
3-16
IM DR232-01E
Connecting the RS-232-C cable
For details on connecting the RS-232-C connector of the RS-232-C communication interface
module to a personal computer, see IM DR231-11E, “DR231/DR232/DR241/DR242
Communication Interface User’s Manual.”
CAUTION
When (dis)connecting the RS-232-C cable, turn OFF the power of both
the personal computer and the instrument. If the power is not turned
OFF, malfunctions may occur and the internal circuitry may be
damaged.
Note
To reduce noise, use ferrite cores (e.g., ZCAT 3035-1330 from TDK) for the interface cable as shown
below. Two ferrite cores should be installed near both ends of the interface cable. If the noise is
particularly bad, use several ferrite cores in series. Use a shielded cable for the interface cable and make a
one-point grounding at the ground terminal of this instrument together with the functional-ground terminal
of the personal computer.
Personal
computer
Ferrite core
Function
grounding
terminal
RS-422-A/RS-485
1234
SW1
Data length
Baud rate
ON
OFF
1234
SW2
four-wire/two-wire
Stop bit
Parity
ON
OFF
1234
SW3
Address (upper)
Minimum response time
ON
OFF
1234
SW4
Address (lower)
ON
OFF
Baud rate (No.1 to 3 of SW1)
Baud rate No.1 No.2 No.3
300 OFF OFF ON
600 OFF ON OFF
1200 OFF ON ON
2400 ON OFF OFF
4800 ON OFF ON
9600 ON ON OFF ←Default Setting
19200 ON ON ON
38400 OFF OFF OFF
Data length (No.4 of SW1)
Data length No.4
7 OFF
8ON←Default Setting
3.5 Connecting the Interface Cables
Comentários a estes Manuais