DMS-PS-CM Series
High Efficiency, AC/DC Instrumentation Power
Supplies with Individually Isolated Outputs
Unive
rsal
Universal
Input
e
OBSOLETE PRODUCT
Contact Factory for Replacement Model
FEATURES
Up to 80% efficient single, dual, and triple-
output model
Individual, fully-isolated outputs:
3000Vac on main
4000V double-isolation on auxiliaries
Available with +5V, +12V, and +24V outputs
Low noise: 40mVp-pk on main, 8mVp-pk on
auxiliaries; Ideal for sensitive instrumentation
Universal input: 85-264Vac @ 47-63Hz or
110-340Vdc
Choice of 5, 10, or 16W models for minimal
system power-consumption
Standby power consumption as low as 0.6W
Short-circuit protection on all outputs;
OVP on main output
Built-in ac mains fuse & ‘Power On’ indicator
5W models operate up to 5 LED-display DPM’s
Vibration-resistant, chassis-mount
modular packages
EMC compliant; UL/CSA recognized
Low cost!
C
®
8
5-264Vac
o
r
110-340
Vdc
85-264Vac or 110-340Vdc
0
US E156931
Murata Power Solution’s DMS-PS-CM Series
of high-efficiency, chassis mount AC/DC
power supplies feature low noise (40mV on
main, 8mV on auxiliaries), fully-isolated +24,
+12V, and +5V outputs, making them perfect
for powering today’s complex instrumenta-
tion. A high-current main output is isolated
from the AC line by 3000Vac. In dual- and
triple-output models, the low-current auxiliary
outputs are isolated from the main output by
1000Vdc, and from each other by 2000Vdc,
effectively providing double isolation from the
AC line! This unprecedented isolation elimi-
nates ground loop problems in complex,
multiple-instrument applications.
Full-load efficiencies of up to 80% and
output-power ratings of 5, 10 or 16 Watts,
combine to ensure minimal ac power con-
sumption. For intermittent use or low-power
applications, the 5-Watt model’s no-load
quiescent consumption with a nominal
120Vac input is a mere 0.6 Watts---that’s
nearly seven times less than a standard 4W
night light! These low cost, high-efficiency
power supplies can significantly reduce
long-term electricity costs in low (<5Watts)
to medium (<16Watts) power applications.
All DMS-PSX-CM power supplies fea-
ture universal inputs of 85-264Vac 50/60Hz,
built-in line fuses, and on-board ‘Power On’
LED indicators. At full rated load, hold-up
time is typically 20ms at 120Vac, and 80ms
at 230Vac. All outputs provide indefinite
short-circuit protection and, for added reli-
ability, the main high-current output also
includes overvoltage protection. A rugged,
vibration-proof, chassis mount package
incorporates large, shock-resistant terminal
blocks for all I/O connections.
Multiple outputs, low noise, low cost,
high efficiency, double isolation, and rugged
construction combine to make DMS-PSX-
CM Series AC/DC power supplies the
ideal choice for powering today’s sensitive
instrumentation, and any electronic device
that requires a reliable dc voltage!
