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EasyCoder 3400e Bar Code Label Printer User’s Manual
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RS-422 Serial Interface
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
table on this page.
RS-485 Serial Interface
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 table on this
page.
Interface
Pin No.
Name
Operation
RS-232/422/485
1
Chassis Ground
(GND)
Connect to pin 1, chassis ground, of connected device.
RS-232
2
Transmit Data
(TD)
Output: Connect to receive data pin of connected device.
RS-232
3
Receive Data
(RD)
Input: Connect to transmit data pin of connected device.
RS-232/422/485
4
Request to Send
(RTS)
Output: When you use a modem, connect to modem RTS pin.
The modem sets RTS to true before transmission. The printer
sets RTS to false after transmission.
RS-232/422/485
5
Clear to Send
(CTS)
Input: When you use a modem, connect to modem CTS pin. The
modem must set CTS true before the printer transmits data. If not
connected, CTS sets itself true.
RS-232/422/485
7
Signal Ground
(SG)
To enable communications, connect to signal ground of
connected device. Completes circuit for all RS-232 signals.
RS-232/422/485
11
Printer Status (PS)
Output: When not using software flow control (XON/XOFF),
connect to input of connected device (for example, CTS).
Indicates printer mechanical status and status of printer input
buffer.
RS-422/485
13
Input B
Input: Serial differential data to the printer.
RS-422/485
14
Output A
Output: Serial differential data from the printer.
RS-422/485
16
Input A
Input: Serial differential data to the printer.
RS-422/485
19
Output B
Output: Serial differential data from the printer.
RS-232/422/485
20
Data Terminal
Ready (DTR)
Output: When you use a modem, connect to modem DTR pin.
When using Intermec Standard Protocol, this pin indicates that
the printer is switched on.
When using XON/XOFF or hardware flow control, this pin
indicates the printer mechanical status and the status of the
printer input buffer.
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