Zebra Technologies R-140 - Manual (Page 110)

When the printer is connected via its RS-232 interface to Data
Communication Equipment (DCE) such as a modem, use a standard RS-232
(straight-through) interface cable. Figure 39 illustrates the connections
required for this cable.
Zebra R-140 User’s Guide 101
DB-25P
connector
to printer
DB-9S
connector
to computer
FG
TXD
RXD
RTS
DSR
SG
DTR
DCD
RXD
TXD
DTR
SG
DSR
RTS
CTS
RI
Figure 38
1
2
3
4
5
6
7
8
20
1
2
3
4
5
6
7
8
20
FG (frame ground)
DCE DTE
TXD (transmit data)
RXD (receive data)
RTS (request to send)
CTS (clear to send)
DSR (data set ready)
SG (signal ground)
CD (carrier detect)
DTR (data terminal ready)
NOTE: Pins 5, 8, 10, 12, 15, 17-18, 21-25 are not used and are unterminated.
Figure 39