M-system LTCNE Bedienungsanleitung

MODEL: LTCNE

Power Transducer Series LT-UNIT

AC CURRENT TRANSDUCER

(Self-powered, RMS sensing)

Functions & Features

• Converts alternating current from a current transformer

into a standard process signal

• Minimum ripple

• True RMS sensing

• No auxiliary power source required

• Isolation up to 2000 V AC

• High-density mounting

• Conforms to IEC 60688

Typical Applications

• Centralized monitoring and control of motors, pumps or

heaters by DCS

• Monitoring power line and power supply current

(1.54)

143 (5.63)

111

(4.37)

mm (inch)

MODEL: LTCNE–[1][2][3]

ORDERING INFORMATION

• Code number: LTCNE–[1][2][3]

Specify a code from below for each [1] through [3].

(e.g. LTCNE-1G/T)

[1] INPUT

Current

1: 0 – 1 A AC (used within 0.1 – 1 A)

2: 0 – 2A AC (used within 0.2 – 2 A)

5: 0 – 5 A AC (used within 0.5 – 5 A)

[2] OUTPUT

Current

G: 0 – 1 mA DC (Load resistance 5000 Ω max.)

Voltage

3: 0 – 1 V DC (Load resistance 2000 Ω min.)

4: 0 – 10 V DC (Load Resistance 20 kΩ min.)

5: 0 – 5 V DC (Load resistance 10 kΩ min.)

[3] OPTIONS

Terminal cover

blank: Without

/T: With

GENERAL SPECIFICATIONS

Connection: M4 screw terminals (torque 1.2 N·m)

Screw terminal: Chrome-plated steel

Housing material: Flame-resistant resin (black)

Isolation: Input to output

Input waveform: Up to 15 % of 3rd harmonic content

Overrange output: 10 – 120 % at 0 – 5 V

Span adjustment: 95 to 105 % (front)

INPUT SPECIFICATIONS

Frequency: 50 or 60 Hz

Operational range: 10 – 120 % of rating

Overload capacity: 4000 % of rating for 1 sec., 2000 % for 4

sec., 120 % continuous

Input burden: 2 VA

CURRENT [%]

2000 4000

TIME [s]

• Overload Capacity

OUTPUT SPECIFICATIONS

■OPERATION DIAGRAM

50 100

IN %

OUT %

100

Note: The described accuracy is not assured within 0 –10%

of the rating, though output signal exists.

INSTALLATION

Operating temperature: -10 to +55°C (14 to 131°F)

Operating humidity: 30 to 85 %RH (non-condensing)

Mounting: Surface or DIN rail

Weight: 300 g (0.66 lbs)

Rugghölzli 2

CH - 5453 Busslingen Tel.+41 (0)56 222 38 18

Fax +41 (0)56 222 10 12 mailbox@sentronic.com

www.sentronic.com

Produkte, Support und Service

SENTRONICAG

MODEL: LTCNE

PERFORMANCE in percentage of span

Accuracy: ±0.5 % (at 23°C ±10°C or 73.4°F ±18°F,

45 – 65 Hz)

Magnetic field (ext. origin) effect: ± 0.5 % (400 A/m)

Response time: ≤ 2 sec. (0 – 100 % ±1 %)

Ripple: 0.5 %p-p max.

Insulation resistance: ≥ 100 MΩ with 500 V DC

Dielectric strength: 2000 V AC @1 minute

(input to output to ground)

Impulse withstand voltage: 1.2 / 50 μsec., ±5 kV

(input to output or ground)

STANDARDS & APPROVALS

IEC Standard: IEC 60688

CONNECTION DIAGRAM

LOAD

SOURCE

–OUTPUT

EXTERNAL DIMENSIONS & TERMINAL ASSIGNMENTS unit: mm (inch)

6 7

123

[4 (.16)]143 (5.63)

DIN RAIL

35mm wide

8 (.31)

27 (1.06)

39 (1.54)

• When mounting, no extra space is needed between units.

98 (3.86)

80 (3.15)

111 (4.37)

2–M4 MTG HOLE 7–M4 SCREW

10 (.39)

(.12)

TERMINAL COVER (option /T)

Specifications are subject to change without notice.

Rugghölzli 2

CH - 5453 Busslingen Tel.+41 (0)56 222 38 18

Fax +41 (0)56 222 10 12 mailbox@sentronic.com

www.sentronic.com

Produkte, Support und Service

SENTRONICAG

LTCNE

P. 1 / 2EM-3352 Rev.1

AC CURRENT TRANSDUCER

(self-powered) MODEL LTCNE

INSTRUCTION MANUAL

BEFORE USE ....

