Asco ARCS 141 Series Safety Manual
  1. Manuals
  2. Brands
  3. Asco Manuals
  4. Control Unit
  5. ARCS 141 Series
  6. Safety manual

Asco ARCS 141 Series Safety Manual

Advanced redundant control system direct acting platform
Hide thumbs
Table of Contents

Advertisement

Quick Links

Download this manual
Advanced Redundant Control
System (ARCS)
Direct Acting Platform
- 141 Series
Safety Manual for Safety Integrated system
IM-IND-536661-Rev AA
ASCO Valves
®
All Rights Reserved.
E290115 - 12/2018
No. 57, Kundrathur Main Rd., Gerugambakkam, Chennai -6000128, India
www.asco.com
Page 1 of 24

Advertisement

Table of Contents
loading
Need help?

Need help?

Do you have a question about the ARCS 141 Series and is the answer not in the manual?

Questions and answers

Subscribe to Our Youtube Channel

Related Manuals for Asco ARCS 141 Series

Summary of Contents for Asco ARCS 141 Series

  • Page 1 Advanced Redundant Control System (ARCS) Direct Acting Platform - 141 Series Safety Manual for Safety Integrated system IM-IND-536661-Rev AA ASCO Valves ® All Rights Reserved. E290115 - 12/2018 No. 57, Kundrathur Main Rd., Gerugambakkam, Chennai -6000128, India www.asco.com Page 1 of 24...

  • Page 2: Table Of Contents

    TANDARDS ARCS D ..................4 IRECT CTING ESCRIPTION .................... 4 EDUNDANT ONFIGURATIONS ..................... 4 EDUNDANT UNCTIONS ASCO ARCS ......... 5 ESIGNING A AFETY NSTRUMENTED UNCTION USING AN ......................5 AFETY UNCTION ...................... 5 NVIRONMENTAL LIMITS ......................5 PPLICATION LIMITS ......................5...

  • Page 3: Introduction

    This Safety Manual provides information necessary to design, install, verify and maintain a Safety Instrumented Function (SIF) utilizing an ASCO Advanced Redundant Control System, ARCS (141 series). This manual provides necessary requirements for meeting the IEC 61508 or IEC 61511 functional safety standards.

  • Page 4: Product Support

    IEC 61511 Mod. Functional Safety – Safety Instrumented Systems for the Process Industry Sector 2 ARCS Direct Acting Description The ASCO ARCS (141 series) is designed for emergency shut down valves (ON/OFF vales) with various redundant configurations (1oo2, 2oo2 & 2oo3) to meet both safety & availability.

  • Page 5: Designing A Safetyi

    3.3 Application limits The application limits of an ASCO ARCS (141 series) are specified in the user manual. I&M Number 536985 It is especially important that the designer checks for material compatibility considering on-site chemical contaminants and air supply conditions.

  • Page 6: Random Integrity

    Personnel performing maintenance and testing on the ARCS shall be competent to do so. • The useful life of the ARCS is discussed in the Failure Modes, Effects and Diagnostic Analysis Report for the ARCS. IM-IND-536661-Rev AA Page 6 of 24 No. 57, Kundrathur Main Rd., Gerugambakkam, Chennai -6000128, India www.asco.com...

  • Page 7: Installation Andc

    4 Installation and Commissioning 4.1 Installation • The ASCO Solenoid valve must be installed per standard installation practices outlined in the Installation Manual. • The environment must be checked to verify that environmental conditions do not exceed the ratings. •...

