IS200TPROH1C Mark VIeS Secure Discrete Output Module


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The following hardware combinations are approved for use in hazardous locations:
• Mark VIe Discrete Output I/O pack IS220PDOAH1A with terminal board IS200TRLYH2E, IS200TRLYH3E, IS200TRLYH1F, or IS200TRLYH2F.
• Mark VIe Discrete Output I/O pack IS220PDOAH1B with terminal board IS200TRLYH2E, IS200TRLYH3E, IS200TRLYH1F, IS200TRLYH2F, IS200SRLYH1A, IS200SRLYH2A, IS400SRLYH1A, IS400SRLYH2A, IS40yWROBH1A, IS40yWROFH1A, IS40yWROGH1A or IS40yWROHH1A.
• Coated Mark VIe Discrete Output I/O pack IS221PDOAH1B with terminal board IS201TRLYH2E, IS201TRLYH3E, IS201TRLYH1F, or IS201TRLYH2F.
• Mark VIeS Safety Discrete Output I/O pack IS220YDOAS1A with terminal board IS200TRLYS1F, IS200TRLYS2F, IS400TRLYS1F, or IS400TRLYS2F.
• Mark VIeS Safety Discrete Output I/O pack ISx2yYDOAS1B (where x = 2 or 4 and y = 0 or 1) with terminal board IS40yTRLYS1B, ISx0yTRLYS1F, ISx0yTRLYS2F, IS40yTRLYS1D, IS40ySRLYS2A, IS40yWROBH1A, IS40yWROFH1A, IS40yWROGH1A, or IS40yWROHH1A.


A power distribution system using the JPDS power distribution board supports up to three independent control power supply buses: R, S, and T. Following are specific instructions for these connections:

• Up to three 24 or 28 V dc, 20 A control power supplies (R, S, T) may be connected to the JPDS board using wire harness type A. The power supplies are connected to the mains supply.

• An optional PPDA module is used with the JPDS to monitor the health of the power distribution system. It is connected directly to I/O connector JA1, and to power supply connector P4 using wire harness type E.

• The JPDS board supplies R, S, and T power from connectors JAR, JAS, and JAT to controllers using wire harness type B or Ethernet switches using wire harness type C. Connectors JCR, JCS, and JCT are not used because these outputs are not current limited.

• The JPDS board may feed up to six JPDH boards using wire harness type D.

• The JPDH board fans out control power for up to eight R, S, and T (each) modules using wire harness type E. The R, S, and T control power buses can be extended to another JPDH from connector J1X using wire harness type D. Connectors JRS, JSS, and JTS are not used because these outputs are not current limited.

• The JPDE board can be used to provide redundantly sourced I/O wetting power via outputs JS1-3 and JFA-C. The I/O wetting power can be further fused and distributed to I/O terminal boards using the JPDD I/O wetting branch power distribution. Refer to the example diagram and cable table.

DCS control system, as a modern integrated control system, has emerged based on computers and combined with various cutting-edge means such as network communication and multimedia. Its communication function can meet various requirements of the process industry for reliability, openness, real-time performance, and maintainability of control systems, effectively improving production quality and efficiency, and has a very broad application prospect. This article provides an in-depth analysis of common faults and solutions in DCS communication systems, and proposes corresponding preventive measures and experience summaries based on their application characteristics. It has important theoretical and practical guidance significance for the healthy and stable operation of DCS systems.

Common communication faults and solutions
01 Node Bus Fault
The material of the node bus is usually coaxial cable, so as long as one cable is disconnected, communication between all devices on the bus will be paralyzed, causing serious phenomena such as data loss, device shutdown, and operation interruption, which may ultimately cause huge losses directly or indirectly. Frequent plugging and unplugging of coaxial cables can lead to poor contact and signal interruption. Excessive contact resistance can also have an impact on communication lines, and a large transmission data load can lead to a decrease in data accuracy.
To address the above issues, dual redundancy settings can be used, but the cable connection should be located behind the module to ensure that the coaxial cable is not adversely affected by mechanical operation. Only unplug and unplug when maintaining the node bus, and multiple unplugs are prohibited unless there are other special circumstances. Ensure that the contact resistance of the circuit is at a normal level and regularly check the resistance of the circuit.

02 fieldbus fault
The material of the fieldbus is twisted pair, and the equipment connected to the fieldbus is the frontline equipment of the production process, which can directly affect the production process. Due to its location in the nuclear power production site and harsh working environment, it is greatly affected by various unfavorable factors, including contact with it during the production process, deformation of the field bus caused by environmental and mechanical equipment. In addition, poor contact of the bus makes it more likely to malfunction and has a greater impact on the DCS communication system.