91
Section 8 Communication setup
Communication setup details connections and programming features of the:
8.1 RS232 cable
8.1.1 RS232 connection
The RS232 connector is a serial input/output port for communicating with a sampler from
an external device such as a Data Transfer Unit (DTU-II) or direct serial connection to a
personal computer running InSight
®
Software.
This port can be configured to communicate at 1200, 2400, 4800, 9600, or 19,200 baud.
Cable required
RS232 Sampler/Flow Meter to PC Cable Assembly (Cat. No. 1727), 10’ long, 6-pin
connector on one end, 9-pin D connector on the other end (9-pin to 25-pin D type adapter
included).
8.1.2 RS232 programming
Note: Some early generation IBM compatibles may have a serial port that is not capable of
communicating reliably at 19,200 baud. If errors develop at high baud rates, try lowering the baud
rate one step at a time (on both the sampler and Streamlogg II™, InSight
®
, or Vision
®
software) until
error free communications is achieved.
1. From the Main Menu, select OPTIONS, ADVANCED OPTIONS, COMMUNICATIONS
SETUP, RS232 SETUP
.
2. Select a baud rate for data communications by pressing
CHANGE CHOICE to cycle
through the possible choices; 1200, 2400, 4800, 9600 or 19,200 baud. The higher the
baud rate setting, the faster data will transfer. Set the baud rate to the highest setting
allowed by the computer. The baud rate must correspond to the baud rate selected in
the software. Press
ACCEPT.
Note: Long runs of RS232 cable, especially if they are run near large motors or fluorescent lights,
can cause communication errors and may require a slower baud rate.
• RS232 Serial Port (section 8.1 on page 91)
• Optional Modem (section 8.2 on page 92)
• 4–20 mA Interface (section 8.3 on page 96)
• Alarm Relays (section 8.4 on page 98)
• Analog Inputs (section 8.5 on page 102)
Table 13 RS232 connection
Pin Signal Description Wire Color
A not used White
B ground Blue
CDSR Yellow
D RCD Black
EDTR Red
F TXD Green
Goodnal STP ST041 Pre Treatment (Sigma 900 MAX All Weather Refrigerated Sampler) Vendor Manual
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