SERIES SIX PROGRAMMABLE GEK-90762 CONTROLLERS 24V dc INPUT HIGH CAPACITY I/0 RACK POWER SUPPLY GENERAL The 24 V dc I/O Power Supply, which provides power for Series Six I/O modules, directly replaces a 115 V ac input high capacity I/O Power Supply should a change in source voltage become necessary or desirable. This power supply is a High Capacity model and does not substitute for a Standard I/O Power Supply. The 24 V dc Input High Capacity I/O power features and benefits are supply in Table 1. This supply summarized provides regulated +5V, +12V and -12 V dc to the I/O rack backplane. The High Capacity power supply provides power for high current I/O module configurations and remote (with modem) I/O applications. Source Voltage : 20 TO 32 V dc Output Vol tage: +5, +12, -12 Vdc DESCRIPTION fuse to a switching power supply. For a given load the input power drain is essentially constant. The power supply is protected against polarity reversal of the dc input. On the front pane! of the I/O rack power supply is an ON/OFF switch labeled, LOGIC POWER; visible through a lens is a Light-Emitting Diode (LED) that lights when the LOGIC POWER switch is in the ON posit ion; and underneath a black plastic cover is a source voltage terminal block. The I/O rack power supply also generates a power-fail signal (PSOK) which is used for system initialization and error indications- The 24 V dc High Capacity I/O power Refer to Table 2 (next page) for the High input voltages operates with supply l/O rack power Capacity ranging from 20 to 32 V dc. The input supply specifications. power is applied to a terminal block on the front panel, then routed through a switch and Table 1 FEATURES AND BENEFITS FEATURES Input voltage can be 20 to 32 V dc BENEFITS Can be used with dc power sources POWER indicator on front panel. Simplified troubleshooting. Power-fail signal supplied to I/O rack to generate system failure indications. Wide variety of output power combinations. TM Trademark of General Electric Company. Useful in a variety of applications more properly satisfy I/O rack power requirements. GEK-90762 24 V dc Input High Capacity I/O Rack Power Supply 1. Main-Circuit-Board Terminal 1-3 Strip 2. Ground Terminal 3. Auxiliary-Circuit-Board Connector 4. Front-Panel Connector Block 5. Power Switch 6. Fuse 7. POWER Light On: The voltage levels of all three DC outputs (+12V, -12V, +5V) are within tolerance. Off: At least one of these voltage levels is too low. Figure 1 USER ITEMS (Part 2 of 2) INSTALLATION Verify that the 24 V dc High Capacity installed power supply to be accomodate the estimated load. Total current units as indicated in Table 3, the I/O modules to be used. I/O can the per 1. Stop the system by switching the top key on the CPU to STOP. 2. Switch off all units in the system, including the user’s power supplies. Input power requirements are a function of load. T y p i c a l e f f i c i e n c y a t f u l l l o a d i s approximately twice the estimated toad power as determined from Table 3. 3. Remove all power from the system, preferably at the source (i.e. throw the main circuit breaker for the system). Verify that the dc input lines are of the correct polarity before applying power. An inadvertant reversal of input polarity will cause the supply to draw excessive currents and may blow an internal 8A slo-blow fuse. This fuse must then be replaced and the input polarity reversed before proper operation can be attained. 4. Locate the I/O rack power supply to be changed. The power supply is in the far right side of the I/O rack. These steps define the procedures to be followed when a power supply is to be replaced on a Series Six I/O rack. The tools needed are a regular screwdriver, and a 5/16” wrench or nut driver. 6. Take note of the location and color of the input wires and then remove them. 5. Remove the plastic cover on the lower port ion of the power supply and, using a voltmeter, make sure there is no input power present. GEK-90762 24 V dc Input High Capacity I/O Rack Power Supply 7. At the top and bottom of the are quarter there supply 9 thumbscrews. To loosen, turn thumbscrews approximately l/4 counterclockwise. power 11. turn the turn 8. Grasp the thumbscrews and gently pull outward. Be careful not to damage the internal wiring while pulling the supply out. Pull the power supply completely out. 12. 9. Locate the wires that extend from the back of the I/O rack to the terminal on the power supply. These wires should be labeled or stamped with 13. their location; the circuit boards have wire locations stamped on them also. (Refer to Figure 3.) Remove these wires. These is also a plastic wire clamp holding these wires in place. Detach this from the frame if there is 14. not a similar item on the replacement power supply, or cut the clamp if there is one on the new supply. IO. Remove the Molex connector that is on the narrow board in the front part o f t h e p o w e r s u p p l y . The power supply should n o w b e c o m p l e t e l y detached from the I/O rack. 15. l-4 Take the replacement power supply and attach the wires as shown in Figure 3. Be sure to connect the molex connector (PI) to the power supply * Attach the wire clamp on the uppper stud of the power supply frame, or if there is a clamp already there, wrap the wires in it. Slide the power supply into the rack, being careful not to damage the wires. When the power supply is all the way in, turn the thumbscrews clockwise until they lock in. Remove the plastic cover on the lower portion of the power supply and attach the Input wires as they were on the original supply (Refer to Step 6). Replace the plastic cover. Restore system power. Turn on the I/O rack. Check to see if the POWER light is on. If it is , turn on the rest of the system and resume normal operation. If the POWER light does not come on, the power supply is bad or there are other problems within the I/O rack. When this occurs, you can call your local authorized General Electric Programmable Control Distributor or your local General Electric Sales office for assistance. 1-7 GEK-90762 24 V dc Input High Capacity I/O Rack Power Supply ORDERING INFORMATION 24 Vdc Input High Capacity I/O Rack Power Supply I C6OOPM542 This symbol on the nameplate means the product is listed by Underwriters Laboratories Inc. (UL Standard No. 508, Industrial Control Equipment, subsection Electronic Power Conversion Equipment.) For further information, contact your local GE Fanuc sales office. GE FANUC AUTOMATION NORTH AMERICA, INC., CHARLOTTESVILLE, VIRGINIA November 1986
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