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G3NH-2075B Datasheet(PDF) 4 Page - Omron Electronics LLC |
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G3NH-2075B Datasheet(HTML) 4 Page - Omron Electronics LLC |
4 / 5 page Solid State Relays G3NH 201 Replacement Be sure to turn off the power before replacement. 1. First, remove the four screws (shown below as “A”) and the transparent protective cover from the relay housing and then disconnect the wiring. 2. Remove the four screws (shown in the following as “B”) and the nameplate from the relay housing. 3. Remove the three screws (shown in the following as “C”) from inside the housing and pull the Base Assembly up to detach. (The Base Assembly cannot be removed thoroughly because of the leads connected to the base.) 4. When the Base Assembly is detached, you will see the leads connected to the built-in thyristor module. Pull the connector to disconnect the leads. At this point, if any defect exists in any of the electronic components on the PWB, the SSR may fail again even after the replacement of the built-in thyristor module. In such a case, consult OMRON about appropriate remedial action. 5. Remove the two screws (shown in the following as “D”) and take out the built-in thyristor module. Assembly of the thyristor module must be performed in the exact reverse order of the previous disassembly steps 1 to 5. 6. Before mounting the new thyristor module for replacement, wipe off the silicone grease adhering to the heat sink, keep clean the jointing surfaces of the heat sink and thyristor module, and apply the new grease (supplied as an accessory) to the jointing surfaces. Secure the thyristor module to the heat sink with the two screws “D” and tighten each screw to a torque of 2.45 to 2.94 N·m. 7. Connect the thyristor module to the PWB with the socket. (The socket may be inserted in either direction.) Assemble the Base Assembly with the heat sink by aligning the PWB with the PWB securing groove and the protective cover with the protective cover securing groove, respectively, while exercising caution not to get any of the leads caught between the Base Assembly and the heat sink. 8. Secure the Base Assembly with the three screws “C”. Because a large current flows into these screw parts, make sure that any of the screws is not clogged with foreign matter and tighten each screw to a torque of 4.41 to 4.90 N·m. 9. Check the assembled parts again for any lead caught between the Base Assembly and heat sink and for proper fitting of the PWB and protective cover into their respective securing grooves. Then, replace the nameplate and secure it with the four screws “B”. 10.Complete the wiring and secure the protective cover with the four screws “A”. 11.Apply power to the relay and check the relay for proper operation. A A A A B B B B Name plate C Base Connector Protection cover PWB Connecting to thyristor module Protection cover securing groove D D PWB securing groove Heat sink |
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