Emerson manual Surges/Transients, Grounding, Switches, Rosemount 848L, Reference Manual

Reference Manual

00809-0100-4696, Rev AA September 2004

Rosemount 848L

Figure 2-4. “Bus” location on the

Rosemount 848L

		848/848L/848L 19 AA.EPS
	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
		NOT USED
		SECURITY
		SIMULATE ENABLE
		848/848L/848L_17_AA.EPS

2-5