IBM 86626RY Hardware Maintenance Manual - Page 202
RS-485 port, Table 9. USB connector pin-number assignments
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Note If more than one USB device is to be attached, then the device must be connected to a hub. Table 9 shows the pin-number assignments for the USB connectors. Table 9. USB connector pin-number assignments Pin Signal 1 VCC 2 −Data 3 +Data 4 Ground RS-485 port: The system board has an RS-485 port that can be used by the Advanced System Management Processors of several servers mounted in a rack enclosure to communicate with each other in half-duplex mode. Table 10 shows the pin-number assignments for the RS-485 connector. 1 6 Table 10. RS-485 port pin-number assignments Pin Signal 1 +5 V dc 2 +Data (tied to pin 4) 3 −Data (tied to pin 5) 4 +Data (tied to pin 2) 5 −Data (tied to pin 3) 6 Ground 194 Netfinity Server HMM
Note
If more than one USB device is to be attached, then
the device must be connected to a hub.
Table
9 shows the pin-number assignments for the USB
connectors.
RS-485 port:
The system board has an RS-485 port
that can be used by the Advanced System Management
Processors of several servers mounted in a rack enclosure
to communicate with each other in half-duplex mode.
Table
10 shows the pin-number assignments for the
RS-485 connector.
1
6
Table 9. USB connector pin-number assignments
Pin
Signal
1
VCC
2
-
Data
3
+
Data
4
Ground
Table 10. RS-485 port pin-number assignments
Pin
Signal
1
+
5 V dc
2
+
Data (tied to pin 4)
3
-
Data (tied to pin 5)
4
+
Data (tied to pin 2)
5
-
Data (tied to pin 3)
6
Ground
194
Netfinity Server HMM