DC/DC
**
Converter
+
–
DC/DC
**
Converter
AC(L)
TB4
F1
1A/250V
AC/DC Converter
+
–
AC(N)
+
+
–
+
+
–
LDO
Regulator
IN
OUT
GND
TB3
+
+
V3 (Auxilliary)
–
LDO
Regulator
IN
OUT
GND
TB2
+
+
V2 (Auxilliary)
–
85-264V
50/60Hz
or
or
110-340Vdc
110-340Vdc
*
FG
Drive
Circuitry
+
+
TB1
+
V1 (Main)
–
*
Not used on single-output models
**
Used only on dual and triple-output models
For full details go to
www.murata-ps.com/rohs
Figure 1. Simplified Schematic
Figure 1. DMS-PS-CM Series Simplified Schematic
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MPM_DMS-PS-CM.B02
Page 1 of 8
DMS-PS-CM Series
High Efficiency, AC/DC Instrumentation Power
Supplies with Individually Isolated Outputs
Performance/Functional Specifications
Typical at T
A
= +25°C and V
IN
= 85-264V @47-63Hz
AC Input
Input Voltage Range, All models
Input Current
(115V/230V, typ.):
5-Watt Models
10-Watt Models
16-Watt Models
Inrush Current
(All models, typical peak):
@115Vac
@230Vac
Isolation
(Min.):
Output V1 to AC Input
Outputs V2 & V3 to AC Input
AC Input to Frame Ground
Output V1 to Frame Ground
Outputs V2 & V3 to Frame Ground
Outputs V2 & V3 to Output V1
Output V2 to Output V3
Frame Ground Leakage Current
(Max.):
@115Vac
@230Vac
Switching Frequency
(Typical):
V1
(5W and 10W models)
V1
(16W models)
V2 & V3
(All models)
Line Fuse
(Built-in)
IEC60127-2, sheet 3 specification
(slow-blow)
AC Mains Terminal Block
(TB4):
Wire Size & Type
Insulation Strip Length
Screw Tightening Torque
Rated Voltage
250V (VDE 0110-V. Group 3)
EMI
(All models)
Class B
Safety Approvals
DC Outputs
Line Regulation
(All outputs)
Load Regulation:
V1
(All models)
V2 & V3
(All models)
Output Accuracy
(Max.):
V1
(All models)
V2 & V3
(All models)
Hold-Up Time
(47-63Hz):
@115Vac
@230Vac
Noise & Ripple
(All models, 20MHz bandwidth):
V1
V2 & V3
Transient Response
DC Outputs
(continued)
Efficiency
(Typ.@ 120Vac, full load):
Single Output Models
Dual Output Models
Triple Output Models
85-264V @47-63Hz
0.15A/0.07A
0.3A/0.13A
0.33A/0.16A
14.1A
32.5A
3000Vac
3000Vac + 1000Vdc
1500Vac
500Vac
500Vac + 1000Vdc
1000Vdc
2000Vdc
0.5mA
3.5mA
75kHz
83kHz
100kHz
1A/250Vac, 5 x 20mm, meeting
for time lag fuses
75%
73%
71%
DC-Output Terminal Blocks
(TB1, TB2, TB3):
Wire Size &Type
16-20AWG (1.5 to 0.5mm
2
),
solid or stranded
Insulation Strip Length
0.25 inches (6.4mm)
Screw Tightening Torque
3.6 pound-inches (0.4Nm)
Short Circuit Protection
(All outputs)
Overvoltage Protection V1
(max.)
Environmental
Operating Temperature
–25 to +70°C @ 50% rated power
Storage Temperature
Cooling
Notes)
Humidity
(Non-condensing)
Physical
Dimensions
Weight:
5 Watt Models
10 Watt Models
16 Watt Models
Case Materials:
Outer Case
DC/DC Modules
AC/DC Modules
0 to 85%
Foldback, self-recovering
134% x Vout
0 to +50°C @ full rated power;
(see Figure 3)
–40 to +85°C
Free air convection with derating
(see Figure 3 and Technical
See Mechanical Specifications
5.8 ounces (165 grams)
6.9 ounces (195 grams)
7.9 ounces (223 grams)
ABS, UL94 5VA
Phenolic, UL94 V-0
Plastic, UL94 V-1
14-20AWG (2.5 to 0.5mm
2
),
solid or stranded
0.25 inches (6.4mm)
4.4 pound-inches (0.5Nm)
630V (VDE 0110-V. Group 2);
Meets CISPR Pub. 22 & FCC
Pending
All models will also operate from a regulated and filtered 110 to 340Vdc input.
Unless otherwise specified, load regulation is measured with the output under
test undergoing a load change of 100% to 50% at nominal line input and,
when applicable, with all other outputs operating at 50% of rated load.
Transient response is defined as the output returning to within its specified
tolerance in 10ms or less, following a 90% load change.
±0.1% (max)
±2%
±0.2% (max)
±2.0%
±2.5%
20mSec. typ.
80mSec. typ.
See Noise & Ripple graphs
40mVp-pk (typ.)
8mVp-pk (typ.)
See Transient Response graphs
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MPM_DMS-PS-CM.B02
Page 2 of 8
DMS-PS-CM Series
High Efficiency, AC/DC Instrumentation Power
Supplies with Individually Isolated Outputs
Ordering Information and Selection Guide
MPS Part No.
