Inter-Tel 824 Installation And Field Maintenance Manual
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INTER-TEL PRACTICES INSTALLATION 824 INSTALLATION & MAINTENANCE Issue 1, June 1984 FIGURE 3-5. STATION CABLE TERMINATIONS ON THE KTI BLOCK Terminal Number 26 WH - BL Tl TIP CKT 1 1.1 2.5 1 BL - WH Rl RING CKT 1 27 WH - OR +1 +3aV CKT 1 2 OR - WH Gl GROUND CKT 1 28 3 29 4 30 WH - GN T2 GN - WH R2 WH - BR +2 BR - hH G2 TIP CKT 2 1.2 2.6 RING CKT 2 +3aV CKT 2 GROUND CKT 2 WH - SL T3 TIP CKT 3 1.3 2.7 SL - WH R3 RING CKT 3 R - BL +3 +3aV CKT3 BL - R G3 GROUND CKT 3 3: 6 32 R - OR T4 TIP CKT 4 1.4 2.8 7 OR - R R4 RING CKT 4 33 R - GN +I +3aV CKT 4 a GN - R G4 GROUND CKT 4 34 R - BR T5 TIP CKT 5 1.5 3.1 9 BR - R R5 RING CKT 5 35 R - SL +5 +38V CKT 5 10 SL - R GS GROUND CKT 5 TIP CKT 6 1.6 3.2 RING CKT 6 +38V CKT 6 GROUND CKT 6 TIP CKT 7 1.7 3.3 RING CKT 7 +38V CKT 7 GROUND CKT 7 36 BK - BL T6 11 BL - BK R6 37 BK - OR +6 12 OR - BK G6 38 13 39 14 40 15 41 16 42 17 43 18 44 19 45 20 46 21 47 22 48 23 49 24 Cable Pair Terminal Designation BK - GN GN - Bti BK - BR BR - BK BK - SL SL - BK Y - BL BL - Y T7 R7 +7 G7 T8 R8 - +a Ga Y - OR OR - Y Y - GN GN - Y T9 R9 4-9 G9 Y - BR TlO BR - Y R10 Y - SL +10 SL - Y G10 V - BL Tll BL - V Rll V - OR +11 OR - V Gil V - GN T12 GN - V R12 V - BR +12 BR - V G12 Function Station Circuit Number TIP CKT 8 1.8 3.4 RING CXT a +3aV CKT a GROUND CKT 8 TIP CKT 9 2.1 3.5 RING CKT 9 .I +3av cKT 9 GROUND CKT 9 I.. : TIP CKT 10 2.2 3.6 RING CKT 10 +3SV CKT 10 GROUND CKT 10 TIP CKT 11 2.3 3.7 RING CKT 11 +3aV CKT 11 GROUND CKT 11 TIP CKT 12 2.4 3.8 RING CKT 12 _. +3aV CKT 12 , GROUND CKT 12 . Page 3-10
INTER-TEL PRACTICES INSTAJAATION 824 INSTALLATION & MAINTEiNANCE Issue 1, June 1984 1 c. CONNECTING DOOR-MATES AND EXTERHAL EQUIPMEWT TO THE MDF 4.06 The MDF PCB has a Miscellaneous connector which provides the interface from the KSU to the MDF for Door-Mates, the FAX line monitor, external paging equipment, three remote contacts, the Master-Tel connection, and the KSU frame ground. Refer to SYSTEM SPECIFICATIONS for descriptions of these features. 4.07 To connect the equipment to the MDF, refer to Figure 3-6 on the next page. Then proceed as follows: (1) Terminate the equipment on the right side of the MISC block. (2) Make an interface cable to connect the MISC block to the KSU. Use 25-pair cable long enough to reach. a. Attach a female 25-pair amphenol connector to the KSU end of the cable. Label both ends. b. Connect the other end to the left side of the MISC block. I C. Leave the MDF PCB end of the cable hanging until the KSU is installed. _ (3) Install bridging clips ,- ., for all connections except the Door-Mates. 1, Page 3-11
INTER-TEL PRACTICES INSTALLATION 824 INSTALLATION S MAINTENANCE Issue 1, June 1984 ;i . . FIGURE 3-6. MISCELLANEOUS TERMINATIONS ON THE MISC BLOCK MDF PART OF MISC --- --- --- we- --- a-- --- --- \iPU RTN 1 PAM ZONE 9 1 -J --- --- --- 40 SK/SL 15 SL/BU ‘ll Y/ F11 --- -a- --- --- -a- --- --- --- --- --- --- --- --- --- --- MISC CONNECTOR ON THE MOF PC0 ---- ---- -a-- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- ---- +&i-j MASTERTEL j 45 20 ,46 21 47 22 46 23 49 34 r . Page 3-i2
