IBM 4840-563 System Reference - Page 50
MSR connector, USB port connector (x 6), Serial Data Out TTL, Ground
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MSR connector Pin Signal 1 +5V 2 Serial Data Out (TTL) 3 Serial Data In (TTL) 4 Ground 5 KBD Enable (low enables kybd data to system) 6 Keyboard data 7 Keyboard clock 8 Ground USB port connector (x 6) Pin Connector 1 5V VBus 2 -Data 3 +Data 4 Ground SurePOS 500 Model XX3 Technical Reference, v 1.3 81 Page 50 of
![](/manual_guide/products/ibm-4840563-reference-7fee297/50.png)
MSR connector
Pin
Signal
1
+5V
2
Serial Data Out (TTL)
3
Serial Data In (TTL)
4
Ground
5
KBD Enable (low enables kybd data to system)
6
Keyboard data
7
Keyboard clock
8
Ground
USB port connector (x 6)
Pin
Connector
1
5V VBus
2
-Data
3
+Data
4
Ground
SurePOS 500 Model XX3 Technical Reference, v 1.3
Page 50 of
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