User`s manual
XP8600/XP890086 s Connecting and Mounting Multiple Boards
Connecting Multiple Boards
Eight or more XP8600 expansion boards and eight XP8900 Series
expansion boards may be connected (daisy chained) at one time. Be
sure that each board has a unique address to prevent communication
problems between the controller and the expansion board.
Follow these steps when installing several expansion boards on a single
PLCBus.
1. Make sure all expansion boards are orientated right side up.
2. Use the ribbon cable supplied with the boards.
3. Connect one board to the main controller.
4. Connect another expansion board to the first expansion board, connect-
ing each boards header P1 to the adjacent boards header P2.
5. Add expansion boards side-by-side until the daisy chain is complete.
Figure C-1 shows an example of daisy chained connections.
Figure C-1. Example of Daisy Chain Connections
Do not twist the ribbon cable or mount the expansion boards
upside down! Damage may occur. Be sure Pin 1 of P1 and P2
of each board matches up with Pin 1 of the previous board.
Pin 1 should be at the lower right when the expansion board is
right side up, that is, the board markings are right side up.
When several expansion boards are connected, there may be a voltage
drop along the network of expansion boards. No action is necessary as
long as the digital voltage, VCC, is greater than 4.9 V on the last board.
VCC can be measured at pin 2 on header P1, and GND is pin 1
on header P1.
P1
J2
J1
EPROM
RAM
PIO
Z180
XP8600
XP8400 Controller
Relay 0
Relay 2
Relay 4
Relay 5
Relay 7
Relay 1
Relay 3
Relay 6
!