Network cable connections

A PC can be connected directly to the Ethernet interface of the SPC controller or via a LAN connection. The tables below show the 2 possible connection configurations.

• If the SPC is connected to an existing network via a hub, then connect a straight through cable from the hub to the SPC and another from the hub to the PC.

• If the controller is not connected to a network (that is, a hub or switch is not used), then a crossover cable should be connected between the SPC controller and the PC.

Use the straight through cable for connecting the SPC controller to a PC via a hub.

RJ45 PIN	RJ45 PIN
1 (RX +)	1 (TX +)
2 (RX -)	2 (TX -)
3 (TX+)	3 (RX+)
6 (TX-)	6 (RX-)

Use the crossover cable for connecting the SPC controller directly to a PC.

RJ45 PIN	RJ45 PIN
1 (RX +)	3 (TX+)
2 (RX -)	6 (TX-)
3 (TX+)	1 (RX +)
6 (TX-)	2 (RX -)