SENSOR CONNECTIONS

The sensor connections are on the left side of the terminal enclosure.

Each sensor has two screened twisted wire pairs, either as one dual pair cable, or two separate pairs

One pair is connected to the TX (transmit) group and the other to the RX (receive) group. The sensors are symmetrical so either of the pairs can be chosen as TX or RX. The two cores in each group are connected to A and B, the polarity is not important. Each screen connection, normally coloured green, is connected to the group’s SCN terminal. Cable screens must not be earthed at any other point.

The un-screened length of the cores should be as short as possible, to prevent crosstalk, but in any case no longer than 30mm.

RELAYS

The relay NC-C-NO labels represent the relay terminals in the de-energised state.

HART CONNECTIONS AND JUMPER SETTINGS

There are two clearly labelled HART Test Points, labelled A and B. These test points are for connection of a HART Hand Held Communicator, to provide a local interface to the MSM400 if required. Above terminal blocks 7-12 there is a plug selector labelled PL1.

The normal position is with the plug shorting out the left hand pins. In this case, the external 20 mA loop must have at least a 250 ohm impedance to enable HART communictions. With the plug in the central position, the MSM400 itself provides this load in the 20 mA loop. The right hand position enables HART communication when there is no external loop connected by connecting a 270 ohm resistor across the current output. (See Appendix D).

NOTE:

The 20 mA output will not function correctly when the link is in this right hand position, so replace it in position 1 or 2 after use!

CURRENT OUTPUT

The current output may be connected in loop-powered mode or internally powered mode. See connections in Fig 10 below.

In Loop-powered mode an external power source is required. A minimum of 2.5v is required across terminals 16 and 17 for correct operation. The external voltage should not be more than 30v.

Note that the current output must not be routed through hazardous areas unless protected by an additional I.S. barrier.

Terminal Number

Figure 10 : Alternative current output configurations

IP258

14

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Emerson IP258 manual Sensor Connections, Relays, Hart Connections and Jumper Settings, Current Output, Terminal Number
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IP258 specifications

The Emerson IP258 is an advanced industrial monitoring device designed to enhance operational efficiency and ensure optimal performance in various industrial applications. It is particularly suited for monitoring, controlling, and managing processes across diverse industries such as oil and gas, pharmaceuticals, food and beverage, and water treatment.

One of the main features of the IP258 is its robust and flexible architecture, enabling seamless integration with a wide range of field devices, sensors, and control systems. This adaptability ensures that the device can be tailored to specific operational needs, thus streamlining processes and enhancing reliability. Its modular design allows for easy upgrades and expansions, making it a cost-effective solution for companies looking to future-proof their investments.

The IP258 boasts advanced communication technologies, including support for various industrial protocols such as Modbus, Ethernet/IP, and Profibus. This versatile communication capability facilitates real-time data sharing and interoperability between different systems, promoting a cohesive operational environment. The device is equipped with multiple input and output options, which further enhances its functionality and connectivity with existing infrastructure.

Another standout characteristic of the Emerson IP258 is its user-friendly interface, which simplifies operation and minimizes training requirements. The intuitive graphical interface allows operators to easily visualize system performance, access historical data, and quickly identify anomalies. This ease of use not only ensures efficiency during normal operations but also aids in rapid troubleshooting and issue resolution.

The device is designed with high reliability and durability in mind, featuring superior environmental resistance to withstand harsh industrial conditions. Its rugged housing and advanced components ensure long-term performance, reducing the likelihood of unexpected downtime and maintenance costs.

In addition, the IP258 incorporates built-in data logging and analytics capabilities, enabling users to gather insights into operational trends and performance metrics. This feature is essential for predictive maintenance and proactive decision-making, ultimately driving productivity and minimizing operational risks.

Security is another priority in the design of the Emerson IP258. The device includes a comprehensive suite of cybersecurity measures to protect sensitive data and prevent unauthorized access, ensuring that operational integrity is maintained at all times.

Overall, the Emerson IP258 stands out as a powerful and versatile tool for industrial monitoring and control, combining advanced features, robust technology, and user-friendly design to meet the demands of modern industrial environments.
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