Intermec EasyCoder 4420 User Manual page 121

Appendix C — Communications Reference
X84101u\1cu\
X84101u\1cu\
102
25-Pin (Socket) D-Sub
Metal Backshell
Chassis Ground
Transmitted Data
Received Data
Request to Send
Clear to Send
20
Data Terminal Ready
Signal Ground
Printer
Straight Through DTE to DCE Cable:
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
+
13
Input RxDB
-
16
Input RxDA
-
14
Output TxDA
+
19
Output TxDB
Printer
This illustration shows the pin assignments for the RS-422
RS-422 serial interface:
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
1
2 ➤
➤
3
4
➤
➤
5
➤
7
This illustration shows the pin assignments for
Shield
➤
➤
44XXU077.eps
25-Pin (Plug) D-Sub
Metal Backshell
1 Chassis Ground
Transmitted Data
2
Received Data
3
Request to Send
4
5
Clear to Send
20
Data Terminal Ready
7
Signal Ground
Modem
44XXU076.eps
1
19
14
16
13
Host