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Reference Manual
00809-0100-4811, Rev CA
February 2006
Rosemount 3300 Series
3-22
Power Requirements Terminals in the transmitter housing provide connections for signal cables.
The 3300 transmitter is loop-powered and operates with power supplies
ranging from 11 to 42 VDC. For Intrinsically Safe output the supply voltage
must be within 11 to 30 VDC. For Explosion-proof/Flame-proof the supply
voltage must be within 16 to 42 VDC.
Maximum Loop
Resistance
The maximum current loop resistance can be gained from the following
diagrams:
Figure 3-12. Explosion-proof
/Flame-proof installations
Figure 3-13. Non-hazardous
installations
Figure 3-14. Intrinsically Safe
installations
MAX_LOAD_EX
NOTE
This diagram is only valid if the
load resistance is at the + side,
otherwise the maximum load
resistance is limited to 300 Ohm.
MAX_LOAD_NON_INTIRNSIC
MAX_LOAD_INTIRNSIC