5
Pin Assignments
The CP-118U board has a female DB62 connector on the board, with various connection options available for connecting from the board to your serial devices. In this chapter, we give pin assignments for the board side connector, as well as pin assignments for device side connectors for the different connection options.
The CP-118U board supports RS-232, RS-422, 4-wire RS-485, and 2-wire RS-485. Note that the RS-422 standard uses a balanced voltage digital interface to allow 9600 bps communication over cables of up to 4000 feet in length. Ten receivers can be connected to one driver for broadcasting systems. The RS-485 standard is an enhanced version of the RS-422 balanced line standard. It allows multiple drivers and receivers to work on a multidrop network. A maximum of 32 drivers and 32 receivers can be set up on a multidrop network. The CP-118U board supports both 2-wire half-duplex and 4-wire full-duplex RS-485 communications. In 2-wire RS-485, Data+/- pins are used for both data transmitting and receiving.
The following topics are covered in this chapter:
!Board Side Pin Assignments—Female DB62
"RS-232
"RS-422 and 4-wire RS-485
"2-wire RS-485
!Device Side Pin Assignments
"Male DB9 (Opt8-D/Opt8-M9)
"Male DB25 (Opt8B/C)
"Female DB25 (Opt8A/S)
"RJ45 (Opt8-RJ45)
