Siemens PC 870 Operations Instructions download pdf (Page 112)

Detailed descriptions

15.2 Bus board

Panel PC 870 V2, Computer Unit

15-16 Operating Instructions, Edition 03/2004, CD Documentation and Drivers

Pin assignment of the internal USB port connector, X2033

Pin No. Designation Meaning Input /Output

1 VCC 3.3V +3.3V, fused

2 VCC 5V + 5 V, fused

3 USB3 USB3_M

4 USB5 USB5_M

5 USB3 USB3_P

6 USB5 USB5_P

7 GND Chassis ground –

8 GND Chassis ground –

9 GND Chassis ground –

10 GND Chassis ground –

Pin-out of the USB 2.0 port, X2034

Pin No. Designation Meaning Input /Output

1 VCC + 5 V, fused

2 USB5 USB5_M

3 USB5 USB5_P

4 GND Chassis ground

S1 S Shielding

S2 S1 Shielding

Note

For detailed information on the pin assignments of the interfaces, please contact Costumer

Support or the Repair Center.

15.2 Bus board

15.2.1 Layout and principle of operation

The bus board is designed as a link between the motherboard and the expansion modules. It

is mounted with two screws.

The bus board has two PCI expansion slots (1 x short, 1 x long), two long shared ISA/PCI

and one long ISA slot. Expansion boards (Rev. 3.1) and PCI specification (Rev. 2.0 for 5 V

and 3.3 V modules). All PCI slots are master–enabled. The expansion modules are supplied

with power via the bus board to motherboard connection.

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Siemens PC 870 Operations Instructions Page 112