M-system Mls User manual

MLS

P. 1 / 3 EM-1644

INSTRUCTION MANUAL

MODEL MLS

Input Resistor

DIGITAL MULTIPLIER

■FRONT PANEL CONFIGURATIONS

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 bot-

tom. Position the upper hook

at the rear side of base socket

on the DIN rail and push in

thelower. Whenremovingthe

socket, push down the DIN

rail adaptor utilizing a screw-

driver (–) and pull.

■ WALL MOUNTING

Refer to the drawings in the

following page.

TERMINAL CONNECTIONS

Connect the unit as in the diagram in the next page or refer

to the connection diagram label on top of the unit.

When input resistors are provided with the module, attach

them together with input wiring to the input screw termi-

nals.

The negatives of the input signals must be of the same

potential.

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.

Body Base Socket

Connection

Diagram Label

Front Cover

LCD Meter

(optional)

Specification

Label

The shape of base socket may be different

for some models.

BEFORE USE ....

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

package you received as 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)

Input resistors ......................................................... (2)

The resistors are provided only with current input type.

■ MODEL NO.

Check that model No. described on specification label is

exactly what you ordered.

■ INSTRUCTION MANUAL

This manual describes necessary points of caution when you

use this product, installation, connection and basic mainte-

nance procedures.

COMPONENT IDENTIFICATION

■ HOW TO OPEN THE FRONT COVER:

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

pull.

Front Cover (open)

Span Adj.

Zero Adj.

MLS

P. 2 / 3 EM-1644

–

*Input shunt resistor attached for current input.

INPUT 1

OUTPUTR

–

INPUT 2

U(+)

V(–) POWER

■

TERMINAL ASSIGNMENTS

2187

12 (.47)

INPUT RESISTOR

(model: REM)

Input shunt resistor attached

for current input.

DRAWINGS mm (inch)

■ DIMENSIONS

3456

2187

80 (3.15)

50 (1.97) 107 (4.21)

127 (5) [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

15 (.59) deep

8–M3.5

SCREW

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

■

CONNECTION DIAGRAM

MLS

P. 3 / 3 EM-1644

CHECKING

1) Terminal wiring: Check that all cables are correctly

connected according to the connection diagram.

2) Power input voltage: Check voltage across the terminal 7

–␣ 8 with a multimeter.

3) Inputs: Check that the input signals are within 0 – 100%

of the full-scale.

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 calibra-

tion.

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. Turn the power supply on and warm up for

more than 10 minutes.

1) ZERO: Apply the input signals which should lead the

calculated result as 0%, and adjust output to 0%.

2) SPAN:

[K1×␣K2≥1] Apply the input signals which should lead the

calculated result as 100%, and adjust output to 100%.

[K1×␣K2< 1] Apply the input signals which should lead the

calculated result as [100 ×K1×␣K2] %, and adjust output to

[100 ×K1×␣K2] %.

3) Check ZERO adjustment again.

4) When ZERO value is changed, repeat the above procedure

1) – 3).

EQUATION

Output = K1×Input 1 ×␣K2×␣ Input 2

K1, K2: 0.10 –␣ 1.15 (parameters)

Input 1, Input 2: 0 –␣ 115%;

Forcibly limited to 0% or 115% with overrange.

Output: 0 – 115% with K1×K2≥1;

Forcibly limited to 0% or 115% with overrange.

0 – [115 ×␣K

1×K2] % with K1×K2< 1;

Forcibly limited to 0% or [115 ×␣K

1×K2] %

with overrange.

K1, K2are ex-factory specified.

[example] K1K2INP1 INP2 OUT

1.00 1.15 115% 100% 115%

1.00 1.15 100% 50% 57.5%

1.00 1.15 100% -5% 0%

POINTS OF CAUTION

■ GENERAL

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

turn off the power supply and input signal for safety.

■ ENVIRONMENT

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

install the unit inside proper housing and ventilate it.

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

vibration. Do not apply physical impact to the unit.

• Environmental temperature must be within -5 to +60°C (23

to140°F)withrelativehumiditywithin30to90%RHinorder

to ensure adequate life span and operation.

• Be sure that the ventilation slits are not covered with

cables, etc.

■ 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.

MAINTENANCE

Regular calibration procedure is explained below:

■ CALIBRATION

[K1×␣K2≥1]

Warm up the unit for at least 10 minutes. Apply the input

signals which should lead the calculated results as 0%, 25%,

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

respective input signal remains within accuracy described in

the data sheet.

[K1×␣K2< 1]

Warm up the unit for at least 10 minutes. Apply the input

signals which should lead the calculated result as 0%, [25 ×

K1×␣K2] %, [50 ×K1×␣K2] %, [75 ×K1×␣K2] %, and [100 ×K1

×␣K2] %. Check that the output signal for the respective input

signals shows 0%, [25 ×K1×␣K2] %, [50 ×K1×␣K2] %, [75 ×K1

×␣K2] %, and [100 ×K1×␣K2] %, andit remains within accuracy

described in the data sheet.

When the output is out of tolerance, recalibrate the unit

according to the "ADJUSTMENT PROCEDURE" explained

earlier.

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.