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2-15
1020NFM-1D
Section 2
2.7
HOW TO USE THE RS-232 INTERFACE
This section describes the hardware, software and procedural requirements for programming System
1020 using a PC connected to its RS-232 serial I/O port. Although you can construct your own interface
cable, it is probably more convenient to purchase a standard DB-9 (Belden Pro Series Direct Cable
#F3B207-10) serial interface cable. This 9-pin serial interface cable can connect two computers that
are equipped with DB-9 male serial ports. You will also need a PC communication program such as
Terminal (Windows 3.x) or HyperTerminal (Windows 95/98/NT/2000/XP) to serve as the data entry
interface. We recommend these programs simply because they are free and universally owned. How-
ever, you can use your own favorite DOS or Windows-based software as long as it supports VT-100
emulation. These programs reproduce the menu screens that appear on our 1010/1020 systems with
graphic display screens (screens shown in this section are actual HyperTerminal screen captures).
The site setup procedure for System 1020 and our graphic display systems (e.g., FUS1010N) are
virtually identical.
NOTE: If you use a DOS-based communications program, make sure that your PC is loading
the ANSI.SYS driver via your Config.Sys start-up file. Set the RS-232 parameters to
match those of the flowmeter (see example of HyperTerminal screen on the next page).
NOTE: Many newer Laptop PC’s are not equipped with serial ports, having USB ports only.
These PC’s will require a USB RS-232 adaptor that can be purchased commercially.
Not all of these adaptors are suitable. Siemens has found the best performance is
achieved with the adaptor from Radio Shack, (Part# 26-183).
2.7.1 THE RS-232 INTERFACE CABLE
The figure below shows the location of serial interface cable connector J1 used to make the physical
connection between the 1020 flow computer and your PC. (The recommended serial cable is Belden
part number: F3B207-10.) Refer to Appendix B for serial interface cable wiring details.
SERIAL CONNECTOR J1 FOR DB-9 SERIAL INTERFACE CABLE
K2
K1
J1
TB1
TB2
J2
X
X
X
HOT
GND
NEU
CAUTION
HIGH VOLTAGE
JP1
A
B
F1
RS-232
Serial Connector
J1
Model 1020 shown with KeyPad
Enclosure Cover removed.
Summary of Contents for SITRANS FUS1020
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Page 223: ...990TNHM 8 OUTLINE DIMENSIONS TRANSDUCERS TRACKS DEDICATED HYBRID MODE 21614 C ...
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Page 226: ...21614 C PFA DFT FLOWTUBE INSTALLATION OUTLINE 992DFTP T 8 ...
Page 227: ...INSTALLATION OUTLINE 992 SERIES EXTENDED FLOWTUBE 21614 C 992DFTN 8 ...
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