KEYENCE MS2 User Manual

96M1274

Compact Switching Power Supply

MS2 Series

Instruction Manual

Read this manual before using the product in order to achieve maximum performance.
Keep this manual in a safe place after reading it so that it can be used at any time.

Part Names and Functions

Digital display window

.8.8.8

Safety Precautions

Displays the current values of output current/voltage and other items.

Display mode selection (MODE)

Switches the display mode.

Output voltage adjustment trimmer (V.ADJ)

Adjusts the output voltage within the range of ±5%.

DC output terminal (+, –) *
A load is connected here. (24 VDC)

Protective earthing terminal ( )

Connect to the protective earthing conductor in the building
installation.

AC input terminal (N, L)

An input cable is connected here. (100 to 240 VAC)

*Only the MS2-H300 has DC output of 4-terminal.

■ Precautions for UL Standards

The MS2 Series meets the following UL standards and has obtained UL and C-UL certification.

• Applicable standard UL508 Industrial Control Equipment

• UL File No. E195940, E242533

• UL category NMTR, NMTR7 / QQGQ2, QQGQ8

<Precautions>

• Use wires that meet the following conditions for the terminal block.

(tightening torque : 1.2 N·m)

Wire range AWG#14-22
Wire Material Copper wire only
Wire type Stranded wire only
Temperature rating 60ºC/75ºC

• The MS2 Series is designed as a Class I Equipment. Be sure to connect the protective earthing

terminal on the terminal block to the protective earthing conductor in the building installation.

• The MS2 Series is an open-type device. Be sure to install it in an appropriate enclosure rated as

IP54 or better.

• Use the MS2 Series according to the derating conditions and the installation conditions described in

this manual.

• The MS2 Series does not include a disconnecting device. Be sure to install a disconnecting device

such as a circuit breaker in the building installation wiring.

• The output of the MS2-H50 is rated Class 2 output specified in NFPA70 (NEC: National Electrical

Code) in the U.S.A. (UL Category: EPBU2/EPBU8)

UL60950-1 Information Technology Equipment - Safety
CAN/CSA C22.2 No. 14-M95

CAN/CSA C22.2 No. 60950-1-03

Industrial Control Equipment

Information Technology Equipment - Safety

Installation Conditions

■ Installation environment

• Installation this unit indoors.

• Do not install this unit in locations exposed to direct sunlight.

• Do not install this unit in locations in which there is corrosive gas or flammable gas.

• Do not install this unit in locations exposed to a lot of dust, soot, or steam.

• Do not install this unit in locations in which water, oil, or chemicals may splash onto the unit.

• When installing this unit in a location subject to vibration or impact, consider the vibration proof

mounting.

■ When installing this unit in a control console

• The ambient temperature for this unit should not exceed the upper temperature limit (refer to the

derating characteristic). When the upper temperature limit may be exceeded, install a cooling fan or
cooler so that the ambient temperature is below the upper temperature limit.

• Leave a sufficient ventilation space around this unit for head dissipation.

• Do not install this unit just above a device with high head generation (transformer, inverter, servo

amplifier, etc.).

•

Danger

Warning

Caution

Do not perform any electrical wiring while electric current is applied. Failure
to follow this may result in an electric shock or fire.

• Be sure to connect the grounding cable. Failure to follow this may result
in an electric shock or fire.

• Do not touch this unit within 1 minute after AC input is turned off. Failure
to follow this may result in an electric shock.

• Do not modify or repair this unit. Failure to follow this may result in an
electric shock, accident, or product failure.

• Do not touch any terminal of this unit while electric current is applied.
Use the unit with the terminal cover installed to avoid an electric shock.

• When this unit is used in a system that may cause a serious accident or
damage if the unit fails, be sure to install a safety device.

• Pay attention to prevent foreign matter such as metal particles, dust,
paper or wood chips from entering the inside of this unit. Failure to
follow this may result in a fire or product failure.

