Intermec EasyCoder 501 E - Interfaces; Appendix 4 Standard Interface Uart1

Intermec EasyCoder 501 E – Installation & Operation Ed. 1 137
Appendix 4
Interfaces
Standard Interface
"uart1:"
"uart1:"
All EasyCoder 501 printer models are fi tted with a DB25pin male
interface connector on their rear plates (communication port
"uart1:"). This connector can be used for an RS-232, an RS-422, or
a 20 mA current loop interface depending on how the CPU board is
strapped. In the latter two cases, additional circuits must be fi tted. The
confi guration of the connection cable is also important.
If the printer is ordered without any connection cable, a suitable cable
can be procured locally and, if necessary, be modifi ed according to
the pinout descriptions in this chapter.
Signals on the printer's
communication port "uart1:"
UART is an abbreviation for Uni-
versal Asynchronous Receiver
and Transmitter
0
230V
GNDC
2
1
3
4
5
6
7
8
9
10
11
12
13
15
14
16
17
18
19
20
21
22
23
24
25
GNDC
TXD out
RXD in
RTS out
CTS in
DSR in
GNDI
+20 mA CL 1
-20 mA CL 1
+TXD
-TXD
+20 mA CL 2
GNDC
-20 mA CL 2
+RS-422 In
+5V Ext.
-RS-422 In
+RXD
+RS-422 Out
DTR out
-RS-422 Out
-RXD
IMPORTANT!
A shielded communication cable is required in order to comply
with the FCC/DOC approval and to avoid the risk of interference
to radio communications.