Replacing D-Type Boards; Replacing J-Type Boards; Replacing Other S-Type Boards; To Replace The S-Type Terminal Board - GE Mark VIeS System Manual

12.2.1.5 Replacing D-type Boards

➢ ➢ To replace the board
1. Lockout and/or tag out the field equipment and isolate the power source.
2. Unplug the I/O cable (J-plugs).
Disconnect all field wire and thermocouples along with shield wire.
3.
4. Remove the terminal board and install the new board.
5. Reconnect all field wire and thermocouples as before.
6. Plug the I/O cable (J-plug) back.

12.2.1.6 Replacing J-type Boards

1. Lockout and/or tag out the field equipment and isolate the power source.
2. Check the voltage on each terminal to ensure no voltage is present.
3. Verify the label and unplug all connectors.
Loosen the two screws on each of the terminal blocks and remove the top portion leaving all field wiring in place. If
4.
necessary, tie the block to the side out of the way.
5. Remove the mounting screws and the terminal board.
Install a new terminal board. Check that all jumpers, if applicable, are in the same position as the ones on the old board.
6.
7. Tighten it securely to the cabinet.
8. Replace the top portion of the terminal blocks and secure it with the screws on each end. Ensure all field wiring is secure.
9. Plug in all wiring connectors.

12.2.1.7 Replacing Other S-type Boards

➢ ➢ To replace the S-type terminal board
Perform lockout/tagout procedures and isolate the power sources.
1.
2. Check the voltage on each terminal to ensure that there is no voltage present.
3. Unplug the I/O cable (J-plugs)
4. If applicable, unplug JF1, JF2, and JG1.
If applicable, remove the TB3 power cables.
5.
6. If removable terminal block, gently pry the segment of the terminal block containing the field wiring away from the part
attached to the terminal board, leaving the wiring in place. If necessary, tie the block to the side out of the way.
Remove the mounting screws and terminal board.
7.
8. Install a new terminal board. Check to ensure that all jumpers (if applicable) are in the same position as the ones on the
old board.
9. Tighten it securely to the cabinet.
10. If removable terminal block, from the new board, gently pry the segment of the terminal block that would contain the
field wiring away from the part attached to the terminal. Then, slide the segment containing the field wiring from the old
board into the new terminal block. Ensure that the numbers on the segment with the field wires match the numbers on the
terminal block. Press together firmly. Ensure that all field wiring is secure.
482 GEH-6855_Vol_II GEH-6855_Vol_II Mark VIeS Functional Safety Systems Volume II
Public Information