MG Mini-M M2LMS User manual

EM-5048 Rev.8 P. 1 / 3
MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
INSTRUCTION MANUAL
Mini-M™
LIMITER MODEL M2LMS
BEFORE USE ....
Thank you for choosing us. Before use, please check con-
tents of the package you received as outlined below.
If you have any problems or questions with the product,
please contact our sales office or representatives.
■PACKAGE INCLUDES:
Signal conditioner
(body + base socket + input resistor)..................................(1)
Input resistor is provided only with current input type.
■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
■NONINCENDIVE APPROVAL OPTION
• This equipment is suitable for use in Class I, Div. 2,
Groups A, B, C and D or Non-Hazardous Locations only.
• WARNING! Before You Remove the Unit from Its Base
Socket or Mount It, Turn Off the Power Supply and Input
Signal for Safety.
• WARNING! – Explosion Hazard –
Substitution of Components May Impair Suitability for
Class I, Div. 2.
• WARNING! – Explosion Hazard –
Do Not Disconnect Equipment Unless Power Has Been
Switched Off or The Area is Known To Be Non-Hazardous.
• The equipment was evaluated for use in the ambient tem-
perature and relative humidity as mentioned in ‘ENVI-
RONMENT’ section.
• The input and output wiring must be in accordance with
Class I, Div. 2 wiring methods and in accordance with the
authority having jurisdiction for use in these hazardous
locations.
■CONFORMITY WITH EU DIRECTIVES, UK LEGISLATION OR UL
• This equipment is suitable for Pollution Degree 2 and In-
stallation Category II (transient voltage 2500V). Rein-
forced insulation (signal input or output to power input:
300V) and basic insulation (signal input to output: 300V)
are maintained. Prior to installation, check that the insu-
lation class of this unit satisfies the system requirements.
• Altitude up to 2000 meters.
• The equipment must be mounted inside a panel.
• The equipment must be installed such that appropriate
clearance and creepage distances are maintained to con-
form to CE/UKCA/UL requirements. Failure to observe
these requirements may invalidate the CE/UKCA/UL
conformance.
• The actual installation environments such as panel con-
figurations, connected devices, connected wires, may affect
the protection level of this unit when it is integrated in a
panel system. The user may have to review the CE/UKCA
requirements in regard to the whole system and employ
additional protective measures* to ensure the CE/UKCA
conformity.
* For example, installation of noise filters and clamp fil-
ters for the power source, input and output connected
to the unit, etc.
• Install lightning surge protectors for those wires connect-
ed to remote locations.
■POWER INPUT RATING & OPERATIONAL RANGE
• Locate the power input rating marked on the product and
confirm its operational range as indicated below:
100 – 240V AC rating: 85 – 264V (90 – 264V for UL),
47 – 66 Hz, approx. 3 – 5VA
24V DC rating: 24V ±10%, approx. 3W
11 – 27V DC rating: 11 – 27V, approx. 3W
110V DC rating: 85 – 150V (110V ±10% for UL), approx. 3W
■GENERAL PRECAUTIONS
• 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
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 -5 to +55°C
(23 to 131°F) with relative humidity within 30 to 90% RH
in order to ensure adequate life span and operation.
• Be sure that the ventilation slits are not covered with ca-
bles, etc.
■WIRING
• Do not install cables 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 sup-
plied, however, a warm up for 10 minutes is required for
satisfying complete performance described in the data
sheet.
• With voltage output, do not leave the output terminals
shortcircuited for a long time. The unit is designed to
endure it without breakdown, however, it may shorten ap-
propriate life duration.

M2LMS
EM-5048 Rev.8 P. 2 / 3
MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
COMPONENT IDENTIFICATION
Input Resistor
Model
Body Base Socket
Connection
Diagram
Specifications
Fixing Screw
■FRONT PANEL CONFIGURATION
(C) High/Low Limit Selector
The front cover cannot be turned open by 180 deg.
when there is no extra space between units.
(A) Polarity Indicator LED
(B) High/Low Limit Display
(E) Zero Adj.
(F) Span Adj.
(D) UP/DOWN Control
Top: High Limit
Bottom: Low Limit
• How to Set High Limit
Turn the High/Low Limit Selector (C) to the top.
The High/Low Limit Display (B) shows the current high
limit (-10.0 – +105%). Press UP/DOWN Control (D) until
the display shows a desired set value.
The Polarity Indicator LED (A) is red when the set value is
in positive range, green when in negative range.
The high limit is factory set to 100%.
• How to Set Low Limit
Turn the High/Low Limit Selector (C) to the bottom.
The High/Low Limit Display (B) shows the current low lim-
it (-10.0 – +105%). Press UP/DOWN Control (D) until the
display shows a desired set value.
The Polarity Indicator LED (A) is red when the set value is
in positive range, green when in negative range.
The low limit is factory set to 0%.
INSTALLATION
Loosen the fixing screw at the front of the unit in order to
separate the body from the base socket.
DIN Rail
35mm wide
Spring Loaded
DIN Rail Adaptor
■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 utilizing a minus
screwdriver and pull.
■WALL MOUNTING
Refer to “EXTERNAL DIMENSIONS.”
TERMINAL CONNECTIONS
Connect the unit as in the diagram below or refer to the connection diagram on the side of the unit.
When an input resistor is provided with the module, attach it together with input wiring to the input screw terminals.
■EXTERNAL DIMENSIONS unit: mm (inch)
5
9
21.5 (.85)
70.5 (2.78)
86.7 (3.41)7.3 (.29) 15 (.59)
6 (.23)
59 (2.32)
DIN RAIL
35mm wide
[4 (.16)]
8–M3
SCREW
72 (2.83)
23 (.91)
2–4.2x5
(.17x.20)
MTG HOLE
6 (.24) deep
116.7 (4.59)
• When mounting, no extra space is needed between units.
14
8
12
14 13
4 (.16)

M2LMS
EM-5048 Rev.8 P. 3 / 3
MG CO., LTD. www.mgco.jp
5-2-55 Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
■CONNECTION DIAGRAM
1
4
+
–
*
*Input shunt resistor attached for current input.
INPUT R
+
–
OUTPUT
9
12
U(+)
V(–)
POWER
13
14
■TERMINAL ASSIGNMENTS unit: mm (inch)
58
9 12
14 13
INPUT RESISTOR
(model: REM2)
19 (.75)
Input shunt resistor attached
for current input.
14
WIRING INSTRUCTIONS
■SCREW TERMINAL
Torque: 0.8 N·m
■SOLDERLESS TERMINAL
Refer to the drawing below for recommended ring tongue
terminal size. Spade tongue type is also applicable.
Applicable wire size: 0.25 to 1.65 mm2(AWG 22 to 16)
Recommended manufacturer: Japan Solderless Terminal
MFG.Co.Ltd, Nichifu Co.,ltd
6 (.24) max
3.3 (.13) max
mm (inch)
CHECKING
1) Terminal wiring: Check that all cables are correctly con-
nected according to the connection diagram.
2) Power input voltage: Check voltage across the terminal
13 – 14 with a multimeter.
3) Input: Check that the input signal is 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 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. Turn the power supply on and warm up for
more than 10 minutes.
1) ZERO: Apply 0% input and adjust output to 0%.
2) SPAN: Apply 100% input and adjust output to 100%.
3) Check ZERO adjustment again with 0% input.
4) When ZERO value is changed, repeat the above proce-
dure 1) – 3).
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 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.
LIGHTNING SURGE PROTECTION
We offer a series of lightning surge protector for protec-
tion against induced lightning surges. Please contact us to
choose appropriate models.