Each SIM-board can be connected to other SIM-boards you may own to form a larger SIM-board "stack". As each SIM-board is designed to interface with a specific type of hardware, this larger "stack" philosophy allows you to interface with multiple types of hardware within your cockpit project.

To connect multiple SIM-boards together:

• ensure the 8 hexagonal spacers (supplied) are fitted to each corner of each board. Screw the head of one spacer into the tail of the other spacer such that the SIM-board is held secure between the two spacers at each corner of the board
  
• gently stack the SIM-boards on top of each other, ensuring the spacers of the next board rest gently on the screw head of the previous board's spacers
  
• if desired, screw the spacers of adjoining SIM-boards together to form a more secure and permanent structure. Otherwise, ensure the boards do not slip or fall if maintaining an un-fixed stack.
  
• using the inter-board ribbon cable connector (supplied) fix it to the bottom-most board in your stack on the connection marked "OUTGOING (to next)".
  
• fold the cable up to the level of the next SIM-board in the stack, making sure the cable is never twisted from side-to-side
  
• connect the other end of the cable to this next SIM-board on the connection marked "INCOMING (from prev)"
  
• repeat the previous 3 steps to sequentially connect all the boards in your stack

After connecting all your SIM-boards in this manner, you should have an untwisted inter-board ribbon cable connection running from the "OUTGOING" pin connection of each board to the "INCOMING" pin connection of the board immediately above it in the stack. No connection will exist on the "INCOMING" pin connection of the bottom-most board, nor will any connection exist on the "OUTGOING" pin connection of the top-most board.

From now on, the "MASTER BOARD" is considered to be the bottom-most SIM-board in your stack. All other boards are considered "SLAVE" boards.

To connect your SIM-board stack to your PC:

• connect one end of the PC serial cable (supplied) to the SIM-board connector marked "PC SERIAL" on the MASTER SIM-board only
  
• connect the other end of the PC serial cable to an available serial port at the rear of your PC
  
• if your PC does not have a serial port available, you can purchase a USB-to-serial adaptor cable and connect the PC serial cable to this adapter instead, and plug the USB connection of the adaptor into a spare USB socket on your PC

To power up your SIM-board stack:

• ensure the finger-operated jumper switch marked "PWR SWITCH" is in the OFF position (slide the switch towards to board edge, away from the board center) for each board in the stack
  
• connect a suitable DC power source to the socket marked "PWR" on the MASTER SIM-board only (this DC power source should be fitted with a standard 2.1mm DC jack with positive voltage at the center)
  
• to switch on your board stack, position the "PWR SWITCH" on the MASTER SIM-board to the ON position (slide the switch towards to board center in the direction of the ON arrow on the switch)
  
• when switched on, each SIM-board in the stack will flash its green LED status indicator (located near the inter-board ribbon cable connections) momentarily and in board sequence from the MASTER board upwards. Once each SIM-board has been identified, the MASTER SIM-board green LED status indicator will flash on and off continuously while all other SIM-board green status indicators will extinguish

To check the SIM-boards can communicate with your PC:

• run the SIM-board Control Center application on your PC
  
• click the New Project button to start a new project
  
• click the Auto-Detect button to begin searching for the SIM-boards in your stack
  
• after a few seconds a list of boards that have been identified to be in your stack will be presented to you
  
• if this list is correct, click the "Create Project with these boards" button
  
• the SIM-board green LED status indicator will turn continuous green on all SIM-boards in the stack