B&B Electronics 3PXCC1b, 3PXCC1A, 3PXCC2b, 3PXCC2a Physical Hook-up and Troubleshooting, Pinouts

Chapter 6: Physical Hook-up and Troubleshooting

This chapter will cover 3PXCC pinout, communication cable data, and troubleshooting information.

Pinouts

RS-232 Pinouts

The 3PXCC Serial Cards are wired as DTE (Data Terminal Equipment) devices. The 3PXCC Serial Cards can be connected directly to DCE (Data Communication Equipment) devices with a straight through cable. If you need to connect two DTE devices, you will need a null modem cable or cross-over cable.

Table 5. RS-232 Pinout Description

Pin	Name	Description	Direction
1	DCD	Data Carrier Detect	input
2	RD	Receive Data	input
3	TD	Transmit Data	output
4	DTR	Data Terminal Ready	output
5	GND	Signal Ground	------
6	DSR	Data Set Ready	input
7	RTS	Request to Send	output
8	CTS	Clear to Send	input
9	RI	Ring Indicator	input

RS-422 Pinouts

RS-422 mode supports transmit and receive data signals. The pinouts of the DB-9 connector are given in Table 6. Figure 5 shows how to connect a typical RS-422/RS-485 full duplex communication link.

Documentation No.3PXCC1x-2x-3903 39

Pin	Name	Description
1	RD(A)	Receive Data A
2	TD(B)	Transmit Data B
3	TD(A)	Transmit Data A
5	GND	Signal Ground
9	RD(B)	Receive Data B

Table 6. RS-422/RS-485 Pinout Description

RS-485 Pinouts

RS-485 mode supports both full and half duplex communications (transmit and receive data signals). The pinouts of the DB-9 connector are given in Table 6 (if full duplex communication is used). Figure 5 shows how to connect a typical RS-422/RS-485 full duplex communication link. Figure 6 shows how to connect a typical RS-485 half duplex communication link.

3PXCCXX Serial Card		RS-422 Four Wire Devic
	TD(A-) Pin 3		RD(-)
	TD(B+) Pin 2		RD(+)
	RD(A-) Pin 1		TD(-)
	RD(B+) Pin 9		TD(+)
	GND Pin 5		GND

Figure 5. RS-422/RS-485 (Four Wire) Pinout Description

40 Documentation No.3PXCC1x-2x-3903

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