Com 2 (Cfp-2110 And Cfp-2120 Only); Com 3 (Cfp-2120 Only); Com 4 (Cfp-2120 Only) - National Instruments Compact FieldPoint cFP-21 Series User Manual

Chapter 3 Feature Descriptions

COM 2 (cFP-2110 and cFP-2120 Only)

COM 3 (cFP-2120 Only)

COM 4 (cFP-2120 Only)

cFP-21xx and cFP-BP-x User Manual
Table 3-2. DB-9 Pin Descriptions (Continued)
DB-9 Pin
6
7
8
9
COM 2 is an RS-232 DTE serial port with a 10-position modular jack. The
Serial Port VIs access COM 2 as port 1. Refer to Figure 3-3 and Table 3-3
for pin locations and signal descriptions.
COM 3 is an RS-232 DTE serial port with a 10-position modular jack. The
Serial Port VIs access COM 3 as port 2. Refer to Figure 3-3 and Table 3-3
for pin locations and signal descriptions.
COM 4 is an RS-485 serial port with a 10-position modular jack. The Serial
Port VIs access COM 4 as port 3. COM 4 has 100 V
isolation. Use an external RS-485 isolator if your application requires more
isolation. Refer to Figure 3-3 and Table 3-3 for pin locations and signal
descriptions.
Pin 1
Figure 3-3. 10-Position Modular Jack Pin Locations
3-8
RS-232 Signal
DSR
RTS
CTS
RI
of operational
rms
Pin 10
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