INTER-TEL PRACTICES INSTALLATION 824 INSTALLATION & MAINTENANCE Issue 1, June 1984 D. LOOP RESISTANCE TESTS 4.08 Keysets must not exceed the loop limit of 800 feet or 40 ohms, using 24 AWG wire. The loop limit applies to any station, even with a Power Failure Transfer keyset. Door-Mate units must not exceed loop limits of 400 feet or 20 ohms. 4.09 Excessive and/or high resistance connections reduce the cable lengths. Using larger gauge (smaller AWG number) or multiple 24 AWG wires for the power pair increases these cable lengths. Both pairs must maintain proper loops. Station Loop Resistance Test (1) Ensure bridging clips have not been installed at the MDF and there are no keysets connected to the cables being tested. (2) Place a short across the RED and GREEN wires on the modu- lar jack. (3) On the- KTI block of the MDF, measure across the WHITE/- BLUE BLUE/WHITE pair. (4) This should read under 40 ohms. If it is higher, use heavier gauge wire or double up by running another pair. (5) Remove the short after the test is complete. (6) Repeat this test for the other pair. Place a short across the YELLOW and BLACK wires on the jack and measure across the WHITE/ORANGE ORANGE/WHITE pair. Door-Mate Loop Resistance Test (1) Place a short across the two Door-Mate wires. (2) Measure the Door-Mates two wires on the MISC block of the MDF. (3) This should read under 20 ohms. If it is higher, use heavier gauge wire or double up by running.another pair. (4) Remove the short after the test is complete. Page 3-13
INTER-TEL PRACTICES INSTALLATION 824 INSTALLATION & MAINTENANCE Issue 1, June 1984 KTI Bridging Clips . 4.10 After testing the loop resistances and correcting cabling problems, complete the terminations on the MDF by placing bridg- ing clips on the KTI blocks and MISC block. ********************************************** * CAUTION * * Hot pre-wires are not permitted. Do not * * bridge cables with unequipped stations. * * Failure to comply may cause data errors, * * which in turn will cause the corresponding * * KTI PCB to reset repeatedly. * *******************t************************** . Page 3-14
INTER-TEL PRACTICES INSTALLATION 824 INSTALL.ATION & IlAINTENANCE Issue 1, June 1984 5. KEY SERVICE UNIT (KSU) INSTALLATION 5.01 This section includes the following; A. Unpack the Equipment B. Power Supply Installation C. Printed Circuit Board (PCB) Installation D. Complete the KSU Installation A. UNPACK THE EQUIPMENT (1) Unpack the equipment, check it against the packing slip, and inspect it for damage. If equipment is missing or damaged, contact Inter-Tels Order Processing Department immediately. (2) Check all PCB assemblies as follows: a. b. e. f. Handle all PCBs by the edges only. They contain static-sensitive components. Check the solder side of each PCB. Remove any ship- ping foam or tape attached. Inspect each PCB for shorted components. ., All PCBs except for the Central Processor Unit (CPU).. ~ PCB are fully loaded. If any circuits are missing, contact Inter-Tels Field Service Department. The CPU PCB has five EPROMS. Socket U32 should be empty. Check that the EPROMS are in the sequential positions shown in Figure 3-10 on page 3-23. Return all PCBs totheir protective anti-static bags until they are installed in the KSU. B. POWER SUPPLY INSTALLATION .- -,, :‘ I:. ,,, .._.. 5.02 The power supply assembly is shipped installed in the sys- tem. Instructions are given for installation in case replacement is necessary. ********************************************* * CAUTION * * Take care when working inside the KSU. * * There may be live voltages. * ********************************************* Paqe 3-15