Thank you for choosing M-System. Before use, please check

contents of the package you received as outlined below.

If you have any problems or questions with the product,

please contact M-System’s Sales Ofﬁce or representatives.

■ PACKAGE INCLUDES:

Signal conditioner......................................................... (1)

■ MODEL NO.

Conﬁrm Model No. marking on the product to be exactly

what you ordered.

■ INSTRUCTION MANUAL

This manual describes necessary points of caution when

you use this product, including installation, connection and

basic maintenance procedures.

POINTS OF CAUTION

■ GENERAL PRECAUTIONS

• Before you remove or mount the unit, turn off the input

signal for safety.

■ ENVIRONMENT

• Indoor use

•When heavy dust or metal particles are present in the air,

install the unit inside proper housing with sufﬁcient ven-

tilation.

• Do not install the unit where it is subjected to continuous

vibration. Do not subject the unit to physical impact.

• Environmental temperature must be within -10 to +55°C

(14 to 131°F) with relative humidity within 30 to 85% RH

in order to ensure adequate life span and operation.

■ WIRING

•Do not install cables (input and output) close to noise

sources (relay drive cable, high frequency line, etc.).

• Do not bind these cables together with those in which

noises are present. Do not install them in the same duct.

■ AND ....

• The unit is designed to function as soon as the input sig-

nal is supplied, however, a warm up for 10 minutes is re-

quired for satisfying complete performance described in

the data sheet.

COMPONENT IDENTIFICATION

INSTALLATION

■ DIN RAIL MOUNTING

Set the unit so that its DIN rail adaptor is at the bottom.

Position the upper hook at the rear side of the unit on the

DIN rail and push in the lower. When removing the unit,

push down the DIN rail adaptor utilizing a minus screw-

driver and pull.

■ WALL MOUNTING

Refer to “EXTERNAL DIMENSIONS.”

Connection

Diagram

Span Adjustment

Body

Specifications

DIN Rail

35mm wide

Spring Loaded

DIN Rail Adaptor

Rugghölzli 2

CH - 5453 Busslingen Tel.+41 (0)56 222 38 18

Fax +41 (0)56 222 10 12 mailbox@sentronic.com

www.sentronic.com

Produkte, Support und Service

SENTRONICAG

LTCNE

TERMINAL CONNECTIONS

Connect the unit as in the diagram below or refer to the con-

nection diagram on the side of the unit.

CHECKING

1) Terminal wiring: Check that all cables are correctly con-

nected according to the connection diagram.

2) Input: Check that the input signal is within 10 – 120% of

the full-scale. Be sure to short the secondary side of CT

or turn off the current at its primary side to prevent the

CT from burning when the cables are to be disconnected

from input terminals.

4) Output: Check that the load resistance meets the de-

scribed speciﬁcations.

ADJUSTMENT PROCEDURE

This unit is calibrated at the factory to meet the ordered

speciﬁcations, therefore you usually do not need any cali-

bration.

For matching the signal to a receiving instrument or in case

of regular calibration, adjust the output as explained in the

following.

■ HOW TO CALIBRATE THE OUTPUT SIGNAL

Use a signal source and measuring instruments of sufﬁcient

accuracy level. SPAN is adjustable within ±5%. Apply 100%

input and adjust output to 100%.

MAINTENANCE

Regular calibration procedure is explained below:

■ CALIBRATION

Warm up the unit for at least 10 minutes. Apply 10%, 25%,

50%, 75% and 100% input signal. Check that the output

signal for the respective input signal remains within accu-

racy described in the data sheet. When the output is out of

tolerance, recalibrate the unit according to the “ADJUST-

MENT PROCEDURE” explained earlier.

EXTERNAL DIMENSIONS unit: mm (inch)

LOAD

SOURCE

–OUTPUT

6 7

123

[4 (.16)]143 (5.63)

DIN RAIL

35mm wide

8 (.31)

27 (1.06)

39 (1.54)

• When mounting, no extra space is needed between units.

98 (3.86)

80 (3.15)

111 (4.37)

2–M4 MTG HOLE 7–M4 SCREW

10 (.39)

(.12)

TERMINAL COVER (option /T)

Rugghölzli 2

CH - 5453 Busslingen Tel.+41 (0)56 222 38 18

Fax +41 (0)56 222 10 12 mailbox@sentronic.com

www.sentronic.com

Produkte, Support und Service

SENTRONICAG

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