DMS-PS1-CM
DMS-PS2-CM
DMS-PS3-CM
DMS-PS4-CM
DMS-PS5-CM
DMS-PS6-CM
DMS-PS7-CM
DMS-PS8-CM
DMS-PS9-CM
DMS-PS10-CM
Efficiency typical @120V/60Hz
Rated Power
5 Watts
5 Watts
5 Watts
10 Watts
10 Watts
10 Watts
16 Watts
16 Watts
16 Watts
16 Watts
Efficiency
75%
73%
71%
80%
75%
73%
82%
76%
74%
82%
V1 Output
5Vdc/1A
5Vdc/0.65A
5Vdc/0.35A
24Vdc/0.45A
24Vdc/0.35A
24Vdc/0.30A
24Vdc/0.70A
24Vdc/0.60A
24Vdc/0.55A
12Vdc/1.35A
V2 Output
—
4.85Vdc/0.2A
4.85Vdc/0.2A
—
4.85Vdc/0.2A
4.85Vdc/0.2A
—
4.85Vdc/0.2A
4.85Vdc/0.2A
—
V3 Output
—
—
4.85Vdc/0.2A
—
—
4.85Vdc/0.2A
—
—
4.85Vdc/0.2A
—
TECHNICAL NOTES
IMPORTANT! To ensure safe and reliable operation, DMS-PS-CM
power supplies must be installed and serviced by qualified
personnel. Contact Murata Power Solutions if there is any doubt
regarding their installation and/or operation. Please read all of the
following technical and application notes BEFORE installing or
making connections to DMS-PS-CM power supplies.
Warnings
(Marking)
Caution, unit may become hot in normal operation, thereby creat-
ing a potential burn hazard. Disconnect ac mains and then allow
unit to cool before servicing.
Reference document: IEC 417, No. 5041.
Dangerous, potentially lethal voltages are present during normal
operation. Disconnect ac mains before servicing.
Reference document: IEC 417, No. 5036.
3. Fuse Replacement:
If any dc-output drops to zero volts, and no fault
conditions exist within the external load circuitry or the ac mains, F1 may
have failed. F1 is located on the circuit (etch) side of the pc-board. Fuse
replacement is performed by first de-energizing and then disconnecting
the ac mains from TB4. Next, disconnect all load wiring from TB1, TB2,
and TB3. Lastly, remove the four screws that secure the pc-board to the
plastic case. After making sure that the new fuse is securely attached to its
mounting clips, re-assemble the unit using all four screws. Reconnect all
input and output wiring and re-apply ac power.
If the unit still does not operate properly, and the ac supply at TB4 is
measured to be within its specified operating range, the power supply
is defective and must be replaced. Except for F1, DMS-PS-CM supplies
contain no other user-serviceable components.
4. Wire Gauges and Fusing:
All wiring connected to the DMS-PS-CM’s
terminal blocks must meet the requirements specified in the Functional
Specifications section. All ac supply and load wiring must be rated for the
voltages and currents they will conduct and must comply with any code
or application-mandated requirements pertaining to the user’s specific
installation. Applications subject to vibration should include adequate strain
reliefs on both input and output wiring. Install the strain reliefs within 2-3
inches (5-7.5cm) of the terminal blocks.
It is recommended that all wiring be rated for 600V and 105°C operation
(UL1015 type, for example). Also, wire insulation must be stripped to within
±10% of the dimensions shown in Figure 2. All wires must be inserted
into their respective terminal blocks such that the screw terminal does not
pinch their insulation.
No more than two wires should be connected to
any single terminal on TB1 through TB4.
If two wires are attached to a
single terminal, be sure to use only two 20AWG (0.5mm
2
) wires on TB1,
TB2, and TB3, and only two 18 or 20AWG (0.75 or 0.5mm
2
) wires on TB4.
Caution, refer to accompanying documents for more informa-
tion. Reference document: ISO 3864, No. B.3.1.
1. Shock Hazard:
DMS-PS-CM Series power supplies feature touch-proof
terminals blocks and fully-isolated plastic construction, thereby greatly reduc-
ing the risk of electrical shock. However, these are mains-powered devices
whose operation is derived from hazardous and potentially lethal voltages.
All service and installation must be performed by qualified personnel, with
the ac supply voltage de-energized. Before making connections to any of
the unit’s terminal blocks, use a digital voltmeter to verify that the ac supply is
de-energized (off).
