61175006L2-5A Issue 1, June 2001 CLEI Code: SIPUBBBBAA Total Access 750/850 Power Supply Unit /Ring Generator Unit Total Access 750/850 PSU/RGU Installation and Maintenance Practice Contents General ............................................................................1 Installing the Module ....................................................2 PSU Specifications ..................................................................3 1175006L2 Maintenance ...................................................................4 Warranty and Customer Service .................................4 RING POWER ENABLE Figures RING Total Access 750/850 PSU/RGU .................................1 BANK ALM ACO Tables Telecommunications Codes .........................................3 1. GENERAL This document provides installation and maintenance procedures for the ADTRAN TA 750/850 Power Sup- ply Unit/Ring Generator Unit (P/N 1175006L2). See Figure 1 for an illustration of the Total Access 750/850 PSU/RGU. Figure 1. Total Access 750/850 PSU/RGU Revision History This is the initial release of this document. Future General Description revisions to this document will be explained in this The TA 750/850 PSU is a common module plug-in unit subsection. designed for use in the ADTRAN TA 750 and TA 850 channel banks. The faceplate contains a momentary Features ACO pushbutton, a ring voltage Enable/Disable push- The TA 750/850 PSU Module includes the following button, a Bank Alarm LED, Ring LED, and a power features: LED. All power, ground, and timing signals, are  Receives unregulated power input. prewired, thus eliminating additional wiring require-  Distributes regulated power for all requirements. ments.  Generates ring voltage. The PSU does not require provisioning prior to inser-  Faceplate mounted input power fuse. tion into the channel bank.  Faceplate mounted ring voltage disconnect.  Loss of power alarm notification. This device complies with Part 15 of the FCC rules. Op- eration is subject to the following two conditions:  Loss of ring voltage alarm notification.  Ring generator failure detection. 1. This device may not cause harmful interference,  Channel bank alarm notification. and,  Alarm Cut Off pushbutton to silence audible chan- 2. This device must accept any interference received, nel bank alarms. including interference that may cause undesired  Provision free plug-and play. operation.  FCC and UL 1950 compliant.  Meets NEBS Level 3 requirements. Changes or modifications not expressly approved by ADTRAN could void the user’s authority to operate this equipment. Trademarks: Any brand names and product names included in this document are 61175006L2-5A 1 trademarks, registered trademarks, or trade names of their respective holders. Functional Description Table 1. Alarm Notification The TA 750/850 PSU receives externally supplied -48 VDC from connectors P4 (normal) and P5 (alternate) on Relays Activated Alarm Condition the rear of the unit. Connector P4 connects from the Power Supply/Battery Charger module. P5 is a 3-lug MJR MJVR -48ALM terminal strip that receives -48 VDC from customer Local Alarm X X supplied office power. Remote Alarm X X Through switchmode operation the PSU converts the incoming -48 VDC to regulated +5 VDC, +3.3 VDC, -7.5 AIS Alarm X X VDC, -26 VDC, and -48 VDC for distribution to other PSU Power Fuse Fails X X X modules. Alarms ACO Deactivates X X Ring voltage circuitry within the PSU generates 105 ACO will not deactivate MJR after a power fuse Vrms, 20 Hz ring voltage for distribution to the channel failure. bank’s FXS cards. Ring voltage is disabled by pushing the Ring Enable button. 2. INSTALLING THE MODULE Carefully unpack and inspect the TA 750/850 PSU for Faults and Alarms shipping damages. If you suspect damage has occurred Bank Alarm during shipping, immediately file a claim with the car- If a Red, Yellow, or Blue Bank Alarm condition occurs, rier, then contact ADTRAN Technical Support (see the Bank Alarm LED turns On and the MJ and MJV re- Warranty and Customer Service on page 4). If possible, lays Close. Pin MJ shorts to MJR and pin MJV shorts to keep the original shipping container for returning the MJVR. Through the MJ and MJV closed relays, and as- TA 750/850 PSU for repair or for verification of ship- sociated backplane pins, a customer installed remote ping damage. audio and/or visual alarm notification is activated. In Shipping Contents this alarm state, if the ACO pushbutton is depressed the The contents include the following items: MJV relay resets to the Open position. This turns Off the remote alarms and causes the Bank Alarm LED to Flash,  TA 750/850 Power Supply Unit /Ring Generator indicating that an alarm condition still exists. When the Unit alarm condition terminates, the Bank alarm LED will  TA 750/850 PSU/RGU User Manual turn off and all relays reset Open. Instructions for Installing the Module During normal (no alarm) operation the Bank alarm Follow the steps below to install the module. LED is Off and the ACO pushbutton is inactive. 