Emerson Process Management 2051 manual Rosemount, Reference Manual, 00809-0200-4101,Rev AA July

Rosemount 2051

Reference Manual

00809-0200-4101, Rev AA July 2008

Table 5-1. Troubleshooting guide

Symptom(1)	Cause	Recommended Actions
Device does not show up on segment	Unknown	Recycle power to device
	No power to device	1.	Ensure the device is connected to the segment.
		2.	Check voltage at terminals. There should be 9–32Vdc.
		3. Check to ensure the device is drawing current. There should
		be approximately 17 mA.
	Segment problems
	Electronics failing	1.	Electronics board loose in housing.
		2.	Replace electronics.
	Incompatible network settings	Change host network parameters.
		Refer to host documentation for procedure.

Device does not stay on segment(2)

Incorrect signal levels.	1.	Check for two terminators.
Refer to host documentation for	2.	Excess cable length.
procedure.	3.	Bad Power supply or conditioner
Excess noise on segment.	1.	Check for incorrect grounding.
Refer to host documentation for	2.	Check for correct shielded wire.
procedure.	3.	Tighten wire connections.
	4.	Check for corrosion or moisture on terminals.
	5.	Check for Bad power supply.
Electronics failing	1.	Tighten electronics board.
	2.	Replace electronics.
Other	1.	Check for water in the terminal housing.

(1)The corrective actions should be done with consultation of your system integrator.

(2)Wiring and installation 31.25 kbit/s, voltage mode, wire medium application guide AG-140 available from the fieldbus Foundation.

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