BL4S200 User’s Manual
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3.3.4 Ethernet Port
Figure 14 shows the pinout for the Ethernet port (J2 on the BL4S200 modules that support
Ethernet networking). Note that there are two standards for numbering the pins on this con-
nector—the convention used here, and numbering in reverse to that shown. Regardless of
the numbering convention followed, the pin positions relative to the spring tab position
(located at the bottom of the RJ-45 jack in Figure 14) are always absolute, and the RJ-45
connector will work properly with off-the-shelf Ethernet cables.
Figure 14. RJ-45 Ethernet Port Pinout
Three LEDs are placed next to the RJ-45 Ethernet jack on the BL4S200 model, one to
indicate Ethernet link/activity (
LINK/ACT
), one to indicate when the BL4S200 is con-
nected to a functioning 100Base-T network (
SPEED
), and one (
FDX/COL
) to indicate that
the current connection is in full-duplex mode (steady on) or that a half-duplex connection
is experiencing collisions (blinks).
Two LEDs are placed next to the RJ-45 Ethernet jack on the BL4S210 model, one to indi-
cate an Ethernet link (
LNK
) and one to indicate Ethernet activity (
ACT
).
The RJ-45 connector is shielded to minimize EMI effects to/from the Ethernet signals.
ETHERNET
RJ-45 Plug
1. E_Tx+
2. E_Tx
3. E_Rx+
6. E_Rx
1
8
RJ-45 Jack
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