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MODEL ACT PSU ADVANCED COMMUNICATIONS TERMINAL POWER SUPPLY UNIT INSTALLATION/MAINTENANCE CONTENTS 1. GENERAL .....................................................................1 2. INSTALLATION ............................................................1 3. CONNECTIONS ............................................................2 4. FACEPLATE INDICATORS .........................................2 5. MAINTENANCE ............................................................2 6. WARRANTY AND CUSTOMER SERVICE ..................2 FIGURES Figure 1. ADTRAN ACT PSU ...........................................1 Figure 2. Connector Pin Assignments...........................2 TABLES Table A. Basic Features .................................................1 Table B. ACT PSU Specifications..................................2 Table C. Faceplate Indicators ........................................2 1. GENERAL 1.1 This practice provides installation and maintenance information for the ADTRAN Advanced Communications Terminal Power Supply Unit (ACT PSU). Figure 1 is a drawing of the unit. A detailed product description and specifications can be found in the ADTRAN ACT PSU Description Practice, Section 61150052L1-2. The part number and basic features for the unit are provided in Table A. The specifications for the ACT PSU are shown in Table B. 1.2 Revisions to this practice will be summarized in this paragraph. 1.3 The ADTRAN ACT PSU is a common module plug-in used in the ACT 2300, 1900, and 1950 channel banks. The unit converts the -48 VDC input to +5 VDC, +12 VDC, and -12 VDC output voltage levels to be used by other common equipment and channel units. The unit is also designed to operate in a parallel, redundant fashion for increased system reliability. Figure 1. ADTRAN ACT PSU 2. INSTALLATION 2.1 Inspect the unit for shipping damage immediately after unpacking it. If damage is discovered, file a claim immediately with the carrier; then contact ADTRAN Customer Service (see subsection 6.2). 2.2 The ACT PSU plugs directly into the common card area in the positions marked POWER SUPPLY A or POWER SUPPLY B. To install the ACT PSU, grasp the unit by the faceplate and push it firmly into the backplane connector until the unit is seated. Lock the unit in position using the two faceplate screws. 2.3 There are no adjustments or options for the ACT PSU. Table A. Basic Features Unit Part No. Features ACT PSU 1150052L1 Fuses incoming -48 V and 20 Hz ringing voltage. Converts -48 VDC to regulated +5 VDC, +12 VDC, and -12 VDC. Outputs individually diode isolated to allow redundant operation. Front panel test points for all voltages. Front panel indicators showing the status of the unit. Filters -48 V to provide -48 F for the rest of the system. 61150.052L1-5A Page 1 Section 61150.052L1-5, Issue 1 Table B. ACT PSU Specifications Input DC Voltage Current -42.25 VDC to -56.00 VDC, -48 VDC, nominal 3.0 A Ringing Voltage Current 0 Vrms to 120 Vrms 105 Vrms, nominal 0.25 A +5 V +12 V -12 V -48 V filtered 20 Hz Output 3. CONNECTIONS 3.1 Figure 2 shows the ACT PSU connector pin assignments. All inputs and outputs to the ACT PSU are made through the backplane. No additional backplane wiring is necessary for normal operation. MAD0 MAD1 MAD2 20 Hz FUSED RET 20 Hz IN RET GND GND -12 V + 12 V GND GND + 5 V + 5 V -48 FRT -48 FRT -48 VRT -48 VRT -48 IN RT -48 IN RT FRM GND +5 VDC ± 5% 4 A, maximum +12 VDC ± 10% 1 A, maximum -12 VDC ± 10% 1 A, maximum -42.25 V to -56.00 V 2 A, maximum 0 to 120 Vrms 105 V, nominal 0.25 A, maximum 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 TPSS TSPV RSPV PFAIL 20 Hz FUSED 20 Hz IN GND GND -12 V + 12 V GND GND + 5 V + 5 V -48 F -48 F -48 V -48 V -48 V IN -48 V IN FRM GND 4. FACEPLATE INDICATORS Table C shows the status indicators for incoming power, ringing voltage, and outgoing voltages. Table C. Faceplate Indicators Indicator Description PWR ON, 20 HZ ON PWR FAIL Indicator turns Onwhenever incoming power or ringing voltage is present. Indicator turns Onwhenever one of the outgoing voltages of the individual PSU has failed. 5. MAINTENANCE 5.1 The ACT PSU requires no routine maintenance to operate properly. The faceplate has two faceplate fuses. If a fuse blows, a colored pin becomes visible from the front of the channel bank. To remove a fuse, grasp it and firmly pull it from the holder. To insert a fuse, push it into the holder until it firmly seats. 5.2 ADTRAN does not recommend that repairs be performed in the field. Repair services may be obtained by returning the defective unit to the ADTRAN Repair Department (see subsection 6.2). 6. WARRANTY AND CUSTOMER SERVICE ADTRAN will replace or repair this product within five years from the date of shipment, if the product does not meet its published specifications or if it fails while in service. For detailed warranty, repair, and return information, refer to the ADTR...