• Do not touch any metallic part while electric current is applied or
immediately after input is shut off. Failure to follow this may result in a
burn due to a high temperature.

• If a failure or abnormality occurs while this unit is in use, immediately
such off AC input and stop operation of this unit . Failure to follow this
may result in a fire or accident.

• Check that the AC input rated voltage of this unit is equal to the voltage
of the AC power supply.

• Do not connect the AC power supply to the DC output terminals.

• Do not disturb the convection of air near the vent of the casing.

■ Precautions for CE Markings

KEYENCE has evaluated the conformity of the MS2 Series with the requirements of the EMC
Directives and Low-voltage Directives under the following condition, and confirmed that the MS2
Series meets these requirements. For the Low-voltage Directives, the MS2 Series has obtained
certification from TUV Rheinland for the following standards.

<Precautions>

● EMC Directives (2004/108/EC)

• Applicable standard (EMI) EN55011, Group 1, Class A

• Applicable standard (EMS) EN61000-6-2

● Low-voltage Directives (2006/95/EC)

• Applicable standard EN60950-1

• Overvoltage category II

• Pollution degree 2

• The MS2 Series is designed as a Class I Equipment. Be sure to connect the protective earthing

terminal on the terminal block to the protective earthing conductor in the building installation.

• The MS2 Series is an open-type device. Be sure to install it in an appropriate enclosure rated as

IP54 or better.

• Use the MS2 Series according to the derating conditions and the installation conditions described in

this manual.

• The MS2 Series does not include a disconnecting device. Be sure to install a disconnecting device

such as a circuit breaker in the building installation wiring.

EN50178

Installation

■ Space around the unit

The MS2 Series uses natural air-cooling. To ensure sufficient convection of air to dissipate heat, provide
enough space between the MS2 Series and the control panel or other nearby devices as shown below.

MS2-H50/H75/H100/H150

20mm min.

20mm min.

20mm min.

20mm min.

MS2-H300

60mm min.

30mm min.

30mm min.

■ Installation orientation

Install this unit with the base A down as shown below. Do not install the unit in any other orientation.

■ Mounting bracket (optional)

Make sure that the tightening torque for the mounting screw holes of this unit is 0.5 N•m or less.

Wiring

Terminals

Screw size Tightening torque

M4 1.2 N•m

Crimp termianls

M4 size

8.0 mm max. 8.0 mm max.

M4 size

Cables

Select cables with a wire diameter suited to the output rated current.

1

30mm
min.

Method of Operation

10 to 57 Hz, 0.3 mm double-amplitude, 57 to 500 Hz, 19.6 m/s

(

±

The display mode changes each time when the MODE switch is pressed.

Output current display

Load factor display

Peak current display

.8.0.7

.3.5.P

.8.1.3

Displays the output current down to 0.1 A.

▼

Displays the load factor down to 1%.

°

When the load factor is over 100% , displays "FFP".

▼

Displays the maximum value of the output current down to

0.1 A. The current and "PH" are displayed alternately.

▼

Output voltage display

.2.4.0

Displays the output voltage down to 0.1 V.

• The MS2 Series is set to the output current display mode before shipment. It retains the display

mode that was used before the power was turned off.

• The maximum value for the peak current display mode is cleared when the power is turned off and

the display mode is changed.

• When the switch is held down for 3 seconds or more, the current mode is locked and cannot be

changed. To unlock the mode, hold down the switch again for 3 seconds or more.

