B&B Electronics 232D4SS8 Request to Send Output, Clear to Send Input, Data Term Ready Output

Table 4. DTE PORTS A - H

			RS-232
			Signal
			Direction of
Pin #	Signal	Description	DTE Ports A
			through H
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-422/485 option if installed.

The 232D4SS8 has eight ports labeled "A - H". Refer to “Rear View”. Any of these ports can be manufactured to meet either RS- 232 or RS-422/485 electrical characteristics. The 232D4SS8 comes standard with four RS-232 ports and four ports that are RS-232 or RS-485 depending on the pins that you use.

RS-232 Configuration

All eight RS-232 slave ports will be wired as DTE ports. Refer to Table 4 for pin out, signal name, and signal direction information. Also, refer to Figure 5 for a simplified schematic showing the relationship between the Master port and any RS-232 port "A-H". Refer to Appendix B for cable charts.

Documentation Number 232D4SS84502 Manual 9

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