Rs232 Connection - Hach DR/2010 Instrument Manual

4.2

RS232 Connection

Note: For
optimum
performance and
protection against
ESD, use a three
conductor
shielded cable.
Use a metal shell
for the printer or
CRT terminal
connector, and
connect the shield
of the cable to the
metal shell and to
the sleeve (signal
ground) of the
RS232 plug.
DR/2010 9-pin D Connector Socket
Pin
2
3
4
5
6
7
8
6. If the rechargeable lead-acid battery is used, charge the battery for 18
to 20 hours to achieve optimum charge. Charging is recommended
before extensive use, but the battery is usable when received.
The RS232 receptacle on the back panel of the DR/2010
Spectrophotometer connects with a 9-pin Sub-D connector as indicated in
Figure 20. A suitable RS232 cable is listed under Optional Accessories in
REPLACEMENT PARTS.
The RS232 interface default output is an eight-bit data word plus one stop
bit and no parity with a baud rate of up to 9600 (see section 3.1 for other
options). It can communicate with either a serial printer or a serial
communication port on a computer.
With the use of a serial-to-parallel converter, the data string transmitted
from the DR/2010 Spectrophotometer prints on any compatible parallel
printer of the type normally used with IBM compatible applications.
If desired, construct a shielded replacement cable using Table 9:
Table 9 Standard 9-pin to 9-pin Computer Cable
Signal Name
RXD
TXD
DTR
GND
DSR
RTS
CTS
Computer 9-pin D Connector, plug
Pin
3
2
no connection
5
no connection
8
7
88
Signal Name
TXD
RXD
GND
CTS
RTS