B&B Electronics RS-232/422/485 Serial Card CE 3PXCC4A - Manual (Page 43)

Manual Document# 3PXCC4A3001 41
B&B Electronics Mfg Co – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104
B&B Electronics Ltd – Westlink Comm. Pk – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445
Figure 5. RS-422/RS-485 (Four Wire) Pinout Description
Figure 6. RS-485 (Two Wire) Pinout Description
Communication Cable Data
The 3PXCC4A Serial Card communicates using RS-232,
RS-422, and RS-485 communications. The communication cable
specifications are 24AWG (wire gauge) and 30pF/ft. (capacitance
rating). Twisted pairs are ideal for the RS-422/RS-485 Cable in order
to suppress noise on the data line. B&B Electronics can provide this
communication cable for RS-232 or RS-422/RS-485 Applications.
The Model ETC8195 is a cable style that can be used for RS-232
Applications, and Model ETC8506 can be used for RS-422/RS-485
Applications.
TD(B+) Pin 1
TD(A-) Pin 2
RD(B+) Pin 3
RD(A-) Pin 4
GND Pin 8
TD(+)
TD(-)
RD(+)
RD(-)
GND
3PXCC4A Serial Card RS-422 Four Wire Device
TD(A-) Pin 2
TD(B+) Pin 1
RD(A-) Pin 4
RD(B+) Pin 3
GND Pin 8
DATA (-)
DATA (+)
GND
3PXCC4A Serial Card RS-485 Two Wire Device