2B23_15 Datasheet, PDF (1/4 Pages) Analog Devices – PROGRAMMABLE OUTPUT ISOLATED VOLTATGE TO CURRENT CONVERTER

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10
DEVICES
ProgrammablOe utput,
IsolatedVoltage-to-CurrenCtonverter
!
.
2823 I
FEATURES
FUNCTIONAL BLOCK DIAGRAM
WIde Input Renge. Resistor Programmable
"Pin Programmable Output: 4 to 20mA or 0 to 20mA
High CMV Input/Output Isolation: :i: 1500V pk
Continuous
Low Nonllneerity: :i:0.O5% mex (2B23KI
"'-,.<:
Low Span Drift: :i:0.005%rC max (2B23KI
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OBSOLETE Singla Supply Operation: +14V to +28V
Small Size: 1.8" x 2.4" x 0.6"
Meau IEEE Std. 472: Transient Protection (SWC)
Meets ISA Std. SO.1: Isolated Current Loop
Transmitters
APPUCATIONS
Industriellnstrumentation
and Proeess
Ground Loop Elimination
Transient Voltage Protection
Analog Tr
itters and ControDars
Remote Data Acquisition Systems
Control
GENERAL DESCRIPTION
The model 2B23 is . high perfonnance, low cost voltage to
current converter featuring :i:1500V pk input to output isolation
for interfacing with standard process signals. The input stage of
the 2B23 may be single resistor programmed to accept voltages
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In data acquisition and control systems, the 2B23 may act as an
isolated interface between the DIA converter output of a micro-
computer analog 1/0 and standard 4 to 2OmAor 0 to 20mA
analog loops. In prncess control sysrems, the 2823 may be used
as a current output stage of a proportional controller to interface
devices such as current-ta-position converters and current-ta-
pneumatic transducers.
within a 0 to + 10V range (+O.IV to + 10V full scale). The
isolated outpUt is pin programmable to provide current in the
range of 4 to 20mA or 0 to 20mA and can be opersted with 0 to
800n grounded or floating loads.
DESIGN FEATURES AND USER BENEFITS
High CMV Isolation: The 2B23 features high input to output
galvanic isolarion to elintinate ground loops and offer protection
against damage from. transients and fault voltages. Its isolation
The 2B23 uses reliable transformer isolation techniques and is
battier will withstand continuous CMV of :i:ISOOVpk and
available in two accuracy selections offering guaranteed non-
ISOOVrIDS@ 60Hz for 60 seconds.
linearity error (2B23K: ;t 0.05% max, 2B23J: :i:0.1% max) and
guaranteed low span drift (2B23K: :i:0.OO5%/"Cmax, 2B23J:
;to.OI%/"C max). The internally trimmed span and offset errors
arc ;to.1% for the 2B23K and :i:0.2S% for the 2B23J. Both
span and offset may be adjusted using optional external
potentiometers.
High Reliability: To assure high reliability in harsh industrial
environmentS, reliable magnetic isolation is used. The 2B23
meets the IEEE Standard for Transient Voltage Prorection (472-
1974: Surge Withstand Capability) and offets reliable operation
over - 2S"C to + 8S"C remperalUre range.
Featuring wide range, single supply operation ( + 14V to + 28V
dc), the 2823 provides isolated loop power, thus eliminating the
need for an external dc/de converter.
Versatility: The 2B23 can be easily tailored to the user's appli-
cation, accommodating a wide range of input voltages, providing
pin programmable, standard current OUtpUtSand offeriug wide
range, single supply operation.
APPUCATIONS
Model2B23 has been designed to provide high accuracy, versatility
and low cost in industrial and laborstory system applications
requiring isolated current transmission. The 2B23 meets the
requirements of the Instrument Society of America Std. SO.I
"Compatibility of Analog Signals for Electrouic Industrial Process
Instruments" and may serve .s a transmission link between
such system elements as computers, controllers, actuators, re-
corders and indicators.
Small Size: To conserve board space, the 2B23 is packaged in a
compact, 1.8" x 2.4" x 0.6" module.
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