Omron CPM2C Operation Manual page 87

3-4-9 No-Protocol Communications
The TXD(48) and RXD(47) instructions can be used in no-protocol mode to ex-
change data with standard serial devices. For example, data can be received
from a bar code reader or transmitted to a serial printer. The serial devices can
be connected to the RS-232C port or Peripheral port, as shown in the following
diagrams.
RS-232C devices


Bar code reader


Serial printer

Other serial device
Note See One-to-one Computer Connections on page 69 for details on the system
configurations that can be assembled for serial communications.
Section 3-4
CPM2C CPU Unit