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Reference Manual
00809-0100-4697, Rev EA
October 2011
Rosemount 848T
www.rosemount.com
Appendix A Reference Data
Functional Specifications . . . . . . . . . . . . . . . . . . . . . . . . . page A-1
Physical Specifications . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-3
Performance Specifications . . . . . . . . . . . . . . . . . . . . . . . page A-4
Function Blocks . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-4
Dimensional Drawings . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-8
Ordering Information . . . . . . . . . . . . . . . . . . . . . . . . . . . . . page A-12
FUNCTIONAL
SPECIFICATIONS
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).
Outputs
Manchester-encoded digital signal that conforms to IEC 61158 and ISA 50.02.
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.
Ambient Temperature Limits
–40 to 185 °F (–40 to 85 °C)
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.
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.)
(1) Reference conditions are -40 to 60 °C (-40 to 140 °F) with 30 m. (100 ft) of sensor lead
length 18 AWG wire.