R-1
RS-232 (5-volt) Option
0115981
1/15/98
1. General Description
1. General Description
1. General Description
1. General Description
1. General Description
This option transmits serial RS-232 (5-volt) data on the white/green wire (pin 9) of the R-1. The
serial data transmitted is the same as that shown on the digital display of the R-1. The white/green
wire may be connected to a PC through Electronics International’s 8 Channel Multiplexer Unit (MUX-
8). If the transmitted signal is inverted, it may be connected directly to a PC. The serial data is trans-
mitted in a comma delimited format, suitable for importing into most spreadsheet and data base pro-
grams.
2. Instrument Operation
2. Instrument Operation
2. Instrument Operation
2. Instrument Operation
2. Instrument Operation
The RS-232 (5-volt) option does not affect the operation of the R-1. See the R-1 Operating and
Installation Instructions for R-1 operating information.
3.
3.
3.
3.
3.
T
T
T
T
Transmit Specifications
ransmit Specifications
ransmit Specifications
ransmit Specifications
ransmit Specifications
* Baud Rate:
9600
* Data Bits:
8
* Start Bit:
1 (Logic Low)
* Stop Bit:
1 (Logic High 5-volts)
* Parity:
None
* Transmit Rate: 1/3 sec.
4.
4.
4.
4.
4.
T
T
T
T
Transmit F
ransmit F
ransmit F
ransmit F
ransmit Format
ormat
ormat
ormat
ormat
The R-1 transmits the following record:
RPM,nnn0CrLf
RPM
Instrument identifier.
,
A comma separates data fields.
nnn0
Data as shown on the digital display (0000 to 9990). 10 count resolution.
Reading below 300 read 0000.
Cr
Carriage return (0Dh)
Lf
Line feed (0Ah)
5. Hook-Up
5. Hook-Up
5. Hook-Up
5. Hook-Up
5. Hook-Up
Place the white/green wire (included in the kit) into pin 9 from the back of the R-1 cable harness.
RS-232 (5-volt) serial data is transmitted on this wire.
