Rs-232 Serial Interface - Intermec EasyCoder 4420 User Manual

RS-232 Serial Interface

RS-422 Serial Interface
RS-485 Serial Interface
RS-232, RS-422, and RS-485 Serial Interface Pin Assignments
Interface Pin
RS-232/422/485 1
RS-232 2
RS-232 3
RS-232/422/485 4
RS-232/422/485 5
EasyCoder 4420 and 4440 Bar Code Label Printer User's Manual
The parallel port conforms to the IEEE 1284 standard and it supports
Initialization, Compatibility Mode, Negotiation, Nibble, and Byte Mode
for reverse data transfer.
The serial port supports serial communications with the following
interfaces:
• RS-232
• RS-422
• RS-485
The following sections describe these interfaces. See the Data
Communications Reference Manual (P/N 044737) for more detailed
information.
Use the RS-232 serial interface in all asynchronous point-to-point full- or
half-duplex direct data communications or modem control. The printer
cable must have the pin assignments for an RS-232 serial interface shown
in the next table.
Use the RS-422 interface in long line point-to-point direct connect
installations. The printer cable must have the pin assignments for an RS-
422 serial interface shown in the next table.
Use the RS-485 serial interface for Multi-Drop installations only. The
printer cable must have the pin assignments for an RS-485 serial interface
shown in the next table.
Name
Chassis Ground
(GND)
Transmit Data
(TD)
Receive Data
(RD)
Request to Send
(RTS)
Clear to Send
(CTS)
Appendix C — Communications Reference
Operation
Connect to pin 1, chassis ground, of connected device.
Output: Connect to receive data pin of connected device.
Input: Connect to transmit data pin of connected device.
Output: When you use a modem, connect to modem RTS pin.
The connection sets RTS to true before transmission. The printer
sets RTS to false after transmission.
Input: When you use a modem, connect to modem CTS pin.
Modem must set CTS true before the printer transmits data. If not
connected, CTS sets itself true.
99