ADTRAN Total Access 750 User's Manual
Contents
1. When a failed battery is detected it is indicated by the Alarm Relay cycling open for 450 ms then closed for 450 ms Battery failure is also indicated by the output alarm signal cycling open to ground at the same rate BATTERY DISCONNECT RELAY The battery disconnect relay disconnects the battery pack from the system 1f the battery voltage falls below 40 VDC This feature prevents damage to the batteries The batteries will be recharged when normal AC voltage is restored and the relay will close when the battery voltage exceeds 40V Certain alarm features on the power supply are still powered by the battery after the disconnect relay is opened These features slowly drain the battery If it is known that AC power will be unavailable for an extended period greater than a week ADTRAN recommends that the battery be disconnected from the power supply to prevent over discharge The batteries used in ADTRAN s battery backup system are designed to withstand occasional over discharge While it is not recommended the batteries can recover their full capacity under normal charging conditions even when they have been subjected to extreme over discharge Fuse A 3 amp fuse on the back panel protects the unit from over current The fuse isolates the AC input from the power supply in the event of a fault The fuse is replaced by twisting the black cap to the left and pulling the fuse out After the new fuse is inserted the cap is p2. e Battery disconnect relay ALARM RELAY AND ALARM SIGNAL The Alarm relay is provided for customer use In normal operation the contact alarm relay is open If an AC power failure occurs and the unit defaults to the battery backup the relay will cycle open closed once per second that is one second open then one second closed The tolerance on this cycle time is 25 percent This indicates the battery is discharging in support of the load If battery voltage decreases to 45V the relay stays closed to indicate the battery is becoming depleted The relay will open automatically when normal AC voltage is restored Table 1 summarizes alarm relay operation Table 1 Alarm Relay Operation Alarm Relay Cycles open closed once per second Condition Normal AC Power Failure Battery Backup engaged Battery voltage is less than 40V Stays closed An alarm signal that cycles synchronously with the alarm relay is provided on the output cable This signal which is open during normal operation cycles between open and ground during battery backup as described for the alarm relay and is ground when the battery voltage falls below 45V BATTERY FAIL ALARM For battery backup systems that employ the optional Battery Test Assembly P N 1175044L3 an alarm signal is provided to the TA 750 850 L2 Power Supply that indicates a failed battery in need of immediate replacement This signal is passed to the Alarm Relay and Output Alarm Signal
3. ADRAN Section 61175043L2 5A Issue 1 June 2000 CLEI Code SIMPAADA _ Total Access 750 850 AC DC Power Supply and Battery Charger Installation and Maintenance Contents WB WN Z 4 gt gt Q Z 6 WARRANTY AND CUSTOMER SERVICE Figures Figure 1 TA 750 850 PS BC Front and Back Figure 2 AC DC Power Supply Battery Charger Layout Figure 3 Alternate Mounting Arrangements 0 Tables Table 1 Alarm Relay Operation cccceccccceeceeeeeeeeeees Table 2 LED Indication 00 cccecceceeeeeeeeeeeeeeeneenes Table 3 Specifications senccussccervadeesssesancenns eremstvnddediaresecianee 1 GENERAL This practice provides installation and maintenance procedures for the ADTRAN Total Access 750 850 Power Supply Battery Charger Figure 1 is a front and back illustration of the PS BC Revision History This is the initial release of this document Future revisions will be made in this subsection Features The Total Access 750 850 PS BC P N 1175043L2 features include the following e Compact design e Versatile mounting arrangements e All mounting hardware included e Built in Fuse e Miulti feature status LED e Modular connections e Positive ground e Uninterrupted power output if battery backup connected e FCC and UL 1950 compliant GRN OK YEL DISCHARGING 417504312 RED LOW OFF FAIL OFF NOT CONNE
4. CTED 120 VAC 2A 60HZ INPUT THIS UNIT MAY BE pe POWERED BY 2 SN SOURCES BOTHA 1175043L2 E y AC ALARM DP 2A INPUT OUTPUT Figure 1 TA 750 850 PS BC Front and Back 2 DESCRIPTION The AC DC Power Supply Battery Charger provides 54 VDC to the Power Supply Unit in the TA 750 850 Chassis The PS BC receives 115 VAC through a standard plug and wall socket The unit works in conjunction with an optional ADTRAN backup battery pack P N 1175044L1 L2 L3 In this arrangement the PS BC maintains the battery at peak charge of 54V If AC power is lost the unit automatically transfers power from the battery pack without interrupting service When AC power returns the unit switches back to AC power and recharges the battery to peak charge This device complies with Part 15 of the FCC rules Operation is subject to the following two conditions 1 This device may not cause harmful interference and 2 this device must accept any interference that may cause undesired operation Changes or modifications not expressly approved by ADTRAN could void the user s authority to operate this equipment 61175043L2 5A Trademarks Any brand names and product names included in this document are trademarks registered trademarks or trade names of their respective holders Alarm and Battery Disconnect Relays Two relays support Power Supply operation e Alarm relay
