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DI-5B33 Isolated True RMS Input Modules DI-5B33 Isolated True RMS Input Modules
FEATURES
Interfaces RMS Voltage (0 300V)
Designed for Standard Operation
with Frequencies of 45Hz to 1000Hz
(Extended Range to 20Khz)
Compatible with Standard Current
and Potential Transformers
�0.25% Factory Calibrated Accuracy
(Accuracy Class 0.2)
1500 VRMS Continuous Transformer
Based Isolation
Input Overload Protected to 480V
Max (Peak AC and DC) or 10A RMS
Continuous
ANSI/IEEE C37.90.1-1989 Transient
Protection
Regulatory Compliance (To Be De-
termined)
DESCRIPTION
Each DI-5B33 True RMS input module
provides a single channel of AC input
which is converted to its True RMS dc
value, filtered, isolated, amplified, and
converted to a standard voltage output (see
block diagram).
The DI-5B modules are designed with a
completely isolated computer side circuit
which can be floated to �50V from Power
Common, pin 16. This complete isola-
tion means that no connection is required
between I/O Common and Power Common
for proper operation of the output switch.
If desired, the output switch can be turned
on continuously by simply connecting pin
22, the Read-Enable pin to I/O Common,
pin 19.
The field voltage input signal is processed
through a preamplifier and RMS converter
on the field side of the isolation barrier.
The converted dc signal is then chopped by
a proprietary chopper circuit and trans-
ferred across the transformer isolation bar-
rier, suppressing transmission of common
mode spikes and surges. The computer side
circuitry reconstructs, filters and converts
the signal to industry standard outputs.
Modules are powered from +5VDC, �5%.
SPECIFICATIONS

Typical at T
A
= +25�C and +5V Power
DI-5B33
INPUT
Signal Range
100mV to 300V rms
Standard Frequency Range
45Hz to 1000Hz
Extended Frequency Range
1kHz to 20kHz
Impedance
1M �1% shunted by 100pF
Coupling
AC
Protection*
Continuous
Transient
480V (Peak AC & DC)
ANSI/IEEE C37.90.1-1989
ACCURACY**
Sinusoid
50/60Hz
45Hz to 1kHz
1kHz to 20kHz
�0.25% Span
�0.25% Reading Additional Factor
�0.75% Reading Additional Factor
Non-Sinusoid
Crest Factor = 1 to 2
Crest Factor = 2 to 3
Crest Factor = 3 to 4
Crest Factor = 4 to 5
�0.05% Reading Additional Error
�0.15% Reading Additional Error
�0.30% Reading Additional Error
�0.40% Reading Additional Error
Vs. Temperature
�100ppm/�C
ISOLATION (Common Mode)
Input to Output, Input to Power
Continuous
Transient
1500Vrms max
ANSI/IEEE C37.90.1-1989
Output to Power (Continuous)
50Vdc max
OUTPUT ENABLE CONTROL
Selection Time
6.0�S @ C
load
= 0 to 2000pF
Voltage
Max Logic 0
Min / Max Logic 1
+0.8V
+2.4V / +36V
Current, 0,1
0.5�A
OTHER
Rejection (50-60Hz Common Mode)
100dB
Response Time (0 to 99%)
<400ms
Loop Voltage
+14Vdc min, +48Vdc max
Load Resistance (maximum)
(Loop Voltage -14) / (Loop Current)
Supply Voltage
+5VDC �5%
Supply Current
30mA
Supply Sensitivity
�200�V/% RTI
EnvironmentalOperating Temperature
Storage Temperature
Relative Humidity
-40�C to +85�C
-40�C to +85�C
0 to 90% Noncondensing
Mechanical Dimensions
2.28" � 2.26" � 0.60"
(58mm � 57mm � 15mm)
*Module Rating Only.
**At standard 60Hz factory calibration. For 10 to 100% rated span. Add an additional 0.25% error for 0
to 10% Span measurements. Accuracy includes nonlinearity, hysteresis and repeatability but not source or
external shunt inaccuracy (if used).
DATAQ Instruments, Inc. 241 Springside Drive Akron, Ohio 44333 Tel: 330-668-1444 Email: support@dataq.com www.dataq.com Block Diagram
DI-5B33 Isolated True RMS Input Modules
Ordering Information
Model Number
Input Range
Output Range
DI-5B33-01
100mV
0V to +5V
DI-5B33-02
1V
0V to +5V
DI-5B33-03
10V
0V to +5V
DI-5B33-04
150V
0V to +5V
DI-5B33-05
300V
0V to +5V
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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.
241 Springside Drive
Akron, Ohio 44333
330-668-1444