Unitronics VisionV120-22-UN2 User Manual page 16

Opening the controller
1. Turn power off before opening the controller.
2. Locate the 4 slots on the sides of the controller.
3. Using the blade of a flat-bladed screwdriver, gently
pry off the back of the controller.
4. Gently remove the top PCB board:
a. Use one hand to hold the top-most PCB board
by its top and bottom connectors.
b. With the other hand, grasp the controller, while
keeping hold of the serial ports; this will keep
the bottom board from being removed together
with the top board.
c. Steadily pull the top board off.
5. Locate the jumpers, and then change the jumper
settings as required.
6. Gently replace the PCB board. Make certain that the
pins fit correctly into their matching receptacle.
a. Do not force the board into place; doing so
may damage the controller.
7. Close the controller by snapping the plastic cover
back in its place. If the card is placed correctly, the
cover will snap on easily.
Installation Guide
16