Model C2462A OT LPD0 pages

OMNITERM LPI & LPD Loop Powered Isolators
Model C2063B LPI (single) & C2462A LPD (dual) 4-20mA Loop Powered Isolators

DATASHEET

Features
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Isolate any instrument current loop to 1500Vac
Powered by the current loop - no power supply required
Lowest volt drop <3 Volts at 20 mA (2,5V Typical)
Load independent – no field calibration ever required
High 1kohm load capability
High 0.1% Accuracy
High 11.25mm per channel packing density
Reverse polarity and overload protection
Unique internal clamp can protect against open circuit.
Internal 250 ohm resistor for 1-5V input to PLC’s etc.
Easy DIN rail or surface mounting

The OMNITERM LPI and LPD are loop powered isolating current
repeaters specifically designed to isolate instrument current loops from
circulating ground currents that can cause system inaccuracies, or at
worst, instrument failure. Insert in any 4-20mA current loop to isolate
the instruments in the loop. The current applied to the input is repeated
on the isolated output, and the load present on the output is reflected
back to the input. No separate power source is required.
Forming part of OMNIFLEX’s extensive OMNITERM range of signal
conditioning and signal isolation products, the OMNITERM LPI and LPD
are designed to be DIN rail or surface mounted.
The Omniterm LPI is a single loop isolator in a 22.5mm wide DIN rail
mount housing with extensive additional connection features, while the
LPD is a dual loop isolator that fits two separate channels into the same
22.5mm width for high density applications.
These second-generation products utilise advanced electronic
techniques to achieve high accuracy with minimum loop losses and
zero field calibration.

Because of the faithful nature in which the output impedance is
reflected back to the input, an open circuit on the output will cause an
open circuit on the input. In cases where this is undesirable, an internal
clamp is provided in the LPI model which, when connected, ensures
that the current loop is not broken if the load is disconnected, such as
unplugging the input terminations of a PLC or RTU.
In many applications there is a need to convert the 4-20mA into 15Volts for an RTU, PLC or DCS etc. This is normally inconvenient
because the precision resistor needs to be sourced, mounted and wired
independently without causing loop errors. To overcome this obstacle,
the LPI version also includes a precision 250ohm resistor that can be
connected into the circuit to convert the output into 1-5V within the
module.
The LPI and LPD operate over 0-50mA range, allowing fault current
levels to be repeated.

Applications
Isolate instruments in the same current loop

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Prevent ground loops and eliminate loop errors

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Isolate RTU’s, PLC’s, SCADA I/O from the field loop.

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Isolate two-wire transmitter loops from local 24Volts

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Isolate grounded chart recorders from the field loop

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Isolate grounded control valves from the transmitter

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Can be used with two-wire or four-wire transmitters

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Isolate and convert two wire field devices to 1-5V

22.5

110

75

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Mechanical Details

Copyright Omniflex ♦ Subject to change without notice

Datasheet DSC2063BR06 sheet 1 of 12

http://www.omniflex.com

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