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Reference Manual
00809-0100-4696, Rev AA
September 2004
2-5
Rosemount 848L
Figure 2-4. “Bus” location on the
Rosemount 848L
Input/Output Power:
The discrete I/O requires a 9-32VDC power supply that is separate from the
fieldbus power. The voltage level will depend on the type of sensors being
used and outputs being driven. To power the I/O:
1. Connect the positive lead from the power supply to the (+) terminal
marked "PWR".
2. Connect the return lead to the (-) terminal marked "PWR"
3. Tighten the terminal screws to ensure adequate contact.
Surges/Transients The transmitter will withstand electrical transients encountered through static
discharges or induced switching transients. However, a transient protection
option (option code T1) is available to protect the 848L against high-energy
transients. The device must be properly grounded using the ground terminal.
GROUNDING Although not required, a ground terminal is provided that can be connected to
earth ground for optimal EMC performance. A wire of 14AWG or larger is
recommend using appropriate terminal connectors at both ends.
Transmitter Enclosure (optional)
Ground the transmitter in accordance with local electrical requirements.
SWITCHES
Figure 2-5. Switch Location on
the Rosemount 848L
848/848L/848L_19_AA.EPS
NOT USED
SECURITY
SIMULATE ENABLE
848/848L/848L_17_AA.EPS