5. for repair upgrade 256 963 8722 Repair and Return Address ADTRAN Inc Customer and Product Support CAPS 901 Explorer Boulevard Huntsville Alabama 35806 2807 4 Section 61175043L2 5 Issue 1 61175043L2 5A
6. rce CAUTION During TA 750 wall installation position the chassis so front panels face up 54 VDC Output to TA 750 Bw AC Power Input Optional Mounting Locations As an optional installation arrangement the PS BC unit can mount on either side of the TA 750 850 chassis or the top of the battery pack wall or rack orientation which has space for two PS BCs These locations all have pre threaded inserts designed for the PS BC For installation four 6 32 by 3 8 inch machine screws are provided CAUTION When mounting to the battery pack using screws longer than 3 8 inch could damage batteries 48 VDC Backup Battery Pack ADRAN 1175044L1 BATTERY BACKUP WARNING To Alarms AC DC Power Supply Battery Charging Unit P N 1175043L2 54 VDC Battery Charging Discharging Line Figure 2 AC DC Power Supply Battery Charger Layout 61175043L2 5A Section 61175043L2 5 Issue 1 Refer to Figure 3 for optional mounting arragements Figure 3 Alternate Mounting Arrangements Grounding The ground connector on the PS BC provides an additional ground reference the third prong of the AC plug is also grounded and may be connected to ground bus or ground wire in a customer equipment room 18 AWG or larger ground wire is recommended 4 SPECIFICATIONS Refer to Table 3 for specifications 5 MAINTENANCE The AC DC Power Supply Battery Charger does not require rou
7. tine maintenance for design operation ADTRAN does not recommend that repairs be attempted in the field Repair services are obtained by returning the defective unit to ADTRAN Customer Service 6 WARRANTY AND CUSTOMER SERVICE ADTRAN will replace or repair this product within 10 Table 3 Specifications 115 Volts nominal 88 to 132 VAC 54 Volts 60 Watts average 100 Watts peak 16 hr nominal 24 hr maximum Up to 8 hours AC Input Range DC Output Battery charging Battery discharge Physical Dimensions 3 1 2 W x 1 3 44 Hx 7 L including mounting tabs Weight 1 Ib 8 Oz Environmental Operating temperature 0 to 50 C 32 to 122 F Storage temperature 40 to 85 C 40 to 185 F Relative humidity 95 non condensing years from the date of shipment if it does not meet its published specifications or fails while in service see ADTRAN Equipment Warranty Repair and Return Policy and Procedure document 60000087 10A Contact Customer And Product Service CAPS prior to returning equipment to ADTRAN For service CAPS requests or further information contact one of the following numbers ADTRAN Sales Pricing and availability 888 4 ADTRAN ADTRAN Technical Support Presales Applications Post sale Technical Assistance 800 726 8663 Standard support hours Monday Friday 7 a m 7 p m CST Emergency support 7 days week 24 hours day ADTRAN Repair CAPS Return
8. ushed back in and turned to the right Status LED A single multi feature LED on the front panel provides AC operation or battery operation power status Refer to Table 2 for indication descriptions Table 2 LED Indication Operation Operation 3 INSTALLATION s CAUTION SUBJECT TO ELECTROSTATIC DAMAGE OR DECREASE IN RELIABILITY HANDLING PRECAUTIONS REQUIRED After unpacking the unit inspect it for damage If damage is noted file a claim with the carrier then notify ADTRAN Customer Service Section 61175043L2 5 Issue 1 61175043L2 5A There are three installation arrangements e Wallmount e Mounted to TA 750 850 chassis e Mounted to backup Battery Pack L1 only Wallmounting For the wallmount arrangement the PS BC is normally installed on the designated 3 4 inch or thicker plywood with four 6 by 3 4 inch flat head wood screws Refer to Figure 2 Installation is as follows 1 Determine the preferred layout and ensure the socket outlet is located near the equipment and easily accessible 2 Ensure the unit is plumb then mark through the four screw holes to identify where the pilot holes will be drilled 3 Using a 1 16 inch bit drill pilot holes at the marked locations 4 Mount the unit using the pan head screws 5 Route and connect all cabling to the appropriate device Use cable tie downs as needed 6 Connect the ground stud using the most direct route to a known equipment ground sou
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