DTL-DB10-6 View Datasheet(PDF) - Murata Manufacturing

Part Name

Description

Manufacturer

DTL-DB10-6

Interface Board for Serial-Input Electronic Loads

Murata Manufacturing 

InterfaceBoard for Serial-Input Electronic Loads

DTL-IFB-485

Programmed Operation

Although most of this note describes operation with a

dumb terminal, you can obviously issue commands from

a program written in any language of your choice. All

that is important to observe is that the command strings

are correct in syntax and of the right length. For

instance in BASIC:

OPEN “COM1:9600” AS #1:

A$ = “A012_?V”:

PRINT #1, A$:

PAUSE 20:

INPUT #1, X$:

opens COM1 port for I/O

setup command string to read A/D

send command (note PRINT adds a CR)

wait 20 milliseconds

read result into X$

After sending only a carriage return with line feed, the

next command will be skipped and may need to be resent.

Remember that any addressed (unit specific) command

will produce a response.

After the command has been sent, it takes a few tens of

milliseconds for the DTL-IFB-485 to process it and

respond. Don’t try and read back data immediately. Also in

the event that there is no response, you need some form

of timeout so that your program does not hang waiting for

input.

Key points to note are that you must send an ASCII

carriage return after the command string (character 13).

The DTL-IFB-485 will not start parsing the command

until it receives a carriage return or the command string

is greater than 10 characters long (which should not

happen in normal operation).

The input buffer length of is limited to 10 characters.

Commands longer than this may be executed or ignored

(e.g. A123_1234LXXXXXXX will be treated as

A123_1234L, but some of the additional characters may

end up in the leading positions of the input buffer and

mess up the next command, requiring resending of the

command.

Coding Table

Unipolar

Scale

0 to +4.096V

Input Ranges

0 to +8.192V

Co

0 to 40.96V

+FS - 1 LSB +4.095V

+8.190V

+40.86V

7/8 FS

+3.584V

+7.168

+35.84V

3/4 FS

+3.072V

+6.144V

+30.72V

1/2 FS

+2.048V

+4.096V

+20.48V

1/4 FS

+1.024V

+2.048V

+10.24V

1/8 FS

+0.512V

+1.024V

+5.12V

1 LSB

+0.001V

+0.002V

+10.00V

0

+0.000V

+0.000V

+0.000V

ASCII Code Binary Equivalent

FFF

1111 1111 1111

E00

1110 0000 0000

C00

1100 0000 0000

800

1000 0000 0000

400

0100 0000 0000

200

0010 0000 0000

001

0000 0000 0001

000

0100 0000 0000

7

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