2. AC Supply Fuse (F1):
All DMS-PS-CM Series power supplies are equipped
with a built-in 1A/250V time-lag fuse. Replacement fuses must be of the
same type and rating; please refer to the Functional Specifications section
of this datasheet for more information. F1 is conservatively rated in order
to reduce nuisance tripping which might occur during power-up or output
overload conditions. However, F1 is primarily intended to provide protection in
the event of catastrophic failure in the DMS-PS-CM’s ac/dc converter.
0.25"
(6.4mm)
Figure 2. Insulation Strip Length
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
www.murata-ps.com
MPM_DMS-PS-CM.B02
Page 3 of 8
DMS-PS-CM Series
High Efficiency, AC/DC Instrumentation Power
Supplies with Individually Isolated Outputs
The ac-mains circuit supplying power to DMS-PS-CM supplies must be fused
according to the current rating of the wire gauge used, in accordance with
applicable regulatory codes. The built-in 1ampere line fuse (F1) only protects
the module itself from destructive over currents.
5. AC Mains Connections (TB4):
To ensure EMI-compliant operation, all three
ac-supply inputs must be properly connected to TB4. Never operate any DMS-
PS-CM power supply without a ground connection to TB4’s ‘FG’ terminal.
On 120Vac 50/60Hz mains, connect the black or "hot" lead to ‘AC(L)’, the
white or “neutral” lead to ‘AC(N)’, and the supply ground (earth) to ‘FG’ (Frame
Ground). On 220V 50/60Hz ac mains with line and neutral conductor-designa-
tions, connect the line to AC(L), the neutral to AC(N), and the ground to ‘FG’.
6. Connector Torque Ratings:
It is extremely important to tighten all input and
output terminal blocks securely. TB4’s screw terminals must be torqued to
4.4 pound-inches (0.5Nm). TB1, TB2, and TB3 must be torqued to 3.6 pound-
inches (0.4Nm). Proper tightening will minimize losses and ensure safe,
reliable operation.
7. ‘Power On’ LED:
The Power On LED indicates that the unit has ac-power
applied and its V1 dc-output is operational. However, the power-on LED’s
illumination does not imply nor guarantee that the unit’s dc-outputs are within
their specified accuracy.
8. Output Adjustment:
The main output, V1, on all 5, 10, and 16W models is
adjustable by approximately –10% to +15%. V1’s adjustment potentiometer
is accessed via a small hole located next to the Power-On LED. While not
recommended, field adjustment of single-output models can be performed
within the tolerance window noted above. However, keep in mind that the
unit’s maximum output power capability must not be exceeded. For example,
increasing V1’s output voltage by 10% produces a corresponding 10% reduc-
tion in V1’s maximum output current.
On dual-and triple-output units, V1 is factory calibrated with all outputs
simultaneously loaded to 100% of their rated current. On all dual- and
triple output models, adjusting V1 under any condition other than
those just noted (i.e., all outputs loaded to their full rated current) will
2.0% / ºC
100
adversely affect the operation and stability of auxiliary outputs V2 and
V3. On these models, V1 must be adjusted to within ±2 % of its nominal
value (+5.0V, +12.0V, or +24.0V, depending on model).
9. Temperature Derating (See Figure 3):
All DMS-PS-CM supplies are speci-
fied to operate at their full rated power over the temp range of 0°C to +50°C
in still air (convection cooling) without any thermal derating. For operation
over +50°C in still air, derate the output power linearly by 2.5% per °C down
to 50% rated power at +70°C. To operate the units at full rated power between
+50°C and +70°C, a minimum forced-airflow of 100 LFM is required. For
operation below 0°C, derate the output power linearly by 2.0% per °C down
to 50% rated power at –25°C.
Unless forced air with the velocity noted above is employed, DMS-PS-CM
supplies should never be mounted upside down (terminal blocks facing
down). Also, always provide sufficient clearances in order to ensure adequate
airflow around the supply.
10. V1 Peak Capabilities:
DMS-PS-CM power supplies have a maximum
continuous output-current rating that’s specified in the Ordering and Selection
Guide. In addition, each model’s V1 output can intermittently supply 120% of
its continuous rated current for short periods of time if the duty cycle is less
than 10%. Peak current ratings do not apply to the auxiliary outputs V2 or V3.
