Figure 3-3 Rs-232 Interface Cable Wiring - Siemens SITRANS F Series Quick Start Manual

Commissioning
3.2 Flowmeter connection using RS-232
1. Referring to the schematic below, wire the RS-232 Interface cable.
Note
Many newer Laptop PCs are not equipped with serial ports, having USB ports only.
These PCs will require a USB RS-232 adapter that can be purchased commercially. Not
all of these adapters are suitable.
with the adapter from Radio Shack (part#26-183).
2. Connect the cable between the flowmeter and the PC using either the 9-pin, 25-pin or
3. Refer to the flowmeter manual for details for accessing the Installation Menu.
RS-232 Interface Cable - RS-232 Connectors (use 9-pin or 25-pin)
The figure below is the schematic of the serial interface cable (MLFB P/N 7ME3960-0CS00)
needed to make the physical connection between the flowmeter and your PC. The wire ends
for the flowmeter terminations are stripped for easy insertion into TB2. Note that 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).
① TB1
② 9-PIN SOLDER SIDE
③ 25-PIN SOLDER SIDE
④ 25-Pin Serial Connector
⑤ 9-Pin Serial Connector
⑥ CABLE PIN 1015CPC-N
Figure 3-3 RS-232 Interface Cable Wiring
20
USB-to-RS-232 cable connector, depending upon the port's architecture.
Siemens has found the best performance is achieved
⑦ Red Wire
⑧ White Wire
⑨ Black Wire
⑩ TB2 of FUS1010
⑪ RX To Flowmeter
⑫ TX From Flowmeter
Operating Instructions (Compact), 1/2009, CQO:QSG005 Revision B
SITRANS FUG1010 Quick Start