  • Page 8: Operation Andm

    V1 & V2 are solenoid operated valves. Both valves are energized then only outlet will gets air supply. B1 is manual operated bypass valve with LOTO protection. A, B and C are visual indicators, IM-IND-536661-Rev AA Page 8 of 24 No. 57, Kundrathur Main Rd., Gerugambakkam, Chennai -6000128, India www.asco.com...
  • Page 9 Illegal state Energized Energized Bypass Green Air Supply Illegal state Energized Bypass Green Air Supply Energized Illegal state Energized Bypass Green Air Supply Energized IM-IND-536661-Rev AA Page 9 of 24 No. 57, Kundrathur Main Rd., Gerugambakkam, Chennai -6000128, India www.asco.com...
  • Page 10 If the logic solver responds to a safety demand, it de-energizes SOV1 and SOV2 and causes the inlet air supply to be blocked off and venting the block valve actuator. IM-IND-536661-Rev AA Page 10 of 24 No. 57, Kundrathur Main Rd., Gerugambakkam, Chennai -6000128, India www.asco.com...
  • Page 11 If the logic solver responds to a safety demand, it de-energizes SOV1 and SOV2 and causes the inlet air supply to be blocked off and venting the block valve actuator. IM-IND-536661-Rev AA Page 11 of 24 No. 57, Kundrathur Main Rd., Gerugambakkam, Chennai -6000128, India www.asco.com...
  • Page 12 To put in normal mode, do the above-mentioned process as reverse. Figure 5 The truth table for all possible device states is shown in Table 5 IM-IND-536661-Rev AA Page 12 of 24 No. 57, Kundrathur Main Rd., Gerugambakkam, Chennai -6000128, India www.asco.com...
  • Page 13 Can do maintenance of SOV, Indicator and pressure switch without disturbing outlet air supply. To put in normal mode, do the above-mentioned process as reverse. IM-IND-536661-Rev AA Page 13 of 24 No. 57, Kundrathur Main Rd., Gerugambakkam, Chennai -6000128, India www.asco.com...
  • Page 14 This configuration is mostly used in safety and availability applications. V1, V2, V3 & V4 are solenoid operated valves. Online maintenance not applicable in this configuration. IM-IND-536661-Rev AA Page 14 of 24 No. 57, Kundrathur Main Rd., Gerugambakkam, Chennai -6000128, India www.asco.com...
  • Page 15 Figure 7 The truth table for all possible device states is shown in Table 7 IM-IND-536661-Rev AA Page 15 of 24 No. 57, Kundrathur Main Rd., Gerugambakkam, Chennai -6000128, India www.asco.com...
  • Page 16 Pressure switches will give signal of each valve zone which is open or close. Online maintenance not applicable in this configuration. IM-IND-536661-Rev AA Page 16 of 24 No. 57, Kundrathur Main Rd., Gerugambakkam, Chennai -6000128, India www.asco.com...
  • Page 17 Figure 8 The truth table for all possible device states is shown in Table 8. IM-IND-536661-Rev AA Page 17 of 24 No. 57, Kundrathur Main Rd., Gerugambakkam, Chennai -6000128, India www.asco.com...
  • Page 18 Can do maintenance of SOV, Indicator and pressure switch without disturbing outlet air supply. To put in normal mode, do the above-mentioned process as reverse. IM-IND-536661-Rev AA Page 18 of 24 No. 57, Kundrathur Main Rd., Gerugambakkam, Chennai -6000128, India www.asco.com...
  • Page 19 Figure 9 The truth table for all possible device states is shown in Table 9. IM-IND-536661-Rev AA Page 19 of 24 No. 57, Kundrathur Main Rd., Gerugambakkam, Chennai -6000128, India www.asco.com...
  • Page 20 B1 is manual operated bypass valve with LOTO protection. A, B, C, D and E are visual indicators, A, B, C & D will show green when air is available and will show red when air is not available at particular valve zone. IM-IND-536661-Rev AA Page 20 of 24 No. 57, Kundrathur Main Rd., Gerugambakkam, Chennai -6000128, India www.asco.com...
  • Page 21 To put in normal mode, do the above-mentioned process as reverse. Figure 10 The truth table for all possible device states is shown in Table 10. IM-IND-536661-Rev AA Page 21 of 24 No. 57, Kundrathur Main Rd., Gerugambakkam, Chennai -6000128, India www.asco.com...

  • Page 22: Operator Interface

    • Field modifications shall not be made to the internal wiring or pneumatic connections of the ARCS. IM-IND-536661-Rev AA Page 22 of 24 No. 57, Kundrathur Main Rd., Gerugambakkam, Chennai -6000128, India www.asco.com...

  • Page 23: Adt - Optional

    5.4 Repair and replacement Repair procedures in I&M Number 536985 must be followed. 5.5 ASCO Notification Any failures that are detected and that compromise functional safety should be reported to ASCO Please contact ASCO Technical Support. 6 Status of the document 6.1 Releases...

  • Page 24: Appendixa - Sis Checklist

    Maintenance Tubing blockage / partial blockage tested Enclosure vent inspected Electrical connection inspected Bypass function and pressure sensors tested Safety loop function tested IM-IND-536661-Rev AA Page 24 of 24 No. 57, Kundrathur Main Rd., Gerugambakkam, Chennai -6000128, India www.asco.com...

Table of Contents