SCM5B33-02 [ETC]

Isolated True RMS Input Modules; 隔离式真RMS输入模块


型号：	SCM5B33-02
厂家：	ETC
描述：	Isolated True RMS Input Modules 隔离式真RMS输入模块
文件：	总2页 (文件大小：29K)
中文：	中文翻译
下载：	下载PDF数据表文档文件

SCM5B33

Isolated True RMS Input Modules

FEATURES

DESCRIPTION

● INTERFACES RMS VOLTAGE (0 – 300V) OR RMS CURRENT (0 – 5A)

Each SCM5B33 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 process voltage or current output

(Figure 1).

● DESIGNED FOR STANDARD OPERATION WITH FREQUENCIES OF

45HZ TO 1000HZ (EXTENDED RANGE TO 20Khz)

● COMPATIBLE WITH STANDARD CURRENT AND POTENTIAL

The SCM5B modules are designed with a completely isolated computer side

circuit which can be floated to ±50V from Power Common, pin 16. This

complete isolation means that no connection is required between I/O

Common and Power Common for proper operation of the output switch. If

desired,theoutputswitchcanbeturnedoncontinuouslybysimplyconnecting

pin 22, the Read-Enable pin to I/O Common, pin 19.

TRANSFORMERS

● INDUSTRY STANDARD OUTPUTS OF EITHER 0-1MA, 0-20mA,

4-20MA, 0-5V OR 0-10VDC

● ±0.25% FACTORY CALIBRATED ACCURACY (ACCURACY CLASS

0.2)

The field voltage or current input signal is processed through a pre-amplifier

and RMS converter on the field side of the isolation barrier. The converted dc

signalisthenchoppedbyaproprietarychoppercircuitandtransferredacross

the transformer isolation barrier, suppressing transmission of common

modespikesandsurges.Thecomputersidecircuitryreconstructs,filtersand

converts the signal to industry standard outputs. Modules are powered from

+5VDC, ±5%.

● 1500 VRMS CONTINUOUS TRANSFORMER BASED ISOLATION

● INPUT OVERLOAD PROTECTED TO 480V MAX (PEAK AC & DC) OR

10A RMS CONTINUOUS

● ANSI/IEEE C37.90.1-1989 TRANSIENT PROTECTION

● REGULATORY COMPLIANCE (TO BE DETERMINED)

For current output models an external loop supply is required having a

compliancevoltageof14to48VDC.Connection,withseriesload,isbetween

Pin 20 (+) and Pin 19 (-).

Pre-Amp,

Conversion

+EXC

Isochopper™

LPF

V_OUT^orI_OUT

Amplifier

Surge

Suppression

and

AC Source +In

Pat Pending

I_IN

I/O Common

RD EN\

Protection

–V

–In

–EXC

Isolated

Computer-Side

Power

Backpanel

Term Block

+5V

Isolated

Field-Side

Power

Oscillator

–V

* Current Input Models Only

Add Jumpers for Current Input Modules

(provided with SCM5B33-06, 07)

Power Common

FIGURE 1. SCM5B33 Block Diagram.

Call 800-444-7644

DATAFORTH

For Information and Assistance

A Burr- Brown Company

SPECIFICATIONS Typical at T = +25°C and +5V power.

SCM5B33

Module

Input

Signal Range

100mV to 300V rms, 0 to 5A rms

45Hz to 1000Hz

Standard Frequency Range

Extended Frequency Range

Impedance

1kHz to 20kHz

1 MΩ ±1% shunted by 100pF (-01 thru -05),

0.10Ω (-06), 0.025Ω (-07)

Coupling

Protection⁽¹⁾

Continuous (-01 thru -05)

Continuous (-06 thru -07)

Transient (-01 thru -05)

Transient (-06 thru -07)

300V rms

10A rms

ANSI/IEEE C37.90.1-1989

See note 2

ORDERING INFORMATION

Output

Signal Range

Current Limit

MODEL

INPUT* (rms)

OUTPUT* (dc)

0-5V or 0-10V or 0-1mA or 0-20mA or 4-20mA

1.4mA (0-1mA models), 30mA (0/4-20mA models),

8mA (0-5, 0-10V models)

