User's Manual

C827 REFERENCE MANUAL
14
4
4.3 RS232 SERIAL CONNECTIONS
The connections for the RS232 interface are RS232 TX (data from the C827), RS232 RX
(data to the C827), and Ground or Signal GND it depends on selected Isolated/not isolated
connection type.
The signals and electrical loads from the RS232 TX and RS232 RX pins should conform to
the electrical specifications of EIA Standard RS232. The maximum cable length specified
under this standard is 15m. (50 feet). High quality shielded cable should be used for these
connections.
Table 4-1 gives the connections required to establish RS232 communications between the
reader/writer and an RS232 host.
Table 4-1: Serial/power connector pinouts
C827
Terminal
Description RS232
not isolated
Description RS232
isolated
RS232
Host, DE9
RS232 Host,
DB25
1 Signal GND Signal GND N/C N/C
2 RS232 RX RS232 RX DE9 pin 3 DB25 pin 2
3 VDC VDC N/C N/C
4 RS232 TX RS232 TX DE9 pin 2 DB25 pin 3
5 Signal GND, GND GND DE9 pin 5 DB25 pin 7