11. Isolated Outputs:
Unlike the majority of competitive ac/dc power supplies,
all dual- and triple-output DMS-PS-CM power supplies feature fully-isolated
outputs. This is an important feature when, for reasons of high common mode
voltages, an instrument’s input circuit must be isolated from the system ground.
All V1 outputs are isolated from the ac mains by a minimum of 3000Vac, while
auxiliary outputs V2 and V3 are isolated from one another by 2000Vdc, and
fromV1 by 1000Vdc. The low noise, double-isolated auxiliaries are ideal for
powering sensitive instrumentation that requires low ac leakage-currents.
All ac/dc and dc/dc power components utilized in the construction of DMS-
PS-CM power supplies are 100% hi-pot tested during their manufacturing pro-
cesses. In addition, after final assembly by MPS, all models are subjected to an
additional hi-pot testing consisting of 1000Vac sequentially applied between the
ac mains input and each output, and between each output and all other outputs.
75
Output Power (%)
2.5% / ºC
50
70ºC
25
0
–25
–10
0
10
15
20
25
30
35
40
45
50
55
60
65
70
75
Figure 3. Temperature Derating
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MPM_DMS-PS-CM.B02
Page 4 of 8
DMS-PS-CM Series
High Efficiency, AC/DC Instrumentation Power
Supplies with Individually Isolated Outputs
Application Information
1. Chassis Mounting Considerations:
In order to minimize self-heating,
DMS-PS-CM power supplies should always be mounted in either a
vertical or horizontal position. Avoid mounting units upside-down or in
close proximity to other heat-generating devices. Also, be sure to use
the mounting hardware described in Figure 4 below in order to ensure
a secure, vibration-resistant installation.
3. Model Selection & Energy Conservation:
In order to achieve the lowest
possible energy consumption, be sure to determine your application’s total
current requirements. This is especially true when using DMS-PS-CM
supplies to power DATEL’s energy-efficient LED and/or LCD display digital
panel meters (DPMs) and process monitors. In general, choose a power
supply that will accommodate your maximum current consumption plus a
20% margin. Choosing the lowest-wattage model suitable for a given appli-
cation will provide lower procurement costs and lower long-term operating
costs.
When calculating total current requirements in installations employing
three or more DMS-Series meters, it is acceptable practice to use each
meter’s typical current consumption rating. However, be sure to consult
the relevant product datasheets for all instrumentation comprising your
application.
For applications where DMS-PS-CM power supplies will be powering only
Murata Power Solution’s DPM’s, a 5-Watt DMS-PS3-CM can power up
to four, standard intensity (‘-RS’ suffix) red-LED DMS-30PC meters: two
meters on V1, and one meter each on V2 and V3. The same DMS-PS3-CM
could also be used to power over 40 low-power red DMS-30PC meters
(‘-RL’ suffix), or over 800 DMS-30LCD non-backlit meters! Of course, these
statements are made without regard to ground-loop problems that may be
encountered when powering 800 DPM’s from a single power supply.
Screw,
Split Lock Washer,
Flat Washer
Panel/Chassis
Threaded
Hole
Screw,
Flat Washer
Panel/Chassis
Hole
Flat Washer,
Split Lock Washer,
Nut
Figure 4. Chassis Mounting
2. Bipolar Operation (See Figure 5):
DMS-PS-CM power supplies’ fully
isolated outputs allow for the generation of bipolar (positive and nega-
tive) supply voltages. Bipolar outputs can be used to power dual-supply
operational amplifiers, as well as any other type of instrumentation that
requires bipolar supply voltages. However, please keep in mind that
when connecting and operating any two outputs in this fashion, each
output retains its maximum current rating.
DMS-PS6-CM
–
V1
+
–
V2
+
–
V3
+
Scope Probe
Oscilloscope
V1
–
+
BW = 20MHz
DMS-PS-CM
Figure 6. Measuring Ripple and Noise
+24V
COM
–5V
+5V
Figure 5. Bipolar Connections
www.murata-ps.com
Technical enquiries
email: sales@murata-ps.com, tel:
+1 508 339 3000
MPM_DMS-PS-CM.B02
Page 5 of 8
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