Optimal Power OPR Power Series User manual

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OPR Power Series™
AC to DC POWER SUPPLY SERIES WITH RELAY CLOSE CONTACT
REMOTE MANAGEMENT ALARM SYSTEM
Model No. OPR300-24SN
(Negative) –24V, 300 Watt Single Power Supply
Manual
Revision E
August 2009
Optimal Power Supplies LLC
www.optimal-power.com

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PROPRIETARY DATA
All data in this manual is proprietary and may not be disclosed, duplicated or used for
procurement or manufacturing purposes, without prior written permission by
OPTIMAL POWER
LIABILITY
DO NOT OPERATE OR SERVICE THE OPR300-24SN MODEL WITHOUT READING THIS
ENTIRE MANUAL FIRST
Optimal Power Supplies LLC is not responsible for any kinds of damages sustained through the
use of this or any other Optimal Power Supplies LLC products. It is entirely the customer’s
responsibility to take all the necessary precautionary measures when installing this unit.
WARRANTY
Optimal Power warrants all of its products against defects in materials and workmanship for one
year from date of delivery. We will repair, or replace parts which prove to be defective during
the warranty period provided that:
1. A Return Maintenance Authorization (RMA) is obtained from OPTIMAL POWER at
[phone] or www.optimal-power.com.Please reference your RMA number on the
outside of the box the item is shipped in.
2. Shipping charges are pre-paid by customer.
Optimal Power does not endorse any other warranty, expressed or implied, and is not liable for
consequential damages. Products that are damaged, opened, or modified do not qualify for a
warranty. The same procedures must be followed for repairs outside the warranty period.

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CHAPTER TITLE PAGE
1 OPR Power Series – Introduction …………………………........................ 1
1.1 Product Description………………………………………………………….. 1
1.2 Main Features………………………………………………………………… 1
1.3 General OPR Power Series Specifications…………………………………... 2
1.4 Typical Safety Rating………………………………..………………………. 2
2 OPR300-24SN……………..………………………………………………... 3
2.1 OPR300-24SN Description………………….………………………………. 3
2.2 Specifications ………………………………………………………………... 3
3 Status Indicators and Back Panel Connections…………………………… 5
3.1 Back Panel DC Power Connector……………………………………………. 5
3.2 Front Panel Status Indicators…………………………………........................ 5
3.3 Remote Management Terminal Block Pin Out……………………………. 5
4 Alarm Systems…………..…………………………………………………... 6
4.1 Alarm Monitoring System…………………………………………………… 6
4.1.1 Alarm Monitoring System Example…………………………………………. 7
5 Installation and Maintenance………………………………........................ 8
5.1 Installation………………………………………………………………….... 8
5.2 Maintenance…………………………………………………………………. 9
5.3 Warnings………………………………………………………...................... 9
6 Images….…………………………………………………………………… 10
6.1 OPR300-24SN.…………………….…………………………...................... 10
6.2 OPR300-24SN (Front View/Rear View)……………………………………. 11
6.3 DC Cable Image………………………………………………........................ 12
TABLE OF CONTENTS

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Chapter 1
OPR Power Series - Introduction
1.1 Product Description
OPR Power Series is a unique and a highly reliable power supply series. It can be configured as a
single as well as a fully redundant power supply. OPR Power Series is designed for Universal
AC to DC power supply applications. Because of this feature these power supplies can be used
anywhere in the world. These power supplies are mainly used in the following applications:
•Computer Peripherals and Networking Applications
•Telecommunications and Fiber Optic Network
•Voice, Data and Analog Communications
•Universities and Educational Facilities
•Instrumentation and Electronics
•Utility and Power Industries
•Data Acquisition
•Medical
•Military
OPR Power Series is a reliable, efficient and inexpensive solution for all kind of AC to DC
power supply applications.
1.2 Main Features:
•Compact Rack Mount Size (1.75” H x 19” W x 12.12” D)
•Universal AC (Alternate Current) Input
•Filtered IEC AC Inlet Connectors
•EMI FCC Class B Clearance for Internal Power Bricks
•Single and Multiple Output
•Highly Efficient Design
•1U Low Profile Height
•NO Minimum Load Required
•Relay Contact Closure Remote Management
•Low Voltage Power Supply Alarm
•Cost Effective and Reliable Power Supply Solution

