B&B Electronics 232D4SS8 manual Simplified Functional Diagram Checklist, Serial Data Configuration

Master Port	Switch
	Control	Ports "A-H"
TD		TD Port A
		TD Port B
UART		TD Port C
Microcontroller		TD Port D
		TD Port E
		TD Port F
		TD Port G
Port Combiner		TD Port H
Control Lines		CTS Port A
		CTS Port H

Figure 1. Simplified Functional Diagram

NOTE: This diagram illustrates only the transmit data (TD) signal.

Checklist

The following equipment should be in the shipping carton:

1.Smart Switch

2.Instruction Manual

3.(2) 3 1/2" disks

If any of the items above are damaged or missing contact the shipper immediately.

Serial Data Configuration

In order for the host device, which is connected to the Master Port of the Smart Switch, to select a port, the Smart Switch must be set to match the host's communication format. This is accomplished by setting an eight position DIP switch labeled "SW1" located inside the Smart Switch. Refer to Figure 2. Switch positions 1 through 4 select the baud rate. Switch position 5 selects 7 or 8 data bits. Refer to Table 1. The remaining switch positions will be discussed later. Always power down the Smart Switch before changing switch settings.

Documentation Number 232D4SS84502 Manual 3

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