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Data Stream

B

3500 Scarlet Oak Blvd. St. Louis MO USA 63122 V: 636-343-8518 F: 636-343-5119

Web:

http://www.crmagnetics.com

E-mail:

sales@crmagnetics.com

The Professional

Energy Monitoring

Company

ISO 9001:2008QualityManagementSystem

M N TI

RS485 Digital Current Transducer

CRD4150

Dual Element, 3-Wire

CRD4150

Dual Element, 3-Wire

CRD4170

3 Element, 4-Wire

N

L3

L1 L2

LOAD

9

8

7

6

5

+

-

+ -

485

SUPPLY

1

2

3

4

LOAD

1

2

3

4

5

6

7

9

8

L N

-

-

+

+

SUPPLY

485

-

-

+

+

LOAD

8

7

9

5

6

L3

L1

L2

SUPPLY

485

1

2

3

4

-

-

+

+

LOAD

8

7

9

5

6

L3

L1

L2

SUPPLY

485

1

2

3

4

CRD4110

Single Element, 2-Wire

Connection Diagram

LINE

N L1

LOAD

L

L2

LOAD

SUPPLY

N

LOAD

SUPPLY

S LY

L AD

L1 L

L

485

485

485

ASCII Simplified Programming Commands

A simplified data structure is used with only 6 commands required for full control of

the transducer. Commands are : Read Transducer Name, Read Configuration, Set

Configuration, Read Measurements, Read Energy Totalizer and Clear Energy

Totalizer. For illustration, the following commands are used to read data from a

CRD5170 3 Phase, 4 Wire Transducer with a device address of 00.

Command Transducer to Read Data:

#00A<cr>

Transducers Response:

>+[% FS Voltage L1-N ]+[% FS Current L1 ]+[% FS

Voltage L2-N ]+[% FS Current L2 ]+[% FS Voltage L3-N ]+[% FS Current L3 ,][+/- % FS

Power][+/-% FS VARS][+/-Power Factor][Frequency]<cr>

Command Transducer to Read Energy Totalizer:

#00W<cr>

Transducer Responds:

01[+/-KWHr]{\[+/-KVHr][check sum]<cr>

Note: This is for illustration purposes only, See Applications Guides (Section I

for complete instructions.

DATA+

DATA-

GND

+5VDC

COM

RS232

CRD485-232

SUPPLY

5

6

7

9

8

+ -

DATA STREAM

TRANSDUCER

TX

RX

GND

DB 9, FEMALE

1

2

3

4

CRD485-232

RS485 to RS232 Converter Accessory

Connect PC to RS485 Bus

SPECIFICATIONS

Basic Accuracy: .......................0.5%

Calibration: ..............................True RMS Sensing

Thermal Drift: ..........................500 PPM/°C

Operating Temperature

1

: ..........0°C to +60°C

Installation Category: ..............CAT II

Vibration Tested To: .................IEC 60068-2-6,1995

Pollution Degree: ....................2

Insulation Voltage: ..................2500 VDC

Altitude: ..................................2000 meter max

Frequency Range: .................20 Hz - 5 KHz

MTBF: ....................................Greater than 100K hours

Cleaning: ................................Water-dampened cloth

Supply Voltage

2

: ......................24 VDC ±10%

1) RH 5% to 95%, non-condensing 2) 0.4% max. ripple Vpp

3) Factory default settings: address 01, baud rate 9600, no parity,

Torque Specifications: ....................3.0 inch lbs (0.4Nm)

Response Time: .......................250 ms. max. 0-90% FS

Relative Humidity: ...............80% for temperatures up to

31°C and decreasing linearly to 50% at 40°C

Output Resolution: ..................................................16 bit

Transducer fanout on common bus: ...................64 max.

Baud Rate

3

: ...............

1200, 2400, 4800, 9600,19.2K

.bps

A/D Conversion Type: ..................4th order Delta Sigma

Device Address

3

: ............................................00 to FF

Data Format: .... .....................................................ASCII

Supply Current:..................Typical 30mA Max 30mA

Weight:.. ..............................................................0.5 lbs.

no flow control, 1 stop bit

2.874

(73)

0.79

(20)

2.99

(76)

0.20

(5.1)

(83)

3.268

OUTLINE DRAWING

9

8

7

6

5

1

2

3

4

1.42

(36)

DIA.

0.14

(3.5)

1.06

(26.8)

2.874

(73)

0.26 (6.5) Dia.

1 hole for single element

2 holes for two element

3 holes for three element

L1

L2