Xylem Ai1 Series Quick Start Manual page 14

P_SW State
Off (0V)
On (5V)
These are commonly used to increase the C1/C2 pair from one serial port (0-5V
RS232) to two. The numbering is TX2/RX2 and TX3/RX3 so as to not be confused
with TX/RX already included by default. Within CRBasic these ports are connected
to Com1 depending on the P_SW state.
Miscellaneous
EXO SOA The electronics housing may include an EXO Signal Output Adapter (SOA) to
convert the proprietary EXO signal to an SDI12 output. This port connects to the
same labelled ports on the SOA. Refer to the SOA documentation for further
details.
Refer to the CR300 product manual
C1 connected to
Tx_2
Tx_3
Figure 8 - The battery plate fitted with a YSI EXO Signal output adapter
for more detailed specifications on the I/O and program functionality.
C2 connected to
Rx_2
Rx_3
TX_3
RX_3
YEL
WHY
RED
BLK