J302 SoM_IoT_1V2

Figure 4 display the highlighted 9 pin connector J302 on bottom side of SoM_IoT_1V2 printed circuit board. With further development of Intelligent RJ45 Module, the SoM_iRJ45 supports additionally two CANopen ports. Both ports just offer the transceiver (TX) and receiver (RX) signals per port. For complete CAN connection, additional components are required. Following Figure 4 give an overview about the connection pins of J302. Subsequently all 9 pins will be described.

Figure 4: SoM_IoT_1V2 J302

Pin 10 (P1ACT) offers ethernet port 1 activity indicator signal associated with R-IN32M3-EC Port RP04.

Pin 11 (P1LINK) offers ethernet port 1 link indicator signal and is connected with CATLINK1 signal for EtherCAT confirm indication requirements. This signals are associated with R-IN32M3-EC Port P05 and P07.

Pin 12 (P0ACT) offers ethernet port 0 activity indicator signal associated with R-IN32M3-EC Port RP02.

Pin 13 (P0LINK) offers ethernet port 0 link indicator signal and is connected with CATLINK0 signal for EtherCAT confirm indication requirements. This signals are associated with R-IN32M3-EC Port P04 and P06.

Pin 14 (VCC33) can be optional connected with external DC voltage source. The SoM_iRJ45 is specified for an input voltage range of 3,15V DC to 3,45V DC.

Note: Higher voltage (above 3.6V DC) at power supply pins may cause damage this module!

Pin 15 (GPIO0) is directly connected with R-IN32M3-EC. Port 5 Pin P53

Pin 16 (GPIO1) is directly connected with R-IN32M3-EC. Port 5 Pin P54

Pin 17 (GPIO2) is directly connected with R-IN32M3-EC. Port 5 Pin P55

Pin 18 (GPIO3) is directly connected with R-IN32M3-EC. Port 5 Pin P56

Exemplary indicator signal connection for Link and Activity

The 4 defined indicator signals of J302 pin 10 to 13 are recommended to connect similar to the following Schematic 1. The value of resistance depends on used LED which are integrated in your Ethernet connector.

Schematic 1: Ethernet Activity and Link indicator Schematic