There is not enough room on the CPLD to hold both, the transmitter and the receiver. To enable transfer of limit switch signals from receivers back to transmitter, there would also need to be an additional optical receiver implemented on the transmitter PCB's CPLD. This problem can be solved by stacking two transcievers one over another. Firmware for the second transciever is currently under development.
There is not enough room on the CPLD to hold both, the transmitter and the receiver. To enable transfer of limit switch signals from receivers back to transmitter, there would also need to be an additional optical receiver implemented on the transmitter PCB's CPLD. This problem can be solved by stacking two transcievers one over another. Firmware for the second transciever is currently under development.