S331P Site Master™ Programming Manual : General Information : Remote Operation Setup and Interface : Ethernet Interface Connection and Setup
Ethernet Interface Connection and Setup
The TCP/IP setup requires the following:
IP Address: Every computer/electronic device in a TCP/IP network requires an IP address. An IP address has four numbers (each between 0 and 255) separated by periods. For example: is a valid IP address.
Subnet Mask: The subnet mask distinguishes the portion of the IP address that is the network ID from the portion that is the station ID. The subnet mask, when applied to the IP address given above, would identify the network ID as 128.111 and the station ID as 122.42. All stations in the same local area network should have the same network ID, but different station IDs.
Default Gateway: A TCP/IP network can have a gateway to communicate beyond the LAN that is identified by the network ID. A gateway is a computer or electronic device that is connected to two different networks and can move TCP/IP data from one network to the other. A single LAN that is not connected to other LANs requires a default gateway setting of If you have a gateway, then the default gateway would be set to the appropriate value of your gateway.
Ethernet Address: An Ethernet address (also known as a MAC address) is a unique 48-bit value that identifies a network interface card to the rest of the network. Every network card has a unique Ethernet address permanently stored into its memory.
8‑pin Ethernet RJ45 Connector Pinout Diagram
Wire Color
TX +
Transmit data (> + 3 volts)
TX –
Transmit data (< – 3 volts)
RX +
Receive data (> + 3 volts)
Not used (common mode termination)
Not used (common mode termination)
RX –
Receive data (< – 3 volts)
Not used (common mode termination)
Not used (common mode termination)
You may need to consult your network documentation or network administrator for assistance in configuring your network setup.
The S331P controller IP address is set automatically by using Dynamic Host Configuration Protocol (DHCP). DHCP is an Internet protocol that automates the process of setting IP addresses for devices that use TCP/IP, and is the most common method of configuring a device for network use. After the Ethernet cable is connected to the S331P controller, go to System, Status, Connectivity Info to view the IP address that the instrument has been assigned. If the user application runs on the S331P controller, the application should access the local host (