
G 120 II V
Page 78
1st Edition, Rev. 0 Chg. 2
6.4.2
Replacing the PLC
Replacing the PLC does not require removal of any wiring as the connections are made with push in Con-
nector Blocks. To replace the PLC proceed as follows.
1. Turn off unit and disconnect from main power supply.
2. Lift the Input Connections Cover. See Figure 6-3, Item 5.
3. Insert a small flat bladed screwdriver in the notch in the back center of the Connector Block. Gently
pry the Connector Block loose. See Figure 6-4.
4. Repeat Steps 2 and 3 for the to the Connector Block on the Output side of the PLC.
5. The Power Connector on the side opposite side from the DIN Rail Clip, Figure 6-3, Item 7, is
removed by pulling it straight out from the PLC.
6. Unclip the PLC from the DIN Rail by using a small flat bladed screwdriver to pull the DIN Rail
Clip out until the PLC is free.
7. Replace the PLC and slide the DIN Rail Clip in with the screwdriver until it is secure.
8. Replace the Power Connector by pushing it into the socket in the side of the PLC.
9. The Connector Blocks are replaced by pushing them gently down onto corresponding pins until
they click into place.
10. Restore power and operate the unit.
6.4.3
Installing a New Program
The PLC program can be updated in two ways. If a Bauer technician is on-site, they will connect directly
to the PLC using a notebook computer. Another method to install a new program is to use an External
EEPROM cartridge. The EEPROM would be programmed at the Bauer factory and shipped either to the
customer or to a authorized distributor.
6.4.4
Installing an EEPROM
To install or replace an EEPROM Cartridge proceed as follows:
1. Turn off unit and disconnect from main power supply.
2. Lift straight up to remove the EEPROM cover. Keep the cover. See Figure 6-3, Item 9.
3. The EEPROM is keyed to fit only one way and requires minimal force to insert it.
4. Push the EEPROM down until it snaps into place.
5. If the EEPROM is being retained in the PLC, restore power to the unit and operate as normal.
6. If the EEPROM is for a software update and is to be returned to Bauer or a distributor continue as
follows.
7. Restore power to the unit.
8. After the software has initialized and the Home Screen is displayed, shutdown the unit and discon-
nect from the main power source.
9. Restore power to the unit. After the software has initialized a second time and the Home Screen is
displayed, shutdown the unit and disconnect from the main power source.
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