DI-8B35 Input Modules Datasheet

DI-8B35 Datasheet, PDF, Equivalent


Part Number

DI-8B35

Description

Linearized 4-Wire RTD Input Modules

Manufacture

ETC

Total Page 2 Pages
Datasheet
Download DI-8B35 Datasheet


DI-8B35
DI-8B35 Linearized 4-Wire RTD Input Modules
FEATURES
• Interfaces to 100Ω Platinum RTDs
• Linearizes RTD Signal
• High Level Voltage Outputs
• 1500Vrms Transformer Isolation
• ANSI/IEEE C37.90.1 Transient Pro-
tection
• Input Protected to 240VAC Continu-
ous
• 120dB CMR
• 70dB NMR at 60Hz
• Low Drift with Ambient Temperature
• CSA, FM and CE Certifications
Pending
• Mix and Match Module Types
DESCRIPTION
DI-8B modules are an optimal solution
for monitoring real-world process signals
and providing high level signals to a data
acquisition system. Each DI-8B35 module
isolates, filters, amplifies, and linearizes a
singlewww.DataSheet4U.com channel of temperature input from
an RTD and provides an analog voltage
output.
RTD excitation is provided from the
module using a precision current source.
Excitation current does not flow in the
input signal leads, which allows RTD mea-
surements to be made independent of lead
resistance. The exciation currents are small
(0.25mA) which minimizes self-heating of
the RTD.
Signal filtering is accomplished with a
three-pole filter optimized for time and
frequency response which provides 70dB
of normal-mode-rejection at 60Hz. One
pole of this filter is on the field side of the
isolation barrier for anti-aliasing, and the
other two are on the system side.
A special input circuit on the DI-8B35
module provides protection against ac-
cidental connection of power-line voltages
up to 240VAC. Clamp circuits on the I/O
and power terminals protect against harm-
ful transients.
The modules are designed for installation
in Class I, Division 2 hazardous locations
and have a high level of immunity to envi-
ronmental noise.
SPECIFICATIONS
Typical at TA = +25ºC and +5V Power
DI-8B35
Input Range Limits
-200˚C to +850˚C (100Ω Pt)
Input Resistance
Normal
Power Off
Overload
50MΩ
200kΩ
200kΩ
Input Protection
Continuous¹
Transient
240VAC
ANSI/IEEE C37.90.1
Sensor Excitation Current
0.25mA
Lead Resistance Effect
±0.001˚C/Ω²
CMV, Input to Output
1500Vrms max
Transient, Input to Output
ANSI/IEEE C37.90.1
CMR (50Hz or 60Hz)
120dB
NMR
70dB at 60Hz
Accuracy³
DI-8B35-01
DI-8B35-02
DI-8B35-03
DI-8B35-04
±0.20˚C
±0.15˚C
±0.20˚C
±0.45˚C
Stability
Output Offset
Gain
±20ppm/ºC
±50ppm/ºC
Noise
Output, 100kHz
250µVrms
Bandwidth, -3dB
3Hz
Response Time, 90% Span
150ms
Output Range
0 to +5V
Output Protection
Transient
Continuous Short to Ground
ANSI/IEEE C37.90.1
Power Supply Voltage
+5VDC ±5%
Power Supply Current
30mA
Power Supply Sensitivity
±25ppm/%
Mechanical Dimensions
1.11" × 1.65" × 0.40"
(28.1mm × 41.9mm × 10.2mm)
Environmental
Operating Temperature
Storage Temperature
Relative Humidity
-40ºC to +85ºC
-40ºC to +85ºC
0 to 95% Noncondensing
¹240VAC between + and - -/+EXC/-EXC terminals. 120VAC between - and +EXC/-
EXC terminals and between +EXC and -EXC terminals.
²Ω refers to the resistance in one lead.
³Includes conformity, hysteresis and repeatability.
DATAQ Instruments, Inc. • 241 Springside Drive • Akron, Ohio 44333 • Tel: 330-668-1444 • Email: support@dataq.com • www.dataq.com

DI-8B35
Block Diagram
DI-8B35 4-Wire RTD Input Module
Ordering Information
Model Number
Input Range
DI-8B35-01
-100°C to +100°C (-148°F to +212°F)
DI-8B35-02
0°C to +100°C (+32°F to +212°F)
DI-8B35-03
0°C to +200°C (+32°F to +392°F)
DI-8B35-04
0°C to +600°C (+32°F to +1112°F)
*Includes conformity, hysteresis, and repeatability.
Accuracy*
±0.20°C
±0.15°C
±0.20°C
±0.45°C
241 Springside Drive
Akron, Ohio 44333
330-668-1444
Data Acquisition Product Links
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Data Acquisition | Data Logger | Chart Recorder | Thermocouple | Oscilloscope
The information on this data sheet is subject to change without notice.
DATAQ and the DATAQ logo are registered trademarks of DATAQ Instruments, Inc. All rights reserved. Copyright © 2005 DATAQ Instruments, Inc.


Features DI-8B35 Linearized 4-Wire RTD Input Modu les FEATURES • Interfaces to 100Ω Pl atinum RTDs • Linearizes RTD Signal High Level Voltage Outputs • 1500V rms Transformer Isolation • ANSI/IEEE C37.90.1 Transient Protection • Inpu t Protected to 240VAC Continuous • 12 0dB CMR • 70dB NMR at 60Hz • Low Dr ift with Ambient Temperature • CSA, F M and CE Certifications Pending • Mix and Match Module Types SPECIFICATIONS Input Range Limits Input Resistance T ypical at TA = +25ºC and +5V Power DI -8B35 -200˚C to +850˚C (100Ω Pt) Nor mal Power Off Overload Continuous¹ Tra nsient 50MΩ 200kΩ 200kΩ 240VAC AN SI/IEEE C37.90.1 0.25mA ±0.001˚C/Ω² 1500Vrms max ANSI/IEEE C37.90.1 120dB 70dB at 60Hz ±0.20˚C ±0.15˚C ±0.20 ˚C ±0.45˚C ±20ppm/ºC ±50ppm/ºC 2 50µVrms 3Hz 150ms 0 to +5V Continuous Short to Ground ANSI/IEEE C37.90.1 +5VD C ±5% 30mA ±25ppm/% 1.11" × 1.65" × 0.40" (28.1mm × 41.9mm × 10.2mm) In put Protection Sensor Excitation Current Lead Resistance Effect CMV, Input to Output Transient, Input to Output CMR (50H.
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