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Section 7 communication, 1 overview, 2 hardware interface – YSI 600DW-B Sonde User Manual

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Communications

Section

7

SECTION 7 COMMUNICATION

This section describes the communication protocols that the Sondes use to communicate with the host
system. Section 7.1 gives a brief overview of the communication ability of the Sondes. The remaining
sections describe available hardware and software features.

7.1 OVERVIEW

The

s

ondes communicate via a serial port that can be configured as either a SDI-12, or a 3-wire

RS-232 interface. The normal mode of operation for the sonde is RS-232, with the following
configurations:

Baud rate:

300, 600, 1200, 2400, 4800, 9600

Data Bit:

8

Parity:

None

Handshake: None

For further detail into the sondes RS-232 and SDI-12 implementations, see

S

ections 7.3 and 7.4

respectively.

With these configurations, the Sonde is capable of interfacing to a variety of devices from a
“dumb” terminal to numerous data collection platforms.


7.2 HARDWARE INTERFACE

Connection from the Sonde to the host computer is provided using the YSI 6095B MS-8 to DB-9 female
adapter. This 6095B then connects to the standard DB-9 male connector on the host computer. The Sonde
PC interface cable is wired for direct connection to a DTE device. The following table defines the interface
circuits. The signals and their directions are defined with respect to use of the Sonde with the 6095B
adapter.


Wire
Color

Pin
Description

DB-9

MS-4 MS-8

Yellow RS232

TX 2 ---- C

Orange RS232

RX 3 ---- D

Green Alarm

----

----

E

Grey RTS

----

----

G

Blue CTS

----

----

H

Red +

12V

DC

9

A

A

Black GND

5 C B

Purple SDI-12

----

B F

Bare Shield ----

----

B

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