RTD Embedded Technologies, Inc.
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20
LAN35MH08HR & LAN35ME08HR User’s Manual
3.3.2
P
ORT
1-8,
RJ-45
T
WISTED
P
AIR
E
THERNET
(-RJ
VERSION
)
Port 1
–
Port 8 are standard RJ-45 female connectors and follow the 10/100/1000 Base-T Ethernet pinout. They are designed to be used with
Cat5e UTP (Unshielded Twisted Pair) or similar cables. The pinout of all eight connectors is the same. The figure below shows the pin
numbering when
looking into the connector
:
Figure 7: RJ-45 Pin Numbering
The pin functions are described as follows:
Pin
1000 Function
10/100 Function
1
MDI_A+
Tr
2
MDI_A-
Transmit -
3
MDI_B+
R
4
MDI_C+
Not Used
5
MDI_C-
Not Used
6
MDI_B-
Receive -
7
MDI_D+
Not Used
8
MDI_D-
Not Used
Table 9: RJ-45 Signal Descriptions
3.3.3
CN5
(T
OP
)
&
CN8
(B
OTTOM
)
S
TACK
NET®
C
ONNECTORS
The StackNET® connector is a board-to-board Gigabit Ethernet connection which allows the LAN35Mx08 to be stacked with other RTD
StackNET® products. Multiple LAN35Mx08 boards may be stacked together to increase the overall port count of the system. In addition to
switches, RTD also offers router products which incorporate the StackNET® connector, allowing the user to create a complete
“communications hub” in a single system.
The LAN35MH08HR
“host” version has an upward
StackNET® connector only. It is intended to be placed at the bottom of a StackNET® board
stack. The LAN35ME08HR
“expansion” version has both upward and downward
StackNET® connectors. It is intended to be stacked above
the host board. Multiple LAN35ME08HR boards may be stacked above a LAN35MH08HR. Since the downward StackNET® connector on the
LAN35ME08HR exceeds the PCIe/104 component height specification, it should only be stacked above other RTD StackNET® products.
3.3.4
CN19
USB
S
ERIAL
C
ONSOLE
The USB Serial Console connector is primarily used for initial configuration and troubleshooting of the switch via the Industrial Command Line
Interface (ICLI). CN19
is a USB “device” p
ort, with an Exar XR21B1411IL16 USB UART device. It is intended to be connected to the USB port
of a PC (RTD cpuModule, laptop, or desktop). The USB signals comply with the USB 2.0 specification (Full Speed, 12Mbit/sec).
To provide an uninterrupted console connection while the switch is power-cycled, a USB power input pin is provided. This pin is intended to be
connected to the USB power output signal of the PC
’s USB port
. If this signal is not connected, the switch will operate normally but the console
connection will be lost if the switch is power-cycled and initial boot messages may be missed. Providing USB power via CN19 is
recommended.
CN19 is a 10-pin DIL connector with 2mm pin spacing. The pinout is described in the table below. Pin 1 is indicated by a square solder pad.
Pin 9
Pin 7 Pin 5 Pin 3
Pin 1
Pin 10 Pin 8 Pin 6 Pin 4 Pin 2
Figure 8: CN19 Pin Numbering