
PB-SIO4 Introduction
ID 19957, Rev. 0300Page 1 - 4 ® PEP Modular Computers GmbH
Figure 1-1: PB-SIO4 Board Front View (Optoisolated Version)
1.3 Functional Block Diagram
Figure 1-2: Functional Block Diagram of the PB-SIO4
ISOLATION
OPTO-
Transceiver
Transceiver
DUART DUART
I/F
Logic
B3
B1
B6
B5
B2
B4
ST1
ST2
1
2
25
26
1
2
29
30
ST2
ST1
DUART
DUART
I/F LOGIC
OPTOISOLATION*
TRANSCEIVER
* Optoisolation is optional
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