Specificatons

Model
Rated Input voltage
Rated Frequency
Input current (100/200 VAC) 1.3 A/0.7 A max. 1.9 A/0.9 A max. 2.1 A/1.3A max. 2.2 3.9 A/1.8 A max.
Efficiency (100/200 VAC)
Leakage current

(100/200 VAC)

Input conditonsOutput conditonsProtectionDisplayEnvironmentApplicable standardOther

Rush current (100/200 VAC)

Rated output voltage
Adjustable voltage range
Rated output current 2.1 A(Class2) 3.2 A 4.5 A 12.5 A6.5 A
Ripple/noise voltage
Input fluctuation
Load fluctuation
Temperature fluctuation
Starting time
Output holding time

Overcurrent protection

Overvoltage protection

Display method
Memory backup time
Display resolution
Surrounding Air Temperature
(for operation)
Relative humidity
Surrounding Air Temperatur
(

for storage)

Withstand voltage

Shock

Vibration

Insulation resistance

Safety standard

EMC standard

Limits for harmonic current emissions

Parallel operation
Serial operation
Cooling method
Weight

∗1 For conforming to safety standards shown above, rated input voltage is 100 to 240 VAC 50/60 Hz.

∗2 To reset the unit, turn off the input power once, wait for 1 minute or more, and then turn on the input power again.

∗3 For MS2-H100, it is applied only when the load ratio is 70% or lower.

∗4 The Applicable standards do not apply for parallel and serial operations.

∗

1

∗

1

∗

2

MS2-H50 MS2-H75 MS2-H100 MS2-H150 MS2-H300

500 ms max. (at Surrounding Air Temperature of 0 to 55°C

2.7 A min. 4.0 A min. 5.3 A min. 7.9 15.6 A minA min.

e

Approx. 270 g Approx. 470g

100 to 240 VAC ( 85 to 264 VAC, 110 to 370 VDC)

50/60 Hz (47 to 63 Hz, DC )

82%/85% typ. (with 100% load)

0.4 mA/0.75 mA max. (with 100% load)

25 A/50 A max. (with 100% load, at 25°C cold start)

20 ms min. (at Surrounding Air Temperature of 25°C

Constant current voltage limiting. Automatic reset

Activates when the voltage reaches 26.4 V or more. Voltage turn-off.

Operation resumes when the input power is turned on again.

3-digit, 7-segment LED (Character height: 10 mm)

–10 to 55°C, No condensation (See "Output Derating Characteristics".)

3.0 kVAC 50/60 Hz 1 min (across input and output terminals),

2.0 kVAC 50/60 Hz 1min (across input erminals and PE erminal)

500 VAC 50/60 Hz 1 min (across output erminals and PE erminal)

Peak acceleration: 300 m/s

In X, Y, and Z directions, 2 hours respectively under the following conditions

100 MΩ min. (with 500 VDC megohmmeter) (across input and output terminals)

t t( t

(across input erminals and PE erminal) across output erminals and PE terminal)

C-UL : CSA C22.2 No.14-M95, CSA C22.2 No.60950-1-03

FCC Part15B ClassA, EN55011 ClassA, EN61000-6-2

24 VDC

5%(with V.ADJ)

180mVp-p max.

0.4 % max.

1.5 % max.

0.02 %/°C max.

Approx. 10 years (at 20°C)

0.1 A/0.1 V/1%

25 to 85%, No condensation

–20 to 70°C, No condensation

t t
t t

2

, in X, Y, and Z directions,

2 times respectively

UL : UL508, UL60950-1

EN : EN60950-1, EN50178

IEC : IEC60950-1

∗

3

EN61000-3-2

Possible (OP-42207 is required.)

Possible (External diode is required.)

Natural air-cooling

Approx. 490g Approx. 700g

A/1.1 A max.

under rated I/O

under rated I/O

2

2G , 5.5-minute ycle

∗

4

∗

4

conditions)

conditions)

) c

18 A/36 A max.

Approx. 1540g

Output Derating Characteristics

MS2-H50/H150 MS2-H75

100

90
80
70
60
50
40
30

Load factor (%) Load factor (%)

20
10

0

-10 0 10 20 30 40 50 7060

Surrounding air temperature (°C)

100

90
80
70
60
50
40
30

Load factor (%) Load factor (%)

20
10

0

-10 0 10 20 30 40 50 7060

Surrounding air temperature (°C)

Dimensions

(12)

A

10

C

D

3

B

Screw hole for mounting

Nominal diameter 3 Tapping depth 4 max.

