Siemens PC 677B Operations Instructions Page 186

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Detailed descriptions
17.1 Motherboard
SIMATIC Panel PC 677B
186 Operating Instructions, 05/2007, A5E01035609-01
17.1.4 External ports
Interface Position Connector Description
USB 2.0 external X40
X41
Lower USB channel 0, upper USB channel 2
Lower USB channel 4, upper USB channel 5
PROFIBUS/MPI external 9-pin, standard socket, electrically isolated interface
Ethernet external X40
X41
First RJ45 port
Second RJ45 port
DVI-I external X302 26-pin socket
Compact Flash external X4 50-pin CF socket, types I / II
COM1 external X616 Serial port
USB ports, X40, X41
The Universal Serial Bus interfaces have the following pinout:
USB interface
Pin No. Short description Meaning Input /Output
1 VCC + 5 V (fused) Output
2 – Data Data channel Input / output
3 + Data Data channel Input / output
4 GND Ground
The connectors are of type A.
All ports are designed as high current USB (500 mA), you can only use a maximum of 2
simultaneously as high current, however.
PROFIBUS/MPI interface
PROFIBUS/MPI interface
1)
Pinno. Short description Meaning Input / output
1 Unassigned
2 Unassigned
3 LTG_B Signal line B of MPI module Input/output
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