B&B Electronics 232D4SS8 manual DTE Master Port Chart Signal Direction Pin # Description

Table 3. DTE MASTER PORT CHART

			Signal
			Direction of
			DTE Master
Pin #	Signal	Description	Port
2	TD	Transmit Data	Output
3	RD	Receive Data	Input
4	RTS	Request to Send	Output
5	CTS	Clear to Send	Input
6*	DSR	Data Set Ready	Input
7	SG	Signal Ground	<------>
8*	CD	Carrier Detect	Input
20	DTR	Data Term. Ready	Output
14**	TD (B)	Transmit +	Output
15**	TD (A)	Transmit -	Output
16**	RD (B)	Receive +	Input
17**	RD (A)	Receive -	Input

*Pins 6 & 8 are tied together inside the 232D4SS8 and share the same input. Refer to Figure 5.

**RS-422 master port option only.

8 Documentation Number 232D4SS84502 Manual

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