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18 Documentation Number 232BSS4-2907m
B&B Electronics Mfg Co Inc – 707 Dayton Rd - PO Box 1040 - Ottawa IL 61350 - Ph 815-433-5100 - Fax 815-433-5104 – www.bb-elec.com
B&B Electronics – Westlink Commercial Park – Oranmore, Galway, Ireland – Ph +353 91-792444 – Fax +353 91-792445 – www.bb-europe.com
Cascading Multiple Switches
If you have more than four devices that are sending data, more
than one 232BSS4 can be cascaded, allowing more ports to be
added. The 232BSS4 buffers data from all ports at once, making it
well suited for devices that will send a fixed amount of data at
sporadic intervals, such as measurement instruments, security
access card readers, barcode scanners, or time clocks. Below is an
explanation of how best to utilize the 232BSS4 to connect these
devices to your PC.
Scales
Measurement
PC
Card Readers
12
6
39
1
2
11
10
5
4
7
8
Time Clocks
Level 2
78.6
78.6
78.6
78.6
78.6
78.6
78.6
78.6
12
6
39
1
2
11
10
5
4
7
8
12
6
39
1
2
11
10
5
4
7
8
12
6
39
1
2
11
10
5
4
7
8
Port A Port B Port C Port D
MASTER PORT
232BSS4
+12 VDC
POWER
B
B
&
elect r onics
MANUFACTURING COMPANY
www.bb-elec.com Ottawa, IL 61350 USA
Level 1
Port A Port B Port C Port D
MASTER PORT
232BSS4
+12 VDC
POWER
B
B
&
elect r oni cs
MANUFACTURING COMPANY
www.bb-elec.com Ottawa, IL 61350 USA
Port A Port B Port C Port D
MASTER PORT
232BSS4
+12 VDC
POWER
B
B
&
elect r onics
MANUFACTURING COMPANY
www. bb-elec.com Ottawa, IL 61350 USA
Port A Port B Port C Port D
MASTER PORT
232BSS4
+12 VDC
POWER
B
B
&
elect r onics
MANUFACTURING COMPANY
www.bb-elec.com Ottawa, IL 61350 USA
Port A Port B Port C Port D
MASTER PORT
232BSS4
+12 VDC
POWER
B
B
&
elect r oni cs
MANUFACTURING COMPANY
www. bb-elec.com Ottawa, IL 61350 USA
Figure 2.3. Expanding the Number of Slave Ports