Technical Manual MPS48-12M Effective: October 2007 Alpha Technologies
Alpha Technologies Power ®
MPS48-12M Technical Manual 021-514-B2-001, Rev. A Effective Date: October 2007 Copyright© 2007 Alpha Technologies, Inc. member of The GroupTM NOTE: Photographs contained in this manual are for illustrative purposes only. These photographs may not match your installation. NOTE: Operator is cautioned to review the drawings and illustrations contained in this manual before proceeding.
Table of Contents Safety Notes .......................................................................................................................... 6 1.0 Introduction ................................................................................................................11 2.0 Theory of Operation .................................................................................................. 12 3.0 Specifications...........................................................................
List of Figures and Tables Fig. 1-1, MPS48-12M Overview ...........................................................................................11 Fig. 3-1, MPS48-12M Enclosure Dimensions...................................................................... 14 Fig. 4-1, AC Connections..................................................................................................... 19 Fig. 4-2, Input Voltage Select Switch .................................................................................
Safety Notes Review the drawings and illustrations contained in this manual before proceeding. If there are any questions regarding the safe installation or operation of this product, contact Alpha Technologies or the nearest Alpha representative. Save this document for future reference. To reduce the risk of injury or death, and to ensure the continued safe operation of this product, the following symbols have been placed throughout this manual. Where these symbols appear, use extra care and attention.
General Safety Precautions To avoid injury: • This enclosure and its associated hardware must be serviced only by authorized personnel. • Enclosure must remain locked at all times, except when authorized service personnel are present. • Remove all conductive jewelry or personal equipment prior to servicing equipment, parts, connectors, wiring, or batteries. • Read and follow all installation, equipment grounding, usage, and service instructions included in this manual.
Battery Safety Notes WARNING! Lead-acid batteries contain dangerous voltages, currents, and corrosive material. Battery installation, maintenance, service, and replacement must be performed only by authorized personnel. Chemical Hazards Any gelled or liquid emissions from a valve-regulated lead-acid (VRLA) battery contain dilute sulfuric acid, which is harmful to the skin and eyes. Emissions are electrolytic, and are electrically conductive and corrosive.
Battery Maintenance Guidelines The battery maintenance instructions listed below are for reference only. Battery manufacturer’s instructions for transportation, installation, storage or maintenance take precedence over these instructions. • • • • • • • To prevent damage, inspect batteries every 6 months for: Signs of battery cracking, leaking or swelling. The battery should be replaced immediately by authorized personnel using a battery of the identical type and rating.
Grounding Connection Notes In order to provide a ready, reliable source of backup power, it is necessary to establish a grounding system that provides for the safety of service personnel responsible for operation and maintenance, and facilitates the proper operation and protection of the equipment within the network. The grounding system must provide protection with respect to operator safety, system communication, and equipment protection. Safety Ground The safety ground is a two-part system.
1.0 Introduction Alpha’s FlexNet MPS48-12M multipurpose power supply provides primary and standby power to outdoor mesh access points in switched-streetlight applications. The MPS48-12M interface module includes connections for the radio, Ethernet backhaul, and Local Craft Port. The MPS48-12M is supported by a full complement of options including batteries, 120Vac or 230Vac battery heater board, and preconnectorized communications cables.
2.0 Theory of Operation The FlexNet MPS48-12M multipurpose power supply provides filtered output power for a typical 48Vdc telecom bus in switched streetlight applications. During nighttime hours, the power supply powers the load and charges the batteries. During daytime hours, the MPS48-12C powers the load from a string of four 12Ah deep cycle batteries. Metal oxide varistor (MOV) technology provides line voltage surge suppression in the event of line cross or power spikes.
3.0 Specifications Input Voltage Range (switch selectable) Input Current Frequency Surge Protection Output Operating Output Power Output Voltage Ripple Noise Transfer Characteristics Battery Type Temperature Capacity Weight (lb/kg) Dimensions (in/mm) LED Indicators Output Okay Standby Operation Low/Missing Battery Replace Battery Overload 90-132Vac (low range) or 180-264Vac (high range), 250 to 347Vac with optional step-down transformers <2A 47Hz or 63Hz ANSI/IEEE Std. C62.
12.42" (315mm) 3.5" (89mm) 7.22" (183mm) 5.72" (145mm) 17.00" (432mm) 21.00" (533mm) 24.83" (631mm) 2.00" (51mm) 12.78" (325mm) Fig. 3-1, MPS48-12M.
4.0 Installation 4.1 Unpacking the MPS48-12M Locate the top-side of the product carton and open. Remove the mounting bracket and enclosure. Inspect the MPS48-12M for shipping damage. Verify each carton contains: 4.
4.0 Installation, continued 4.2 Enclosure Installation, Wall-mount or Wooden Pole Mount 4. Affix the four screw gaskets to the back of the enclosure, over the bracket mounting holes. (back view) 5. Hang the enclosure on the bracket. 6. Secure the enclosure to the bracket using the four self-tapping screws with washers (supplied). Proceed to Section 4.4. 16 021-514-B2-001, Rev.
4.0 Installation, continued 4.3 Enclosure Installation, Steel or Concrete Pole To mount the MPS48-12M on concrete or steel poles, two user-supplied mounting straps are required (straps must be stainless, galvanized or equivalent). Most codes require the base of the enclosure to be located a minimum height from the ground. Always verify height restrictions before proceeding. ATTENTION: The majority of poles are the property of the local utility.
4.0 Installation, continued 4.3 Enclosure Installation, Steel or Concrete Pole, continued 3. Hang the enclosure on the bracket. 4. Secure the enclosure to the bracket using the four self-tapping screws with washers (supplied). 18 021-514-B2-001, Rev.