INTER-TEL PRACTICES INSTALLATION 824 INSTALLATION & MAINTENANCE Issue 1, June 1984 Installation (1) Remove the KSUs cover by removing two screws at the top, two screws at the bottom, and lifting it off. (2) If the power supply is shipped installed in the cabinet, make sure all connections are correct. 3-7 and 3-8 on the following pages. Refer to Figures OR, (3) If a. b. C. d. e. the power supply is not installed: Remove the two screws at the bottom of the cabinet. From the front, slide the power supply assembly into the lower right corner of the cabinet. Secure it with the two screws. Refer to SYSTEM SPECIFICATIONS, Figure 2-6, page 2-17. Connect the power supply cable from the power supply unit to the backplane terminals, located on the right side of the KSU. Refer to Figure 3-8 on page 3-18. Label Wire GND (+24V) Blue GND (+5V) Grey +5v Yellow -24V Orange NOTE: Each connection also has a Grey wire which leads to the noise filter on the side of the KSU. Double check all connections to make sure they are correct. The AC power cord enters from the bottom front and connects behind the switch panel. It is held in place by a plastic stress relief strap. Refer to Figure 3-7. Page 3-16
INTER-TEL PRACTICES INSTALLATION 824 INSTALLATION & MAINTENANCE Issue 1, June 1984 FIGURE 3-7. SYSTEM POWER SUPPLY d ‘SKTI 2 478KTI 3 k&SC bOOR /; BATTERY BACKUP SELECT SWITCH-.- .-_ ._._ A 3 (-) EXTERNAL BATTERY CONNECTION (+) EXTERNAL BATTERY POWER FAILURE ALARM CONNECTION CONTACTS Page 3-17
INTER-TEL PRACTICES 824 INSTALLATION & MAINTENANCE INSTALLATION Issue 1, June 1984 ‘: .I FIGURE 3-8. POWER SUPPLY CONNECTIONS ON TBE BACKPLANE A +24V GROUND n 3 +5v +5 V GROUND +24V Page 3-18
INTER-TEL PRACTICES INSTALLATION 824 INSTALLATION 6r MAINTENANCE Issue 1, June 1984 i Power Supply Electrical Test (1) (2) (3) (4) (5) (6) t (7) Make sure the power supply 6A 250V fuse is in good work- ing order. The power supply ON/OFF switch must be in the OFF posi- tion. Also make sure there are no PCBs installed in the cardfile at this time. Plug the power cord into the dedicated 105-125VAC, 60Hz outlet. Set the ON/OFF switch to the ON position. Locate the test points on the right side of the back- plane. Using a digital voltmeter, measure the voltages. Refer to Figure 3-8. Ensure the following tolerances: Voltages Range +24VDC 23.5V to 27.5V +5VDC 4.9v to 5.1v If the readings are not within the tolerances, DO NOT PROCEED. COntaCt Inter-Tels Field Service Department for assistance. If the voltages are within the specified limits, turn off the power and unplug the AC power cord. Groundinq Requirements 5.03 The KSU power cord should be connected to its dedicated AC circuit. Proceed as follows: (1) (2) (3) (4) Mount a Grounding Terminal on the MDF backboard. Run a solid #lO gauge wire from a cold-water pipe ground to the Grounding Terminal. Run a #lo gauge wire from the KSU Frame Ground to the Grounding Terminal. Refer to Figure 3-18 on page 3-35. COnneCt the Frame Ground from the MISC connection block to the Grounding Terminal. Refer to Figure 3-6 on page 3-12. Page 3-19