Intermec EasyCoder F2 – User’s Guide
103
Appendix 3
Interfaces
"uart3:" Serial Port
Communication port "uart3:" uses a DB-25pin male connector.
Pin Signal
Name Description
1
Not
connected
2 TxD
RS-232
Transmitter
3 RxD
RS-232
Receiver
4
RTS
RS-232 Request To Send
5
CTS
RS-232 Clear To Send
6
DSR
RS-232 Data Set Ready
7 GND
Ground
8
Not
connected
9
+20M1
+20 mA current loop
10
-20M1
-20 mA current loop
11
+TXD
+TXD 20 mA current loop
12
-TXD
-TXD 20 mA current loop
13
+20M2
+20 mA current loop (printer active receiver)
14
-20M2
-20 mA current loop (printer active receiver)
15 +RS422I
+RS-422
Receive
16
+5V
5 Volt for external use (max. 200 mA)
1
17 -RS422I
-RS-422
Receive
18
+RxD
+TXD 20 mA current loop
19 +RS422O
+RS
-422
Transmit
20
DTR
RS-232 Data Terminal Ready
21 -RS422O
-RS-422
Transmit
22
RI
RS-232 Ring Indicator
23
Shield
Optional shield for RS-422
24
Not
connected
25
-RxD
-TXD 20 mA current loop
1
/. The external 5V is automatically switched off at overload.
Double Serial Interface Board, cont.
"uart3:"