)
A.1.5 Isolation
Isolation between all sensor channels is rated to 10Vdc over all operating conditions. No
damage will occur to the device with up to 600 Vdc between any sensor channel.
A.1.6 Power supply
Powered over F
OUNDATION
™
fieldbus with standard fieldbus power supplies. The transmitter
operates between 9.0 and 32.0 V dc, 22 mA maximum (transmitter power terminals are rated
to 42.4 V dc).
A.1.7 Transient protection
The transient protector (option code T1) helps to prevent damage to the transmitter from
transients induced on the loop wiring by lightning, welding, heavy electrical equipment, or
switch gears. This option is installed at the factory for the Rosemount 848T and is not intended
for field installation.
(1) Reference conditions are -40 to 60 °C (-40 to 140 °F) with 30 m. (100 ft) of sensor lead length 18 AWG wire.