Technical Manual MPS48-7M Effective: August 2007 Alpha Technologies
Alpha Technologies Power ®
MPS48-7M Technical Manual 021-511-B4-002, Rev. B Effective Date: August 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.
Contents Safety Notes .......................................................................................................................... 6 1.0 Introduction ............................................................................................................... 10 2.0 Theory of Operation ...................................................................................................11 3.0 Specifications....................................................................................
List of Figures and Tables Fig. 1-1, MPS48-7M Overview ............................................................................................ 10 Fig. 3-1, MPS48-7M Enclosure Dimensions........................................................................ 13 Fig. 4-1, AC Connections..................................................................................................... 17 Fig. 4-2, Input Voltage Select Switch ...............................................................................
Safety Notes Review the drawings and illustrations 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 hardware must only be serviced by authorized personnel. • The 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. • • • • • 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.
1.0 Introduction Alpha’s FlexNet MPS48-7M multipurpose power supply provides primary and standby power to Wi-Fi radios in wall-mount and pole-mount applications. The MPS48-7M interface module includes connections for radio, Ethernet backhaul, local Craft port, and 48Vdc auxiliary connection. The MPS48-7M is supported by a full complement of options including batteries, 120Vac or 240Vac battery heater mat, 120Vac line cord, and a step-down transformer for high voltage streetlight applications.
2.0 Theory of Operation The FlexNet MPS48-7M multipurpose power supply provides filtered 50W output power for a typical 48V telecom bus during normal line operation. During line disruptions, the MPS48-7M supplies uninterrupted output power of 50W directly from a string of four 12V 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) Frequency Surge Protection Output Operating Output Power Output Voltage Ripple Noise Transfer Characteristics Battery Type Temperature Capacity Weight (lb/kg) Dimensions (in/mm) Runtime: 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 transformer 47Hz or 63Hz ANSI/IEEE Std. C62.
3.0 Specifications, continued 12.4" (315mm) 3.5" (89mm) 0.380" (10mm) dia. 0.395" (10mm) dia. 6.7" (170mm) 5.2" (132mm) 10.0" (254mm) 14.0" (356mm) 17.0" (432mm) 17.4" (442mm) 2.0" (51mm) 12.8" (325mm) Fig. 3-1, MPS48-7M Enclosure Dimensions Spare Parts and Options Part Number 189-078-20 189-078-21 745-866-20 745-863-20 745-850-22 243-119-19 875-580-10 650-264-10 650-225-10 181-036-10 181-063-10 021-511-B4-002, Rev.
4.0 Installation 4.1 Unpacking the MPS48-7M Remove the mounting bracket and enclosure from the shipping carton. Inspect the MPS48-7M for shipping damage. Verify each carton contains: 4.2 • MPS48-7M enclosure • Mounting bracket and hardware • 3/4" 3-hole strain relief fitting • 1/2" strain relief fitting • Cable ties • Quick Start Guide Enclosure Installation, Wall-mount or Wooden Pole-mount Most codes require the base of the enclosure to be located a minimum height from the ground.
4.0 Installation, continued 4.2 Enclosure Installation, Wall-mount or Wooden Pole Mount, continued 4. Hang the enclosure on the bracket. 5. Secure the enclosure to the bracket using the four self-tapping screws with washers (supplied). Proceed to Section 4.4. 021-511-B4-002, Rev.
4.0 Installation, continued 4.3 Enclosure Installation, Steel or Concrete Pole To mount the MPS48-7M 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 installation. ATTENTION: Before installing an enclosure, the location and method of mounting must be approved by the property owner.
4.0 Installation, continued 4.
4.0 Installation, continued 4.5 AC Connection with High Voltage Transformer The transformer converts high voltage to 240Vac. The transformer is required for powering the MPS48-7M from high voltage light pole applications. Use the following connection procedures for installing the transformer kit. Required Tools and Materials: • • • #2 Phillips screwdriver #1 flathead screwdriver (torque drive) Diagonal cutters CAUTION! Never apply high voltage to a unit without using a step-down transformer.
4.0 Installation, continued 4.5 AC Connection with High Voltage Transformer, continued 4.5.2 Installing the Streetlight AC Power Tap Cable 1. Remove the 1/2" EMT knockout (7/8" dia.) and the 3/4" EMT knockout (1 1/8" dia.), located in the center bottom of the enclosure. For alternate installation, remove knockouts from the right side, left side or back left of the enclosure as needed. 2. Install the provided 1/2" strain relief fitting in the 1/2" knockout.
4.0 Installation, continued 4.6 Network Cable Connection Procedure Required 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. Secure the top inside nut. Network Cable (optional) 2. Route the customer-supplied connection cables into the enclosure through the outer nut and base. 3.
4.0 Installation, continued 4.7 Battery Connection Procedure Required 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. 2. If using the battery heater mat option, verify the input voltage printed on the battery heater mat label corresponds to the selected input voltage (default 240V). Place the battery heater mat on the shelf.
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 240Vac. CAUTION! Incorrect voltage selection can damage the unit and void the warranty. Verify the input voltage select switch matches applied AC input power. Never apply 240Vac to a unit with the input voltage select switch in the 120Vac 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 MPS48-7M switches to battery backup mode to power the load. The green status LED begins to blink, indicating the load is being powered from the battery string. The MPS48-7M runs in battery backup mode until AC power is restored, or until the battery string reach a low-voltage shutdown level of 42V. On resumption of AC power, the MPS48-7M recharges the batteries at a maximum current of 1.8A. 5.
6.0 Troubleshooting 6.1 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.
7.0 Maintenance 7.1 Battery Replacement The MPS48-7M batteries are hot-swappable. There is no need to power down the unit when replacing the batteries. Required 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 with 7.2Ah batteries.
7.0 Maintenance, continued 7.3 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.