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1.3 General OPR Power Series Specifications:
Input Voltage………………………………...Universal 90VAC to 264VAC
Input Frequency……………………………...47Hz to 63Hz
Operational Temperature………………….…0°C to 55°C
Storage Temperature………………………..-20°C to 85°C
Cooling………………………………………Convection Cooling
Overload Protection………………………....Auto-Recovery
Efficiency…………………………………....80-90% Typical
DC OK………………………………………Status LEDs
1.4 Typical Safety Rating for Internal Power Modules:
Designed in full compliance with……...……UL60950
CSA 22.2 No. 234
EN60950
EMI………………………………..………...EN55022 “Class B”
EMS…………………………………………EN61000-4-2,-3,-4,-5,-6,-8,-11
Harmonics……………………………..….....EN61000-3-2 Class D
1U Power Supply
Shown above: Model OPR300-24SN

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Chapter 2
OPR300-24SN
2.1 OPR300-24SN Description:
The Model OPR300-24SN is a 1U rack mountable power supply designed to operate in
(negative) –24V, 300W power configuration. OPR300-24SN has one built-in universal AC to
–24V DC power supply with one IEC AC input socket. The OPR300-24SN Model can provide
up to 300W of power to the system it is attached. Model OPR300-24SN is only designed for
300W applications. The internal power module has its own AC-INLET, ON/OFF switch and
associated alarm and DC power LED. OPR300-24SN Model has a built-in alarm circuit with red
LED for low DC power monitoring. In addition, Model OPR300-24SN has relay contact closure
terminal block interface for remote power supply alarm management.
2.2 Specifications:
Electrical
Output Voltage –24VDC
Output Ripple Typical 200 mV
Output Current Typical 12A max
Output Power 300W of single power
Input Voltage Universal 90VAC to 264VAC input
Input Frequency 47Hz to 63Hz
Input Current Approx. continuous 3 Amps.
Current Tolerance 0.5%
Remote Management Interface Terminal block connector Pins 2 and 3 (Relay contact closure)
Typical Safety Ratings for Internal Power Modules:
Designed in full compliance with UL60950
CSA 22.2 No. 234
EN60950
EMI EN55022 “Class B”
EMS EN61000-4-2,-3,-4,-5,-6,-8,-11
Harmonics EN61000-3-2 Class D

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Environmental
Overload Protection Auto-recovery
Functional Temperature 0 to 70 °C
Storage Temperature -20 to 85 °C
Over voltage Type Latch off
Efficiency 80-90% Typical
Physical
Dimensions 1U (1.75” H x 19” W x 12.12” D)
Weight Approx. 13.25 lb = 6.01 kg = 212 oz
Dimentional Figure

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Chapter 3
Status Indicators and Back Panel Connections
3.1 Back Panel DC Power Connector
3.2 Front Panel Status Indicators
LED Description (When Lit) OPR300-24SN Indicators
Solid Green Power Supply Activated Power 1
Solid Red Power Supply Failure PS 1 Alarm
3.3 Remote Management Terminal Block Pin Out**
Relay Contact Closure Normal Operating Condition Alarm Condition / Off Position
Pin # 2 Open Circuit Short Circuit (Shorted to pin 3)
Pin # 3 Open Circuit Short Circuit (Shorted to pin 2)
Note ** Pins not mentioned in the table do not have any connections
To understand the power and data alarm systems, please refer to the section 4.1 on next page.
–24V
–24V
–24V
–24V
0V
0V
0V
0V
WARNING:
Observe polarit
y
when makin
g
connection to the rear of the
Model OPR300-24SN
NC
1 2 3 4

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Chapter 4
Alarm Systems
4.1 Alarm Monitoring System
The Model OPR300-24SN has the ability to monitor output DC voltage, and trigger an alarm
when the output DC voltage starts to fail or the internal power brick is turned OFF. If for some
reason the power supply voltage drops (due to overload or front panel switch in OFF position),
the relay contact closure terminal block interface pins 2 and 3 are shorted together indicating
power supply failure. The contact closure is rated for 120VAC/30VDC @ 2A maximum.
Furthermore, there is also “PS 1 Alarm” LED associated with the internal power supply
indicating output power failure status. The alarm conditions are summarized as follow:
Refer to next the page for an alarm monitoring system example.
Alarm Conditions
•Power Failure
•AC plug disconnected to the Power Supply
•Front panel power switch is in “OFF” position

