944-0140 D20MX Substation Gateway ... - GE Digital Energy

CHAPTER 3: CONNECTING TO DEVICES AND NETWORKS
Twisted-pair Ethernet (for 526-3001 only)
NOTE
To connect the D20MX
to network devices
NOTE
The10/100/1000BASE-T variant of the D20MX can connect to one or two networks through
two twisted-pair Ethernet connections. In single-IP mode this causes the two Ethernet
connections to use the same MAC address and IP address. Port 1 is the primary port and
Port 2 is the secondary port. When the system detects a signal on Port 1, Ethernet traffic
takes place on Port 1. When the system detects loss of signal on Port 1, Ethernet traffic
takes place on port 2.
All RJ-45 connectors have the same signal definition. However, the twisted-pair Ethernet
ports are auto MDI/MDIX and can support a straight-through or crossover cable.
External switches must have Spanning Tree Protocol port settings configured to edge for
proper operation.
Plug network cables into the D20MX twisted-pair Ethernet ports.
If the D20MX is deployed in the presence of strong RF energy in the 110 MHz - 125 MHz
band, such as airport ILS localizers or aviation radio transmitters, it is recommended that
shielded twisted-pair Ethernet cables be used.
Table 12: Ethernet RJ-45 connector signal definitions
Position Function Signal Flow Color
1 RX+ IN White w/ Orange
2 RX- IN Orange
3 TX+ OUT White w/ Green
4 P1+ - Blue
5 P1- - White w/ Blue
6 TX- OUT Green
7 P2+ - White w/ Brown
8 P2- - Brown
Shield - -
Table 13: Ethernet crossover cable (RJ-45) pin out
D20MX Switch/Hub
Name Pin Pin Name
TX_D1+ 1 3 RX_D2+
TX_D1- 2 6 RX_D2-
RX_D2+ 3 1 TX_D1+
RX_D2- 4 2 TX_D1-
BI_D3+ 5 7 BI_D4+
BI_D3- 6 8 BI_D4-
BI_D4+ 7 4 BI_D3+
BI_D4- 8 5 BI_D3-
42 GENERAL D20MX HARDWARE USER’S MANUAL