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Compact FieldPoint Accessories 4 ni.com
Signal Assignments for Serial Cable Adapters
Table 1 lists the pins on all the cFP-20xx controller cable adapters
and the RS-232 and RS-485 signals assigned to them.
I/O Connector Cable Adapters
NI offers three cable adapters for use with the 37-pin I/O
connectors on the Compact FieldPoint backplane.
Caution
Compact FieldPoint I/O connector cable
adapters are for use only with nonhazardous voltages.
1
For hazardous voltage wiring, use cFP-CB-x connector
blocks and follow local electrical standards.
Part numbers 778621-01 and 778621-02 are 37-pin male to 37-pin
female cable adapters in 1 and 2 m lengths, respectively. They are
designed for connecting directly to DIN rail–mounted terminal
blocks, part numbers 778672-01 and 778673-01.
Table 1. Compact FieldPoint Serial Cable Pin Descriptions
DB-9 Pin RS-232 Signal
RJ-50 Pin or
Screw Terminal
RS-485 Signal
1 DCD 10 GND
2 RX 9 CTS
+
(HSI
+
)
3 TX 8 RTS
+
(HSO
+
)
4 DTR 7 RXD
+
5 CND 6 RXD–
6 DSR 5 CTS– (HSI–)
7 RTS 4 RTS– (HSO–)
8 CTS 3 TXD
+
9 RI 2 TXD–
— No Connect 1 No Connect
1
Nonhazardous voltage is voltage below 42.4 V
rms
or 60 VDC.