1. The TA 750/850 PSU inserts directly into the com- Power Failure Alarm moncard area inthe positionlabeledPSU. The The following alarm sequence provides notification of unit is mechanically keyed to prevent insertion in both loss of regulated DC power and loss of ring gener- any other slot. ator voltage. Prior to circuit card installation, remove the If input power is lost, the -48 ALM pin will not see volt- chassis card-lock safety bar by disengaging the age so any attached device will not activate. However, captured screw and lifting the safety bar away the MJ/MJR and the MJVR alarm contacts will still from the chassis. short out, activating the customer installed remote alarms. See Table 1 for a summary of alarm notification. 2. To install the PSU, grasp the unit by the faceplate while supporting the bottom side. 3. Align the card edges to the guide grooves and insert the unit until the edge connector seats firmly into the backplane. 4. Lock the card in place by pushing in on the lock lever. 5. Reinstall the card-lock safety bar. 2 Issue 1, June 2001 61175006L2-5A Telecommunications Codes 3. SPECIFICATIONS This product is intended to be installed in products pro- The following table provides specifications for the TA viding Type “B” or “E” enclosure, and in a Restricted 750/850: Access Location. Refer to Table . Electrical Telecommunications Codes Input DC Voltage -40 VDC to -56 VDC Code Input Output -48 VDC nominal Power Code (PC) F C Maximum Current 1.0 Amp (3 Amp fused) @ -48 V Telecommunications Code (TC) - - Commons Only 300 milliamp Installation Code (IC) A - Maximum Power 48 Watts Face Plate Optioning The TA 750/850 PSU has no options or adjustments. Switch  Momentary Action ACO pushbutton Connections  Ring Voltage Enable push- All input and output signals to the TA 750/850 PSU are button made through the backplane. No additional backplane wiring is necessary for normal operation. LEDs Red Bank Alarm indication Power Ring Ring Voltage is hazardous. Depress the Environmental Ring Enable pushbutton to isolate ring voltage from the TA 750/850 prior to per- o o o o Operating -40 Cto65 C (-40 F to 149 F) forming any open chassis or wiring oper- Temperature ations. o o o o Storage -40 Cto85 C (-40 F to 185 F) Temperature Relative Humidity 95% maximum, non-condensing Physical Dimensions 9 3/8” L x 2 1/2” H x 7/8 W Weight 3.2 ounces Ring Generator Output Voltage 105 Vrms nominal; Range: 97 to 115 Vrms AC Voltage (at >45 Vrms AC @ maximum line handset) length DC Offset -70 VDC to -40 VDC Frequency 20.5 Hz + .05 Hz Crest Factor 1.4 nominal, sinusiod Output Load 20 REN continuous, 25 REN up to 30 minutes 30 REN up to 10 minutes, 35 REN up to 5 minutes 61175006L2-5A Issue 1, June 2001 3 4. MAINTENANCE The TA 750/850 PSU requires no routine maintenance to operate properly. ADTRAN cautions against performing repairs in the field. Repair services are available if you return damaged units to ADTRAN. Refer to the following section, “Warranty and Customer Service,” for further information. 5. WARRANTY AND CUSTOMER SERVICE ADTRAN will replace or repair this product within ten years of the date of shipment if it does not meet its pub- lished specifications or fails while in service. Return Material Authorization (RMA) is required prior to returning equipment to ADTRAN. For service,RMArequests,or further information con- tact one of the following numbers: ADTRAN Sales (800) 827-0807 ADTRAN Technical Support (888) 4ADTRAN CAPS Department (256) 963-8722 Repair and Return Address Clearly identify the RMA number on the package and return to the following address: ADTRAN Customer and Products Service 901 Explorer Blvd. Huntsville, AL 35806 RMA # _______________ 4 Issue 1, June 2001 61175006L2-5A