Intermec EasyCoder 4420 User Manual page 114

Appendix C — Communications Reference
102
25-Pin (Socket) D-Sub
Metal Backshell
Chassis Ground 1
Transmitted Data 2
Received Data
3
Request to Send 4
Clear to Send
5
Data Terminal Ready
20
7
Signal Ground
Printer
Straight Through DTE to DCE Cable: This illustration shows the pin assignments for
the straight through DTE to DCE cable used with a modem (P/N 043237S). If you find
that you are losing data, you may need to isolate the chassis ground from one of the
two devices by connecting it to the shield.
Note: The metal backshell is connected directly to the shield to achieve
electrostatic discharge (ESD) immunity.
1
+
Input RxDB 13
-
16
Input RxDA
-
14
Output TxDA
+
Output TxDB 19
Printer
RS-422 serial interface: This illustration shows the pin assignments for the RS-422
serial interface. The host in this case includes Intermec products that support RS-422.
Non-Intermec controllers may have different pin assignments.
Note: Connect pin 1 to shield at one end only.
EasyCoder 4420 and 4440 Bar Code Label Printer User's Manual
Shield
➤
➤
➤
➤
➤
Shield
1
➤
19
➤
14
➤
16
➤
13
Host
44XXU077.eps
25-Pin (Plug) D-Sub
Metal Backshell
Chassis Ground
1
Transmitted Data
2
Received Data
3
4 Request to Send
5 Clear to Send
20 Data Terminal Ready
7 Signal Ground
Modem
44XXU076.eps