Introduction - GE DigitalFlow DF868 Programming Manual

Introduction

Wiring the RS232
Interface
Serial Communications
The Model DF868 flowmeter is equipped with a standard RS232
serial interface. By using this interface, any log files stored in the
DF868's memory may be easily uploaded to a personal computer. In
order to accomplish this, the following steps must be completed:
Note: See EIA-RS Serial Communications (916-054) for a more
detailed discussion.
•
Connect the DF868 to the personal computer
•
Check the DF868 baud rate setting
•
Set up the personal computer's terminal software
•
Transfer the log files to the personal computer.
This section also contains instructions for setting up an RS485 serial
interface.
The first step is to connect the built-in RS232 port in the DF868 to
one of the serial ports (COM1 or COM2) on the personal computer.
Table 6-1 below lists the standard cables available from the factory
for this purpose.
Table 6-1: GE Serial Cables
Part Number
704-659
704-660
704-661
704-662
Each of the cables listed in Table 6-1 above is available in several
standard lengths. However, a user-supplied cable may be used, if
preferred. In either case, wire the DF868 end of the serial cable in
accordance with the pin designations listed in Table 1 in the brochure,
EIA-RS Serial Communications (916-054).
Note: For serial communications between a single DF868 and a
single personal computer, no connections are required to pins
4 and 5 of the DF868's serial connector. However, these pins
should be jumpered together to ensure proper operation.
PC Connector DF868 Connector
DB25 Male
DB9 Male
DB25 Female
DB9 Female
March 2008
Flying Leads (5)
Flying Leads (5)
Flying Leads (5)
Flying Leads (5)
6-1