B-1
1010ENFM-3B
Appendix
SITE SETUP CONSIDERATIONS FOR SITRANS F 1010/1020N BLIND SYSTEMS
Siemens offers an economical “blind” 1010/1020 NEMA system (without a local keypad and graphic
display screen). This supplement describes the hardware and software requirements for programming
these models. Site setup for a blind unit requires a PC connected to the RS-232 serial port. These models
include a serial interface cable for this purpose. The serial interface cable includes 9-pin and 25-pin
connectors to accommodate both types of IBM-compatible serial ports. A PC communication program
such as Terminal (Windows 3.x) or HyperTerminal (Windows 95/98/NT/2000/XP) serves as the data
entry interface. These programs reproduce the menu screens that would appear on the system’s graphic
screen. In fact, the example screens in this manual are actual HyperTerminal screen captures. Once the
serial interface is established, the site setup procedure for blind and graphic display systems are identi-
cal. You could choose to program a graphic display system using a PC and a communications program.
However, note that for models with a local display screen, the serial interface cable is an option.
NOTE: You can use a DOS-based communications program also. Make sure that your PC is load-
ing the ANSI.SYS driver via your Config.sys file. Set the program’s RS-232 parameters to
match those of the flowmeter (see HyperTerminal example screen on the following
pages).
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).
THE RS-232 INTERFACE CABLE
The physical connection between the flow computer and your PC is accomplished using a serial interface
cable, part number: 1015CPC-N. The schematic below shows the configuration of the cable. The wire
ends for the flow computer termination are tinned for easy insertion into TB1 on the flow computer. Each
wire is labeled to identify the correct terminal pin on TB1. In addition, both connectors have their CTS pin
shorted to the RTS pin (pins 4 - 5 on 25-pin connector and pins 7 - 8 on 9-pin connector). This eliminates
the need for hardware “handshaking.”
APPENDIX B
1015CPC-N SERIAL INTERFACE CABLE
6
GND
4
RX
1
TX
TB1
*Solder side shown
*Solder side shown
2 3 5
7 8
2 3 4 5 7
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