Serial/Industrial Interface Kit Installation Instructions 19
3
Serial Interface "uart2:",
"uart3:", and "uart4:"
is chapter describes how to modify the interface
board for RS-232 non-isolated (standard), RS-422
isolated/full duplex, or RS-485 isolated/half duplex
on the "uart2:", "uart3:", or "uart4:" port and
explains the confi guration of the interface connector.
When fi tting driver circuit and straps
before installing the interface board,
make sure that the circuit is not fi tted
upside down (see front end markings in
the illustrations). Also make sure that the
“legs” of the circuit fi t into the slots in
the socket and are not bent. Take ample
precautions to protect the board and cir-
cuits from electrostatic discharges.
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