Alarm Jumper - Emerson FISHER FIELDVUE DLC3010 Instruction Manual

Instruction Manual
D102748X012
Figure 2‐12. Multichannel Installations
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Instrument
No. 1
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Instrument
No. 2
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E0364
Note that to provide a 4‐20 mA analog output signal, the DLC3010 must use HART polling address 0. Therefore, if a
multichannel installation is used with all transmitters in 4‐20 mA output mode, some means must be provided to
isolate an individual transmitter for configuration or diagnostic purposes. A multichannel installation is most useful if
the instruments are also in multi‐drop mode and all signaling is done by digital polling.

Alarm Jumper

Each digital level controller continuously monitors its own performance during normal operation. This automatic
diagnostic routine is a timed series of checks repeated continuously. If diagnostics detect a failure in the electronics,
the instrument drives its output to either below 3.70 mA or above 22.5 mA, depending on the position (HI/LO) of the
alarm jumper.
An alarm condition occurs when the digital level controller self‐diagnostics detect an error that would render the
process variable measurement inaccurate, incorrect, or undefined, while a HiHi or LoLo PV monitor is enabled. At this
point the analog output of the unit is driven to a defined level either above or below the nominal 4‐20 mA range, based
on the position of the alarm jumper.
On encapsulated electronics 14B5483X042 and earlier, if the jumper is missing, the alarm is indeterminate, but usually
behaves as a FAIL LOW selection. On encapsulated electronics 14B5483X052 and later, the behavior will default to
FAIL HIGH when the jumper is missing.
Alarm Jumper Locations
Without a meter installed
The alarm jumper is located on the front side of the electronics module on the electronics side of the digital level
controller housing, and is labeled FAIL MODE.
With a meter installed
The alarm jumper is located on the LCD faceplate on the electronics module side of the digital level controller housing,
and is labeled FAIL MODE.
R
Lead
R
Lead
Device No. 1
R
Lead
R
Lead
Device No. 2
230 and 600 W
if no Load Resistor
Readout
Battery
Backup
Readout
To Additional
Between
Instruments
DLC3010 Digital Level Controller
Installation
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DC Power
Supply
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May 2018
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