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

Table 2. DCE MASTER PORT CHART

			Signal
			Direction of
			DCE Master
Pin #	Signal	Description	Port
2	TD	Transmit Data	Input
3	RD	Receive Data	Output
4	RTS	Request to Send	Input
5	CTS	Clear to Send	Output
6*	DSR	Data Set Ready	Output
7	SG	Signal Ground	<------>
8*	CD	Carrier Detect	Output
20	DTR	Data Term. Ready	Input
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 output. Refer to Figure 5.

**RS-422 Master port option.

Important: All jumpers must be in the same position, either DCE or DTE positions. Do not mix positions! Refer to Figure 3 which shows the Master port configured as a DCE port.

CAUTION: Always power down the Smart Switch before removing its cover.

Documentation Number 232D4SS84502 Manual 7

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