Impulse 2223-OEM - Manual (Page 11)

Echo
The RS-485 ‘Echo’ is the result of connecting the receiver inputs to the transmitter
outputs. Each time a character is transmitted; it is also received. This can be
beneficial if the software can handle echoing (i.e. using received characters to
throttle the transmitter), but it can also confuse the system if the software cannot
support echoing.
Echo configuration is software selectable for half-duplex RS-485. By default, ECHO
is disabled, and this configuration can be set by placing a check next to ‘Enable
Echo’ in the ‘RS-485 Advanced Configuration’ field, as pictured below.
© Sealevel Systems, Inc. - 9 - SeaLINK+2.SC User Manual