Model A

B

99.5

40

MS2-H50

114.5

MS2-H75/H100

MS2-H150

Mounting bracket

Matching model

52

122.5

10

14.3

16.1

2.5

59

Screw hole for mounting

4-M3 Screw insertion depth 5 max.

When bottom mounted

E
B

OP-51625

MS2-H50

107.5

A

135

B

45

C

20 30 40

D

125 140 150

E

WARRANTIES AND DISCLAIMERS : KEYENCE, at its sole option, will refund,

repair or replace at no charge any defective Products within 1 year from the date
of shipment. Unless stated otherwise herein, the Products should not be used
internally in humans, for human transportation, as safety devices or fail-safe
systems. EXCEPT FOR THE FOREGOING, ALL EXPRESS, IMPLIED AND

STATUTORY WARRANTIES, INCLUDING WARRANTIES OF
MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
NONINFRINGEMENT OF PROPRIETARY RIGHTS, ARE EXPRESSLY
DISCLAIMED. KEYENCE SHALL NOT BE LIABLE FOR ANY DIRECT,
INDIRECT, INCIDENTAL, CONSEQUENTIAL OR OTHER DAMAGES, EVEN IF
DAMAGES RESULT FROM THE USE OF THE PRODUCTS IN ACCORDANCE
WITH ANY SUGGESTIONS OR INFORMATION PROVIDED BY KEYENCE. In

some jurisdictions, some of the foregoing warranty disclaimers or damage
limitations may not apply.

C

D

14.7

14.6

15.1

17.1

(12)

12.5

OP-51628

MS2-H75/H100

122.5
150

E
97

110

t=2

MS2-H150

E

F

H

65
78

A

CD

4-φ5

OP-42175

132.5
160

5554

G

35.9

15

27.5
I

J

F

G

H

I

33.4

40

5

41

52

4.75

120

85.5

60

MS2-H300MS2-H50/H75/H100

140

J

30

42.5

43.3

35.9

16.5

28

15.5

28

4-M3 Screw insertion depth 5 max.

When front mounted

D
C

Mounting bracket

Matching model

Two holes only for OP-51624.

When side mounted

t=2

B

Mounting bracket

Matching model

Two holes only for OP-51626.
The side mounting bracket can be attached to either sides.

(10)

124

P=10

16.8

70.5

2

Screw hole for mounting

A

F

E

4-φ5

OP-51624
MS2-H50

123.5

A

99

B

45

C
D 20 30

F 15

A

OP-51626
MS2-H50

120.5

A

45

B

65

C
D40

12.5E

F 14.5

8G

H

OP-51627

MS2-H75/H100

159.5
112

54

12.58E

E

OP-51629

MS2-H75/H100

153.5

54
75
50 50

16 20.5

15 15

131.5

96
78

B

OP-42174
MS2-H150

170
122

59
40

12.5
15

7

5

D
C

MS2-H150

157

60
75

12.512.5

12.512.5

E 1101-3

35.9

46.5

16.5

21.5

10

120

t=2

H

G

F

MS2-H100 MS2-H300

100

90
80
70
60
50
40
30
20
10

0

-10 0 10 20 30 40 50 7060

Surrounding air temperature (°C)

* The characteristic data shown above are obtained when this unit is installed as described in this

Manual.

100

90
80
70
60
50
40
30
20
10

0

-10 0 10 20 30 40 50 7060

Surrounding air temperature (°C)

* The surrounding air temperature is the temperature 50 mm below the bottom of the MS2 Series unit.

Copyright (c) 2004 KEYENCE CORPORATION. All rights reserved.

1274E 1033-3a 96M1274 Printed in Japan

2