M-System M3LDY User Manual

INSTRUCTION MANUAL

M3LDY

CURRENT LOOP SUPPLY

(linearizing; field- and PC-configurable)

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 .......................................................(1)

I/O range and tag name label sheet ........................... (1)

■ MODEL NO.

Check that the model No. described on the specification label
is exactly what you ordered.

■ INSTRUCTION MANUAL

This manual describes the necessary points of caution when
you use this product, including installation, connection and
basic maintenance procedures.
The M3LDY with Option /A is programmable using the PC
configurator software. For detailed information on the PC
configuration, refer to the M3CON instruction manual. The
M3CON PC Configurator Software is downloadable at M­System’s web site: http://www.m-system.co.jp.

MODEL

■ WIRING

• Do not install cables (power supply, input and output) close
to noise sources (relay drive cable, high frequency line, etc.).

• Do not bind the unit's cables together with cables where
high noise levels 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.

M3LDY

COMPONENT IDENTIFICATION

Body

Specification Label

(side)

SW Setting Label

POINTS OF CAUTION

■ CONFORMITY WITH UL

(UL is unavailable for certain model suffix options.)

• This equipment is suitable for use in a Pollution Degree 2
environment.

• This equipment is to be used with the maximum operating
voltage 30Vrms and 42.4Vpeak or 60V DC.

• The equipment must be mounted inside a suitable fire
enclosure.

• Operating temperature: -25 to +55°C (-13 to +131°F)

■ POWER INPUT RATING & OPERATIONAL RANGE

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

Rating 24V DC: 24V ±10%, approx. 3W

• Power fuse: A power fuse of the rating as shown below is
incorporated for safety. However, DO NOT replace it by the
user.

T 0.25A 125V

■ SAFETY PRECAUTION

• Before you remove the unit 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 ventila­tion.

• 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 -25 to +65°C
(-13 to +149°F) with relative humidity within 0 to 95% RH in
order to ensure adequate life span and operation.

■ HOW TO OPEN THE COVER WHEN SETTING DIP SW

Hold at the top and bottom of the unit as shown below and
slide the housing cover gently to open until it hits the latching
inside the unit.

Caution:
Handle the cover carefully to protect internal components from damage.
DO NOT pull beyond where the housing cover is latched. The plastic
housing may be damaged.

• Housing Cover Fully Opened

EM-2664 Rev.2P. 1 / 6

■ HOW TO SEPARATE THE TERMINAL BLOCKS

When you need to separate the terminal blocks from the
transmitter body for wiring, insert a minus driver between
the terminal block and the housing body, pull up the driver
and pull out the terminal block.

TERMINAL CONNECTIONS

Connect the unit by referring to the diagram below.

■ EXTERNAL DIMENSIONS mm (inch)

M3LDY

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 screwdriver and
pull.

DIN Rail

35mm wide

Spring Loaded

DIN Rail Adaptor

■ CONNECTION DIAGRAM

2-WIRE

TRANSMITTER

+

+
–

MONITOR

(1 – 5VDC)

CONFIGURATOR

1

–

2
3

+

4

V

–

JACK

10 11 12

789

106 (4.17)

123

456

18 (.71) 110.5 (4.35)

+

7

–

8

+

11

–

12

62 (2.44)

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

OUTPUT

POWER

DIN RAIL
35mm wide

35.4 (1.39)

[3.3 (.13)]

■When Used as Isolator

No Connection

INPUT

1

+

2

–

3

250Ω

24.9Ω

EM-2664 Rev.2P. 2 / 6