Power Requirements; Maximum Loop Resistance - Emerson Rosemount 3300 Series Reference Manual

Rosemount 3300 Series

Power Requirements

Maximum Loop
Resistance
Figure 3-12. Explosion-proof
/Flame-proof installations
Figure 3-13. Non-hazardous
installations
Figure 3-14. Intrinsically Safe
installations
3-22
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.
The maximum current loop resistance can be gained from the following
diagrams:
Reference Manual
00809-0100-4811, Rev CA
NOTE
This diagram is only valid if the
load resistance is at the + side,
otherwise the maximum load
resistance is limited to 300 Ohm.
February 2006