Installation and Operations Manual SEI DC-UPS SERIES SEI Incorporated 5115 Pegasus Court, Suite Q Frederick, Md 21704 Phone 301-694-9601 Fax 301-694-9608 Email Info@seipower.com Web http://www.seipower.
TABLE OF CONTENTS Table of Contents............................................................................................... 1 Description......................................................................................................... 2 Technical Specifications.................................................................................... 3 Environmental Specifications............................................................................ 4 Safety Information .......................
DESCRIPTION The SEI DC-UPS series is a compact unit designed to service a wide range of customer equipment requiring battery-backed 48 VDC power. The DC-UPS series comes equipped with up to 750 Watts of rectifier power using parallel 250Watt rectifiers for reliability. The distribution is provided on the right side of the unit. Commercial power is applied to the left side of the unit. The SEI DC-UPS can be mounted on a wall, a 19-inch rack or an optional DIN Rail mount.
TECHNICAL SPECIFICATIONS SEI-250 Electrical Specifications Input Voltage Frequency Current Output Voltage Current Mechanical Dimensions Width Depth Height Weight 120 +10/-15% VAC 50-60 Hz 3 amps Max 42-56VDC 4.5 amps 19.00 Inches 5.00 Inches 14.00 Inches 32 lbs SEI-500 Electrical Specifications Input Voltage Frequency Current Output Voltage Current Mechanical Dimensions Width Depth Height Weight 120 +10/-15% VAC 50-60 Hz 6 amps Max 42-56VDC 9 amps 19.00 Inches 5.00 Inches 20.
ENVIRONMENTAL SPECIFICATIONS Temperature Operating Storage 0 °C to +40 °C -20 °C to +50 °C Humidity 0-95% non-condensing Thermal Load SEI-250 SEI-500 SEI-750 190 BTU/hr max 380 BTU/hr max 570 BTU/hr max SAFETY INFORMATION Always insure that the person assigned to the job can perform the job safely. Always lift all equipment properly. Always disconnect commercial power and remove the battery fuse before working on the unit. Always replace the batteries with batteries of the same type and style.
INSTALLATION INSTRUCTIONS GENERAL The installation section of this manual will provide all the necessary information for room requirements, proper inspection, and installation. Inspection The equipment has been fully tested and inspected prior to shipment. Although the unit has been packed in accordance with good commercial practices, it does not preclude damage in transit. The following actions should be taken on receipt of the equipment: Visually inspect the shipping container for damage.
Room Requirements Electrical Requirements • • • All units are shipped from the factory for use with 120 VAC. In the event that operations at 240 VAC is required, please notify the factory. Each unit requires a separate NEMA 5-15R receptacle protected by a 15 Amp circuit breaker. A standard 7 foot 6 inch power cord with a molded NEMA 5-15 plug is supplied with each unit. Mounting Instructions • The SEI DC-UPS weighs between 32 and 36 lbs, depending upon the model.
START UP AND CHECKOUT Power On Checkout. • Once the unit is properly mounted, you may begin the checkout procedure. First, insure that all the equipment to be powered by the unit is installed. • Install the provided battery fuse and fuse holder cap. The fuse holder is on the right side panel of the SEI-250. The fuse holder is on the left side panel of the SEI-500 and SEI-750. • Attach the optional SNMP Network cable, or alarm contacts cable if so optioned.
THEORY OF OPERATION Theory of Operation The following will provide you with an outline of operations and a list of modules found in the DC-UPS. Modules • Rectifiers • System Controller/LVD • Battery Module • Distribution and Connectors RECTIFIER(S) SYSTEM CONTROLLER DISTRIBUTION MODULE(S) BATTERY PACK Functional Block Diagram DC-UPS Figure 1 Rectifier The rectifier converts AC input power to regulated DC output power. Each DC-UPS rectifier provides up to 250 watts of power.
There are two LED indicators on the front of the unit; Battery Charge Status and Battery Test Status.
Remote Alarm Option The DC-UPS Remote Alarm Option provides relay contacts to remotely monitor the status of the unit. These alarms will indicate either an AC Fail or a Battery Test Fail condition. Both normally open and normally closed contacts are provided to suite the user’s external monitoring circuitry. The alarm contacts have a 2 Amp rating. The NO and NC contacts will change state when an alarm condition occurs. The alarm contacts are accessible via an RJ45 connector on the side panel of the DC-UPS.
REPAIR AND MAINTENANCE Repair and Maintenance The SEI DC-UPS is engineered to operate unattended and with low maintenance overhead for extended periods of time. Although the electronics within the DC-UPS require no routine maintenance, the battery charge voltage may drift with time and operating temperature. The DC-UPS continuously monitors the battery charge voltage. If the battery charge voltage is out of adjustment, the Battery Charge Status indicator will flash red.
Note: When setting sense voltages, always adjust the potentiometer until the sense voltage reading changes, and then set it to the desired voltage. Additionally, anytime one power supply is adjusted, all other power supply sense voltages must be re-checked. 4. Once the sense voltages have been balanced, connect the digital voltmeter to the external battery connector. Verify that voltmeter reading is 54.8 Vdc. 5.
Appendix Output Module –A The –A version output module contains two individually fused TYCO/AMP Mat-NLok connectors. Mating Connector: Mating Pin: Wire Gauge: 1-480698-0 350873-3 14-18 AWG Fuse: PORT 1, PORT2 GMT-7.5A, Cooper Bussmann or Equivalent. PORT3, PORT4, PORT 5, PORT6 GMT-15A, Cooper Bussmann or Equivalent Note: The fuse is sized to provide full output power from each connection. If multiple connections are used, the fuse can be re-sized to limit current at a lower value.
Output Module –M The –M version output module contains two eight pint, individually fused MOLEX Minifit connectors. Mating Connector: Mating Pin: Strain relief Wire Gauge: 39-01-2085 39-00-0078 15-04-9343 14-18 AWG Fuse: PORT 1, PORT2 GMT-7.5A, Cooper Bussmann or Equivalent. PORT3, PORT4, PORT 5, PORT6 GMT-15A, Cooper Bussmann or Equivalent Note: The fuse is sized to provide full maximum power from each connection.
Output Module –P Each port contains two ¼ -20 terminal posts suitable for ring lug connection. The 48VRTN connection of each port is fused. Fuses: Ports 1-2 3AG 6A, 0312006 Littlefuse or Equivalent. Ports 3-6 3AG 15A, 326015 Littlefuse or Equivalent. Note: The fuse is sized to provide maximum output power from each connection. If multiple connections are used, the fuse can be re-sized to limit current at a lower value.
