ThingMagic M5e - Manual (Page 7)

4 Port Multiplexer Board
6 Accessory Board Configuration
M5e Control (Block 23)
The Multiplexer can be controlled using the M5e GPOutput lines by connecting the ribbon
cable between the M5e and the Multiplexer board and adding jumpers on the terminal
pins, connecting MUX2 with OUT2 and MUX1 with OUT1.
This method allows the M5e to use its built-in support for (up to 8) multiplexed antennas.
This enables automatic control of GPO to MUX signals to switch ports based on the M5e
logical antenna setting and association of tag read information with the corresponding
antenna ID meta data.
When using the M5e built-in multiplexer support the ports are also identified by pre-
defined logical port numbers - this requires M5e firmware version 1.3.0 or later. In a
stacked configuration, multiplexers are installed upside-down relative to the M5e board.
Assuming that the multiplexer closest to the M5e is connected to M5e port 1 and the one
farthest is connected to M5e port 2, the logical port numbers would be as shown here: