Model C2474A OMNITERM LZI0 pages

OMNITERM LZI & LZD Current Loop Interface
Model C2474A LZI (Single) & C2475A LZD (Dual) with Surge Suppression.

DATASHEET

• Field Interface for 2 or 4-wire transmitters
• 10-30Vdc supply suits battery operation
• Provides 24Vdc power to 2 wire transmitters
• Includes 10kA Surge Protection.
• Includes Signal Isolation.
• Includes optional 250 ohm termination.
• Very low power suits battery applications
FEATURES
•

Fully surge protected inputs

•

Wide operating temperature range

•

1500Vac Isolation Input/Output

•

DIN Rail or surface mountable

•

IEC61508 SIL1 Compliant

•

Narrow 22.5mm module width

•

No Field Calibration necessary

•

CE Mark Compliant

OVERVIEW
The OMNITERM LZI and LZD are current loop interface modules
designed to interface field mounted transmitters in remote applications
where signal isolation and surge protection is required Applications
include interfacing for RTU’s, PLC’s etc.
The LZI is a single channel device with additional flexibility and support
for both 2-wire and 4-wire 4-20mA transmitters. The LZD is a dual
channel device for increased packing density, suitable for multiple 2wire transmitters.
The Omniterm LZI and LZD both include the following features:
•

A fully specified 10kA surge arrestor to prevent electrical surges
induced on the field wiring from damaging sensitive equipment in
the panel

•

1500Vac isolation from input to output so that ground loops
cannot occur, that might otherwise affect instrument accuracy.

•

A stable 24Vdc field power supply to power two-wire transmitters
from lower voltage sources such as 12V battery systems without
compromising available loop voltage or loop resistance.

•

A precision 250 ohm resistor allowing 4-20mA to be converted
conveniently into 1-5V signals for RTU’s and PLC’s.

Combining the surge arrestor, isolator and 250 ohm termination into a
single module, saves significant cost, engineering time and panel
space in monitoring applications.
Reliability figures in accordance with IEC61508 (SIL1) are available to
allow inclusion of these devices in safety systems.
These modules utilise advanced electronic techniques to achieve high
accuracy and low power consumption with zero field calibration, saving
you installation and commissioning time.
Forming part of OMNIFLEX’s extensive OMNITERM range of industrial
instrumentation, the OMNITERM LZI and LZD are designed to be DIN
rail or surface mounted and are a space-saving 22.5mm wide.
See the companion Omniterm LZB datasheet for dual binary inputs
with surge protection.

Mechanical Details
110

75

22.5

Copyright Omniflex ♦ Subject to change without notice

Datasheet DSC2474A Revision 06 sheet 1 of 6

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