SCM5B33-01

SCM5B33-02

SCM5B33-03

SCM5B33-04

SCM5B33-05

SCM5B33-06

SCM5B33-07

0-100mV

0-1V

0-10V

0-150V

0-300V

0-1A

0-5V

Voltage Limit

Resistance

Protection

Ripple and Noise (100Khz)

±18V (0-5, 0-10V models)

50Ω (0-5, 0-10V models)

Continuous Short to Ground

0.025% Span rms

(3)(4)

Accuracy

Sinusoid

50/60 Hz

0-5A

±0.25% Span

45Hz to 1kHz

1kHz to 20kHz

Non-Sinusoid

Crest Factor = 1 to 2

Crest Factor = 2 to 3

Crest Factor = 3 to 4

Crest Factor = 4 to 5

Vs. Temperature

±0.25% Reading Additional Factor

±0.75% Reading Additional Factor

SCM5B33-01B

SCM5B33-02B

SCM5B33-03B

SCM5B33-04B

SCM5B33-05B

SCM5B33-06B

SCM5B33-07B

0-100mV

0-1V

0-10V

0-150V

0-300V

0-1A

0-1mA

±0.05% Reading Additional Error

±0.15% Reading Additional Error

±0.30% Reading Additional Error

±0.40% Reading Additional Error

±100ppm/°C

0-5A

Isolation (Common Mode)

Input to Output, Input to Power

Continuous

Transient

Output to Power

Continuous

1500Vrms max

ANSI/IEEE C37.90.1-1989

SCM5B33-01C

SCM5B33-02C

SCM5B33-03C

SCM5B33-04C

SCM5B33-05C

SCM5B33-06C

SCM5B33-07C

0-100mV

0-1V

0-10V

0-150V

0-300V

0-1A

4-20mA

50Vdc max

100dB

Rejection (50-60Hz Common Mode)

Response Time (0 to 99%)

<400ms

0-5A

Output Enable Control

Selection Time

Voltage

Max Logic “0”

Min / Max Logic “1”

Current, “0,1”

6.0µS @ C_LOAD= 0 to 2000pF

SCM5B33-01D

SCM5B33-02D

SCM5B33-03D

SCM5B33-04D

SCM5B33-05D

SCM5B33-06D

SCM5B33-07D

0-100mV

0-1V

0-10V

0-150V

0-300V

0-1A

0-10V

+0.8V

+2.4V / +36V

0.5µA

Loop Voltage

Load Resistance (maximum)

+7.5Vdc min, +26Vdc max, -40˚C to +85˚C

(Loop Voltage - 14) / (Loop Current)

Supply Voltage

Current

+5VDC ±5%

120mA

0-5A

Sensitivity

±200ppm/%

SCM5B33-01E

SCM5B33-02E

SCM5B33-03E

SCM5B33-04E

SCM5B33-05E

SCM5B33-06E

SCM5B33-07E

0-100mV

0-1V

0-10V

0-150V

0-300V

0-1A

0-20mA

Environmental

Operating Temp. Range

Storage Temp. Range

Relative Humidity

Emissions

-40˚C to +85˚C

0 to 90% noncondensing

EN50081-1, ISM Group 1, Class A (Radiated, Conducted)

EN50082-1, ISM Group 1, Class A (ESD, RF, EFT)

2.28" x 2.26" x 0.60" (58mm x 57mm x 15mm)

Immunity

Dimensions

0-5A

NOTE:

(1) SCM5B33 and SCMPB01, 02, 03, 04, 05, 06, 07, XEV rating only. Backpanels obtained

from other sources may have lower ratings.

* Modules can be ordered with other input/output ranges. Consult factory for

ordering details and specifications.

(2) For 1 to 25 seconds the max allowable transient current rating is √2500 / (event time). For

less than 1 second, ANSI/IEEE C-37.90.1-1989 applies with a 0.05Ω load. For greater than

25 seconds, the 10A rms continuous rating applies.

(3) At standard 60Hz factory calibration. Consult factory for calibration at other frequencies.

(4) For 10-100% rated span. Add an additional 0.25% error for 0-10% Span measurements.

Accuracy includes nonlinearity, hysteresis and repeatability but not source or external shunt

inaccuracy (if used).

Call 800-444-7644

For Information and Assistance

DATAFORTH

A Burr- Brown Company

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