ABB PFEA112-IP20 3BSE030369R0020 tension control unit

Description

The metal bottom of PFEA111-20 and PFEA112-20 connects to the metallic DIN-rail which serves as the Tension Electronics earth connector. This is to ensure a good earth connection both for internal logic and for the EMI immunity and RF emission of the electronics. The DIN-rail must have a good connection to the PE (Protective Earth) of the cabinet. To achieve the best possible corrosion resistance, DIN-rails should be chromium plated, for instance, yellow chromium treated. Use star washers with each screw used to fasten the DIN-rail to the mounting plate. To fasten the DIN-rail onto the mounting plate, the minimum screw diameter is 5 mm and the maximum distance between screws is 100 mm.

The maintenance of DCS can be divided into daily maintenance, preventive maintenance, and fault maintenance.
Daily maintenance and preventive maintenance are maintenance carried out when the system has not malfunctioned. Fault maintenance occurs after a fault occurs, often resulting in partial functional failure of the system and having a negative impact on production; On the contrary, preventive maintenance refers to the planned and regular maintenance of the system during normal operation, in order to timely grasp the operating status of the system, eliminate potential system faults, and ensure long-term stable and reliable operation of the system, forming the concept of regular maintenance. Practice has proven that regular maintenance can effectively prevent the occurrence of DCS sudden failures, forming considerable indirect economic benefits.

1. Daily maintenance of DCS system
The daily maintenance of the system is the foundation for the stable and efficient operation of the DCS system, and the main maintenance work includes the following points:
1) Improve the DCS system management system.
2) Ensure the stable operation of the air conditioning equipment, ensure that the room temperature change is less than ± 5 ℃/h, and avoid condensation on the system equipment due to rapid changes in temperature and humidity.
3) Try to avoid interference from electromagnetic fields on the system, avoid moving operating stations, displays, etc. during operation, and avoid pulling or damaging equipment connection cables and communication cables.
4) Pay attention to dust prevention, properly isolate the site from the control room, and regularly clean and maintain cleanliness to prevent adverse effects of dust on component operation and heat dissipation;
5) It is strictly prohibited to use non genuine software and install software unrelated to the system.
6) Make a backup of the control subdirectory files, and record system data such as PID parameters of each control circuit and the positive and negative effects of the regulator.
7) Check if the control host, monitor, mouse, keyboard, and other hardware are intact, and if real-time monitoring is working properly.
8) Check the fault diagnosis screen for any fault prompts.
9) After the system is powered on, the communication connectors should not collide with conductive bodies such as cabinets, and redundant communication lines and connectors should not collide together to avoid burning the communication network card.

2. Preventive maintenance
Proactive maintenance is carried out in a planned manner to ensure stable and reliable operation of the system and components, a good operating environment, and timely detection and replacement of components to eliminate hidden dangers. Preventive maintenance should be carried out once a year through major repairs to grasp the operating status of the system and eliminate potential faults. During the major overhaul, the DCS system should be thoroughly maintained, including:
1) System redundancy testing: Conduct redundancy testing on redundant power supplies, servers, controllers, and communication networks. Power outage maintenance for operation and control stations. Including dust cleaning of components such as the computer interior, control station cage, and power box.
2) System power supply line maintenance. And conduct power supply capacity testing and discharge operation on UPS.
3) Maintenance of grounding system. Including terminal inspection and ground resistance test.
4) On site equipment maintenance. The specific method can refer to the relevant equipment manual. The person in charge of system maintenance after major repairs should confirm that the conditions are met before powering on, and strictly follow the powering on steps.
3. Fault maintenance

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LC1D258
LC1-D245F7C
LC1D18M7C
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LC1-D09M7C
LC1D09M7C
LC1-D0901
LC1-D0901
LC1-D0610
LC1-D0610
LC100S/SP7
LC1000-S/SP7
LC1000-S/SP7
LC1000S/SP7
LC1000S/SP6
LB 440-M
LB 440-M
LB 440-M
LASC-100W8 S72598-7-2 4S014-13
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LASC-100W8
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LAN-ETH2
LAD-T2
LADN31C
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LAD-N22C
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LA-DN22
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