Intermec EasyCoder 4420 User Manual page 131

Straight Through DTE to DCE Cable for Use with a Modem (Part No. 043237S)
25-PIN (PLUG) D-SUB
METAL BACKSHELL
CHASSIS GROUND
TRANSMITTED DATA
RECEIVED DATA
REQUEST TO SEND
CLEAR TO SEND
DATA TERMINAL READY
SIGNAL GROUND
Note: 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.
RS-422 Intermec Pin Assignments
Note: The host in this case includes Intermec products that support RS-422. Non-
Intermec controllers may have different pin assignments.
1
2
3
4
5
20
7
PRINTER
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
Communications Reference
SHIELD
1
➤
2
➤
3
➤
4
➤
5
➤
20
7
MODEM
SHIELD
1
➤
19
➤
14
➤
16
➤
13
HOST
C
25-PIN (PLUG) D-SUB
METAL BACKSHELL
CHASSIS GROUND
TRANSMITTED DATA
RECEIVED DATA
REQUEST TO SEND
CLEAR TO SEND
DATA TERMINAL READY
SIGNAL GROUND
44XXU076.eps
NOTE: Connect pin 1 to shield
at one end only.
44XXU077.eps
C-13