M-system Lc2 User manual

LC2 / LCS2

EM-1357P. 1 / 3

BEFORE USE ....

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

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 (body + base socket) ..................... (1)

■ MODEL NO.

Check that model No. described on the specification label is

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

■ POWER INPUT RATINGS

• Check the power rating for the unit on the specification label.

AC power: Rating ±10%, 50/60 Hz, approx. 5VA

Rating 24V DC: 24V ±10%, approx. 150mA

■ UNPLUGGING THE UNIT

• Before you remove the unit from its base socket or mount it,

turn off the power supply and 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 ventila-

tion.

• 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 -5 to +60°C (23

to140°F)withrelativehumiditywithin 30 to 90% RHin order

to ensure adequate life span and operation.

■ WIRING

• Do not install cables (power supply, 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 power is

supplied, however, a warm up for 10 minutes is required for

satisfying complete performance described in the data sheet.

COMPONENT IDENTIFICATION

■ HOW TO OPEN THE FRONT COVER:

Position your finger on the hook at the top of front cover and

pull.

INSTALLATION

Detach the yellow clamps located at the top and bottom of the

unit for separating the body from the base socket.

■ DIN RAIL MOUNTING

Set the base socket so that its

DIN rail adaptor is at the bottom.

Position the upper hook at the

rear side of base socket on the

DIN rail and push in the lower.

When removing the socket, push

down the DIN rail adaptor utiliz-

ing a minus screwdriver and pull.

■ WALL MOUNTING

Refer to the drawings in the fol-

lowing page.

Body Base Socket

Connection

Diagram Label

Front Cover

Specification

Label

LCD Meter

(optional)

INSTRUCTION MANUAL

MODEL LC2/LCS2

STRAIN GAUGE TRANSMITTER

(remote sensing)

Clamp

(top & bottom)

DIN Rail

35mm wide

Spring Loaded

DIN Rail Adaptor

Shape and size of the base socket

are slightly different with various

socket types.

The shape of base socket may be different

for some models.

LC2 / LCS2

EM-1357P. 2 / 3

TERMINAL CONNECTIONS

Connect the unit as in the diagram below or refer to the connection diagram label on top of the unit.

■ DIMENSIONS mm (inch)

■CONNECTION DIAGRAM

5678

1110

80 (3.15)

50 (1.97) 107 (4.21)

136 (5.35) [3.3 (.13)]

80 (3.15)

(.79)

35.4 (1.39)

40 (1.57)

50 (1.97)

7.8 (.31)

CLAMP

(top & bottom)

DIN RAIL

35mm wide

2–4.5 (.18) dia.

MTG HOLE

25 (.98) deep

11–M3.5

SCREW

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

INPUT

EXC.

REMOTE

SEMSING

–

OUTPUT

U(+)

V(–) POWER

–

STRAIN

GAUGE

–

Close across the terminal 3 – 4 and 5 – 9

when the remote sensing is not used.

LC2 / LCS2

EM-1357P. 3 / 3

CHECKING

1) Terminal wiring: Check that all cables are correctly

connected according to the connection diagram.

2) Power input voltage: Check voltage across terminals 7 –

8 with a multimeter.

3) Straingauge: Check the bridge resistance. The maximum

current supplied to the strain gauge is 65mA.

4) Input: When applying maximum load, check that voltage

across terminals 10 (+) – 11 (–) equals Exc. ×Strain Gauge

Sensitivity.

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

scribed specifications.

ADJUSTMENT PROCEDURE

• LCD Meter

Indicates input in % (0 – 100%).

• Excitation Adj.

The excitation voltage is calibrated at the factory, therefore

will not usually require adjustment, except when used in

combination with a strain gauge of sensitivity other than

described on the specification label.

In that case, adjust to the value calculated by the equation

below:

Excitation [V] = 5 [V] ×a [mV/V]

b [mV/V]

where

a: Sensitivity described on the specification label

b: User's sensitivity value

Adjustable range is within 2V to 5V with the bridge resist-

ance 350Ω.

• Zero Adj. (Tare Adj.)

Max. 80% of input span can be adjusted.

Without any load, adjust the output to 0%.

• Span Adj. (Gain Adjustment)

Max. 100 –␣ 20% of input span can be adjusted.

With the full load, adjust the output to 100%.

MAINTENANCE

Regular calibration procedure is explained below:

■ CALIBRATION

Warm up the unit for at least 10 minutes. Apply 0%, 25%,

50%, 75% and 100% input signals. 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 above.

Span Adj.

Zero Adj.

Excitation Adj.

LCD Meter

M-SYSTEM WARRANTY

M-System warrants such new M-System product which it manufactures to be free from defects in materials and workmanship during the 36-month period following the date that such

productwasoriginallypurchasedifsuchproducthasbeenusedundernormaloperatingconditionsandproperlymaintained,M-System'ssoleliability,andpurchaser'sexclusiveremedies,

under this warranty are, at M-System's option, the repair, replacement or refund of the purchase price of any M-System product which is defective under the terms of this warranty. To

submit a claim under this warranty, the purchaser must return, at its expense, the defective M-System product to the below address together with a copy of its original sales invoice.