Communication Ports
4.1 Copper Ethernet Ports
the chassis ground on the device and can accept CAT-5 shielded twisted-pair (STP)
cables.
WARNING
Electric shock hazard – risk of serious personal injury and/or equipment
interference
If shielded cables are used, make sure the shielded cables do not form a ground loop
via the shield wire and the RJ45 receptacles at either end. Ground loops can cause
excessive noise and interference, but more importantly, create a potential shock
hazard that can result in serious injury.
Each port features LEDs that indicate the state of the port.
1
2
1
Speed LED
2
Link/Activity LED
Figure 4.2
RJ45 and FastConnect RJ45
Port LEDs
LED
State
Description
Yellow
The port is
operating at
1000 Mbps
Speed
Off
The port is
operating at
10 or 100
Mbps
Yellow (Solid) Link
established
Yellow
(Blinking)
Link activity
Link/Activity
Off
No link
detected
The following is the pin-out for the RJ45 male connectors:
1
8
Figure 4.3
RJ45 Ethernet Port Pin
Configuration
Name
Pin
10/100Base-
TX
1000Base-
TX
Description
1
RX+
BI_DB+
Receive
Data+ or Bi-
Directional
2
RX-
BI_DB-
Receive
Data- or Bi-
Directional
3
TX+
BI_DA+
Transmit
Data+ or Bi-
Directional
4
BI_DC+
Bi-
Directional
5
BI_DC-
Bi-
Directional
6
TX-
BI_DA-
Transmit
Data- or Bi-
Directional
7
BI_DD+
Bi-
Directional
22
RUGGEDCOM RS940GF
Installation Manual, 01/2021, C79000-G8976-1356-04
