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Ditel Digital Stars 8000RST Technical Manual

  • I have reviewed the product detail for the DITEL Digital Stars Series 8000RST digital output option. This document provides information on how the device transmits display readings and technical features for different RS232 connection types, including data format, link type and wiring schematics. I am ready to answer your questions.
  • What is the transmission rate?
    What is the data format?
    What are the end of transmission characters?
    What is the maximum recommended distance for RS232/20mA?
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DITEL: PRODUCTS: DIGITAL STARS: 8000RST
DESCRIPTION
This output option transmits the present display reading with sign followed by
the abbreviation corresponding to the unit of measure, at a rate of 1200
bauds. The link is a SIMPLEX type and transmission takes place when a RTS
(Request to Send) is sent from the terminal computer (D.T.E.).
The data format consist of 1 START bit, 7 DATA bits (ASCII), 1 PARITY bit
(even) and 1 STOP bit. After the data string has been transmited, both a
carriage return [CHR$(13)] and a XOFF [CHR$(19)] are finally sent.
The maximum recommended distance between the instrument and the D.T.E.
is 15 meters. For longer distances and up to 300 meters, it must be used the
RS232/20mA output which delivers the same information in a 0-20mA current
loop instead of by voltage levels. In such a case, a RS232/20mA to RS232C
converter is needed when interfacing with a RS232C input.
For the RS232/20mA version, the instrument provides the necessary voltage
(+10V) to generate the 0-20mA current or else to feed the converter as
shown in the figures at right.
TECHNICAL FEATURES
Maximum recommended distances :
RS 232 C ...................................... 15 meters
RS 232 / 20mA ................................. 300 meters
Type of link ....................................... SIMPLEX
Transmission rate .................................. 1200 baud
Transmission format ................................ 1 start bit, 7 data bits
(ASCII), 1 parity bit (even) and
1 stop bit
End of transmission characters ..................... [CHR$(13)] and XOFF
[CHR$(19)]
Connectors ......................................... 1x13-pin AMP-EDGE
25-pin CANNON (through adapter)
WIRING SCHEMATICS
RS 232 C - REQUEST BY RTS
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Data transmission is initiated by sending a high logic level from the D.T.E to
pin A9 (RTS).
RS 232 C - REQUEST BY PUSHBUTTON
Data transmission starts by pressing the [P] pushbutton which generates a
RTS at pin A9.
RS 232 / 20mA - REQUEST BY RTS
Data transmission starts by sending a RTS from the D.T.E. to the converter
which generates a 20mA current flow between pins A4 and A5 (RTS).
RS 232 / 20mA - REQUEST BY PUSHBUTTON
Data transmission starts by pressing the [P] pushbutton which, by grounding
pin A5 causes the current flow through pins A4 and A5.
Warranty:
Press the icon to see it.
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