DataLoop™ LI23 Loop-Powered Process Meter
Instruction Manual
4
MN302100 Rev 3
Introduction
These loop-powered 1/8 DIN digital panel meters can be installed virtually anywhere to provide conven-
ient and informative display of any 4-20 mA signal. One of the most convenient features of these instru-
ments is their dual line display which is typically used to display the process variable on the 5-digit alpha-
numeric top line and the units or a tag on the 8-digit alphanumeric bottom line. Another common setup is
to display the input in one scale on the top line (such as feet) and another scale on the bottom line (such
as gallons). Both of these lines use 14-segment, alphanumeric characters for clear indication of tags,
units or alarm messages.
Further enhancing the display on these instruments is a 20-segment bargraph that also includes a numer-
ic value of the percentage the bargraph represents.
These loop-powered meters can be installed virtually anywhere because they get their power from the 4-
20 mA loop and therefore require no separate power source. And they only drop 1.5 V (4.5 V with back-
light), so they add very little burden to the loop. Additional features that allow these instruments to be in-
stalled virtually anywhere include a NEMA 4X, IP65 front panel, an operating temperature range of -40 to
167°F (-40 to 75°C), conformally coated PCBs, and a backlit LCD that can be read in bright sunlight or
dimly lit areas.
The meter can be programmed, setup and operated via the four front panel buttons. Three of these but-
tons can be used as function keys. In addition, a digital input is standard and is particularly useful for re-
mote reset of the alarms or to trigger an alarm.
All models come equipped with two open collector outputs and are available with two solid state relays
and 4-20 mA analog output options. The open collector outputs are useful for alarm indication or pulse
output. The relays can be programmed for alarm indication, on/off control, or pump alternation.