4.0 Installation, continued 4.
4.0 Installation, continued 4.5 AC Connection with High Voltage Transformer The transformer converts high voltage to 230Vac. The transformer is required for powering from high voltage streetlight applications. Use the following connection procedures for installing the transformer kit. Recommended Tools and Materials: • • • #2 Phillips screwdriver #1 flathead screwdriver Diagonal cutters CAUTION! Never apply high voltage to a unit without using a step-down transformer.
4.0 Installation, continued 4.5.1 AC Connection with High Voltage Transformer, continued 4. Connect the red wire from the transformer to the L1 terminal on the AC input block. Torque to 4.5 in-lbs (.5 N m). 5. Connect the white wire from the transformer to the L2 terminal on the AC input block. Torque to 4.5 in-lbs (.5 N m). 6. Connect the green 3-pin connector from the transformer to the AC input connector on the power module. 7. Secure the new wiring with cable ties. 4.5.
4.0 Installation, continued 4.6 Enclosure Grounding The diagram below describes recommended grounding for MPS series enclosures. In areas of significant lightening activity, it is highly reommended the following recommendations are followed. ATTENTION: • Alpha Technologies recommends using the grounding method illustrated below.
4.0 Installation, continued 4.7 Radio Cable Connection Procedure Recommended Tools and Materials: Channellock® pliers 1. Remove the white seal from the 3-hole strain relief fitting and install the base of the fitting into the 3/4" knockout, securing the top inside nut. Radio Cable 2. Route the radio cable into the enclosure through the outer nut and base. 3. Route the Ethernet cable from inside the enclosure, down through the strain relief fitting. 4.
4.0 Installation, continued 4.8 Battery Connection Procedure Recommended Tools and Materials: • #2 flathead screwdriver • Electrical tape 1. Loosen the retaining screw on the battery retaining bracket and move the bracket clear of the battery shelf. If installing a cold weather kit (Alpha P/N 745-932-20), complete the procedure in Section 6.1 before proceeding. 2. Place one 12Ah batteries on the top battery shelf and tape the battery temperature probe to the side of the battery.
5.0 Operation 5.1 Start-up 1. Verify the input voltage select switch on the power module is set for the correct input voltage. The factory default setting is 230Vac. WARNING! Incorrect voltage selection can damage the unit and void the warranty. Verify the input voltage select switch matches applied AC input power. Never apply 230Vac to a unit with the input voltage select switch in the 115Vac position. 2. Verify customer-end connections and apply AC power to the unit. 3.
5.0 Operation 5.3 Battery Backup Mode In the event of an AC power outage, the MPS48-12M switches to battery backup mode and the green status LED begins to blink. The MPS48-12M runs in battery backup mode until AC power is restored, or until the battery string reaches a low-voltage shutdown level of 42V. On resumption of AC power, the MPS48-12M recharges the batteries at a maximum current of 1.8A. 5.4 Charging Mode Under normal conditions, a float charge maintains the batteries at 100% capacity.
6.0 Installing the Cold Weather Kit The MPS48-12 Cold Weather Kit for streetlight applications (Alpha P/N 745-932-20) provides extended battery backup runtimes in cold weather environments. The kit contains an insulated battery box, two battery heater mats, wire kit, and mounting hardware. 6.1 Installing the Battery Heater Mats 1. Loosen and move the battery retaining brackets to the side of the battery trays. 2. Place a battery heater mat on the upper and lower shelves. 3.
6.0 Installing the Cold Weather Kit, continued 6.2 Installing the Insulated Battery Box 1. Route the battery wiring and temperature probe through the center cutout in the top of the battery box. Route the AC input wiring through the notches on the left side of the battery box. 2. Position the battery box over the batteries and hang the box on the mounting stud. The keyhole tab is on the top of the box (A). 3. Secure the bottom of the box with the provided Phillips screw (B). A B Fig.
7.0 Troubleshooting 7.1 Troubleshooting Table Troubleshooting Table Fault Corrective Action Green LED is blinking after initial startup: Verify AC power is ON. Check voltage at AC input block. Check AC input connector on power module. Red LED is ON solid: Replace batteries. Red LED is blinking. If no batteries are missing, check battery connections. Check battery string connector on power module. Both red and green LEDs are blinking: Possible overload condition.
8.0 Maintenance 8.1 Battery Replacement The MPS48-12M batteries are hot-swappable. There is no need to power down the unit when replacing the batteries. Recommended Tools and Materials: #2 flathead screwdriver 1. Unplug the battery connections. 2. Loosen the retaining screw on the battery retaining bracket and move the bracket clear of the battery shelf. 3. Remove the batteries in need of replacement. 4. Replace the batteries.
8.0 Maintenance, continued 8.3 Battery Management Batteries have limited shelf life and must be put into service in a timely manner. The chart below provides general storage guidelines and illustrates the relationship between capacity retention and storage temperature over time. Consult battery documentation for product specific information. Capacity Retention Ratio % 100% No supplementary charge required. (Carry out supplementary battery charge before use if 100% capacity is required).
Alpha Technologies Power ® Alpha Technologies 3767 Alpha Way Bellingham, WA 98226 USA Tel: +1 360 647 2360 Fax: +1 360 671 4936 Web: www.alpha.com Alpha Technologies Ltd. 4084 McConnell Court Burnaby, BC, V5A 3N7 CANADA Tel: +1 604 430 1476 Fax: +1 604 430 8908 Alpha Technologies Europe Ltd.
