B&B Electronics 232D4SS8 Communication & Configuration Switch DIP Switch Setting, Master Port

Table 1. Communication & Configuration Switch

		DIP Switch 1
1	2	3	4		5	6	7	8	Setting
0	0	0		0	X	X	X	X	300 Baud
1	0	0		0	X	X	X	X	600 Baud
0	1	0		0	X	X	X	X	1200 Baud
1	1	0		0	X	X	X	X	2400 Baud
0	0	1		0	X	X	X	X	4800 Baud
1	0	1		0	X	X	X	X	9600 Baud *
0	1	1		0	X	X	X	X	19.2K Baud
1	1	1		0	X	X	X	X	38.4K Baud
X	X	X		X	0	X	X	X	8 Data Bits *
X	X	X		X	1	X	X	X	7 Data Bits
X	X	X		X	X	0	X	X	Smart Switch Mode *
X	X	X		X	X	1	X	X	Smart Switch and
									Port Combiner Mode
X	X	X		X	X	X	0	X	3 Char. Command *
X	X	X		X	X	X	1	X	4 Char. Command
X	X	X		X	X	X	X	0	Port Select Test Off *
X	X	X		X	X	X	X	1	Port Select Test On
		0	= OFF			1 = ON			X = DON'T CARE
					* = FACTORY DEFAULT

Port Configuration

The 232D4SS8 has a Master port and eight selectable ports labeled "A" through "H". Refer to “Rear View”. The Master port should be connected to the RS-232 device that will be selecting the ports. Ports "A - H” connect to the RS-232 or RS-422/485 devices that will communicate with the Master port device.

Master Port

The Master port can be configured by the user as a DCE or a DTE port. In order to determine the proper Master port configuration of the 232D4SS8 it is necessary to have a basic understanding of the terms DCE and DTE. RS-232 was designed, using DB-25 connectors, for connecting a DTE (Data Terminal Equipment) device to a DCE (Data Communication Equipment) device. Each device will have inputs on pins that correspond to outputs on the same pins of the other device. For example, a DTE device transmits data out on pin 2 and a DCE device receives data in on pin 2. IBM PC's are DTE devices, modems are DCE devices. The Master port is shipped configured as a DCE port.

4 Documentation Number 232D4SS84502 Manual

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