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4.1.1 Alarm Monitoring System Example
Alarm or Fault Condition
Normall
y
Closed
The relay contact closure is rated for 120VAC/30VDC @ 3A maximum
Power Supply Brick
(Active)
Alarm Monitoring
Logic Circuit
Pin 2 Pin 3
Terminal
Block
Normal Operating Condition
–24VDC Out
Power Supply Brick
(Failed/Turned OFF)
Alarm Monitoring
Logic Circuit
Pin 2 Pin 3
Terminal
Block
No Output

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Chapter 5
Installation and Maintenance
5.1 Installation
Model OPR300-24SN may be installed in fixed, semi-fixed and mobile environments that meet
the environmental characteristics specified in Chapter 2. This Model is designed to be mounted
in a standard 19” equipment rack utilizing the mounting holes provided on the front of the unit.
It is recommended that at least 1 rack unit (1U = 1.75”) gap be provided above or below the
OPR power supply unit for proper air flow.
Once the power supply is mounted in the rack, it should be connected to the system (that only
requires –24VDC power) with the DC output connector located at the rear of the OPR unit.
¾Next, ensure that the front panel power switch is in “OFF” position.
¾Connect the AC power cord to the unit by plugging the free end of the power cord into a
standard three prong AC outlet.
¾Ensure that the AC power plug located at the rear end of the power supply is connected to
a clean and well-grounded Universal AC source.
Once all the wires are connected properly:
Turn “ON” the front panel switch for the power supply
The “Power 1” green LED should light up. Indicating Power supply is “ON” and working
properly
Now the system is ready to operate to its required purpose.
Monitoring AC Input and DC Output
OPR Series Models has a switch that monitors AC current input and DC current output.
Whenever the “Power” switch is “ON”, the LED embedded in the switch should light up. This
indicates good AC input. Similarly the “Power 1” LED should turn green, indicating good DC
output current.
WARNING: Observe polarity when making connection to the rear of
Model OP
R
300-24SN

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5.2 Maintenance
The Model OPR300-24SN should be treated with the sufficient care.
•Do not use abrasives or solvents, as they may mar surfaces
•Do not subject the unit to excessive temperature extremes
•Do not subject the unit to excessive moisture or spilled liquids
•Do not subject the unit to sudden or severe shocks
•Never operate the Model OPR300-24SN with any of the covers removed
5.3 Warnings
To reduce the risk of fire, electric shock or product damage, DO NOT expose the Model
OPR300-24SN to direct heat, rain, moisture, dripping or splashing. DO NOT place any object
filled with any kinds of liquids on the unit. To prevent damage to LEDs and switches, DO NOT
place the front panel of the unit face down, and/or DO NOT press against the front panel.
Optimal Power Supplies LLC is not responsible for any kinds of damages sustained through the
use of any of its products.

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Chapter 6
Images
6.1 OPR300-24SN (300W Single Power Supply Shown Here)
Front View
Rear View
Overall View

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19
”
Power 1
PS 1 Alarm
6.2 OPR300-24SN (Front View/Rear View)
LED Description (When Lit) OPR300-24SN Indicators
Solid Green Power Supply Activated Power 1
Solid Red Power Supply Failure (or)
Power 1 Switch is in OFF position PS 1 Alarm
AC Input
Power
Three Cooling Ducts Relay Contact Closure
Terminal Block
Remote Management
Pin 2 = Contact Closure
Pin 3 = Contact Closure
120VAC or 30VDC @ 3A
Ground −24VDC
1
7
”
NC
1 2 3 4

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6.3 DC Connection Cable
Important:For proper current flow make sure to connect all the specified power terminals
–V
–V
–V
–V
0V
0V
0V
0V
Red = Negative Lead = –24V
Black = Positive Lead = 0V
16 AWG Wire Required
WARNING:
Observe polarit
y
when
making connection to
the rear of the Model
OPR300-24SN
0V =Indicates Ground Line
–V = Indicates Negative 24VDC