M-system Mini-M M2PRU User manual

5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-5076 Rev.8 P. 1 / 4
INSTRUCTION MANUAL
Mini-M™
PULSE SCALER
(eld-congurable) MODEL M2PRU
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 (body + base socket).............................(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
■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 OR UL
• This equipment is suitable for Pollution Degree 2, Meas-
urement Category II (output, transient voltage 1500V)
and Installation Category II (transient voltage 2500V).
Reinforced insulation (signal input or output to power in-
put: 300V), basic insulation (signal input to output: 300V)
for the open collector or voltage pulse and reinforced insu-
lation (signal input to output: 300V) for AC/DC switch are
maintained. Prior to installation, check that the insula-
tion 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/UL requirements. Failure to observe these
requirements may invalidate the CE/UL conformance.
• The actual installation environments such as panel con-
figurations, connected devices, connected wires, may af-
fect the protection level of this unit when it is integrated
in a panel system. The user may have to review the CE
requirements in regard to the whole system and employ
additional protective measures to ensure the CE conform-
ity.
• 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. 4 – 6VA
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.
• The M2PRU’s output waveform is not uniform due to its
scaling method. The user must be aware that it may be
inconvenient for certain types of application.

M2PRU
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-5076 Rev.8 P. 2 / 4
■FILTER
• The M2PRU is designed to accept at the maximum of 100
kHz, which may cause errors due to chattering in the in-
put pulses.
A filter circuitry (time constant: approx. 1 msec.) is in-
corporated to eliminate unwanted chattering when the
mechanical contact input is specified. It is effective for
most relay types, however, an external CR filter as indi-
cated below, could be added if the user need improvement.
Limit the input frequency to 10 Hz at maximum.
C
+
‒
Relay
R
PULSE
SCALER
C = 100 µF
R = 100Ω
COMPONENT IDENTIFICATION
Model
Body Base Socket
Pulse Sensing
Type Selector
Connection
Diagram
Specifications
Fixing Screw
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.
■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)

M2PRU
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-5076 Rev.8 P. 3 / 4
■CONNECTION DIAGRAM
+
–
OUTPUT
9
12
U(+)
V(–)
POWER
13
14
+
–
INPUT
1
5
4
+
SENSOR EXCITATION
+
■Mechanical Contact
Open Collector
Input Connection Examples
+
–
–
PWR
■Voltage Pulse
• DC Coupled
+
+
–
–
PWR
■Open Collector
Output Connection Examples
+
–
9
12
+
–
(+)
(–)
9
12
■Voltage Pulse
+
–
9
12
+
–
■AC/DC SWITCH
12kΩ
24V
+
–
1
4
+5
+
–
1
4
+5
• Capacitor Coupled
+
+
–
–
PWR
+
–
1
4
+5
■2-Wire Current Pulse
• Built-in Excitation
1
5
4
–
+
Vsns
2-WIRE
PICK-UP
• External DC Supply
1
5
4
–
Vsns
2-WIRE
PICK-UP +
+
DC SUPPLY
–
200Ω
200Ω
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)

M2PRU
5-2-55, Minamitsumori, Nishinari-ku, Osaka 557-0063 JAPAN
Phone: [phone] Fax: [phone] E-mail: [e-mail]
EM-5076 Rev.8 P. 4 / 4
ADJUSTMENT PROCEDURE
Scaling Factor
Pulse Width Adj.
Pulse Width
Range Selector
*Settings 7 through 9 are invalid.
No pulse output with these settings.
The front cover cannot be opened to 180 deg.
when flush with neighboring units.
■ FRONT VIEW (with cover open) ■ RIGHT SIDE VIEW
Pulse Sensing Type Selector
DC
AC
: DC coupling
: Capacitor coupling
DC
AC
(A) 10–1
(B) 10–2
(C) 10–3
(D) 10–4
(E) 10–n*
■SCALING FACTOR
Positions for the rotary switches 10–1 through 10–n apply re-
spectively to each digit of the decimals and exponential as
shown below.
Output Rate = Input Rate × 0. (A)(B)(C)(D) × 10– (E)
where the scaling factor is adjustable from
1.0000 × 100thr. 0.0001 × 10–6
[Examples]
Scaling factor 0.1440:
(A) = 1, (B) = 4, (C) = 4, (D) = 0, (E) = 0
Scaling factor 1.0000 is special:
(A) = 0, (B) = 0, (C) = 0, (D) = 0
■PULSE WIDTH
Factory adjusted to a suitable value. Use only when the
output device (counter) is not able to read the output pulses.
Min. 400 µsec. recommended for AC/DC switch output of
which the internal voltage drop value may increase with a
shorter pulse width.
OFFH
ONL
OUTPUT TYPE
Bold section of
the waveform
is adjustable.
VOLTAGE
PULSE
OPEN COLLECTOR
AC/DC SWITCH
■PULSE WIDTH RANGE
Selects adjustable range of the output pulse width.
L (Left) : Approx. 0.2 – 10 msec.
CTR (Center) : Approx. 5 – 200 µsec.
R (Right) : Approx. 10 – 400 msec.
■PULSE SENSING TYPE
Provided only when the voltage pulse input is selected. Fac-
tory set to ‘DC coupling.’
When the DC offset is too large to detect by DC coupling,
switch to ‘Capacitor coupling.’
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: Measure the signal between input terminals 1 (+)
and 4 (–) with an oscilloscope.
With voltage pulse input, the signal should be below 1 V
at L level, while it should exceed 2 V at H level.
4) Output: Check that the load resistance meets the de-
scribed specifications.
LIGHTNING SURGE PROTECTION
M-System offers a series of lightning surge protector for
protection against induced lightning surges. Please contact
M-System to choose appropriate models.