The new ASCO 141 Series Advanced Redundant Control System (ARCS) is the only safety system in the industry with individual valve isolation for online maintenance without process interruption.
This redundant solution addresses a variety of emergency shutdown valve applications, such as those found in the chemical, power, oil and gas industries.
Available globally, it includes various redundant solenoid configurations to enhance the reliability of the process and meet specific safety or reliability requirements in automation processes.
The single inlet/single outlet design provides a streamlined installation process compared to traditional bypass systems, while almost eliminating potential failure points.
ASCO 141 Series Advanced Redundant Control System Features
1oo2 / 2oo2 / 2oo3 redundant configuration to meet availability & reliability
- Increases safety reliability (1oo2)
- Increases operation availability (2oo2)
- Increase the safety reliability & operation availability (2oo3)
Supplied as ONE complete module with factory pre-test & as a single part number
- Saves space
- Ready to install
- Simplified ordering
Eliminate pipework and fittings between the solenoid valves
- Minimizes leak paths
- Increased reliability
- Reduces Total Cost of Ownership (TCO)
Facilitate preventive maintenance and online detection of faults
- Visual status indication via pressure indicators / pressure gauges
- Digital input feedback to control room via pressure switches
- Avoids costly shutdown
Allows online maintenance
- Allows emergency shutdown of the process valve in online maintenance mode
- Individual isolation valve option available for both 2oo2 & 2oo3 configuration
- Common by pass valve available for all 1oo2, 2oo2 & 2oo3 configuration
- ASCOTM 327 series 3/2 way direct acting solenoid valves are certified to SIL 3 capable (Exida & TÜV)
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The ASCO 141 series ARCS is designed for use as a component in safety instrumented systems. Utilizing 1oo2, 2oo2 or 2oo3 voting solenoids to enhance the reliability of the circuit, it functions as a redundant pneumatics tripping device to control the pilot air signal to a process valve actuator. The ARCS features either two or four electrically actuated solenoid valves, visual indicators and a manually controlled bypass or isolation valve. The unique control functionality allows for maintenance of the solenoid valves without having to shut down the process valve. In fact, the use of the maintenance bypass or isolation valve is not required for functional testing of the ARCS unit — a downtime-reducing feature not possible with common bypass functions.
With just a single part number, the ASCO 141 series ARCS features several advances that simplify specification, installation and operation. Supplied as a fully integrated, comprehensive solution using a manifold instead of individual valves, ARCS comes pre-tested from the factory and ready to install. The direct valve-to-valve design eliminates pipework and fittings between the solenoid valves and minimizes leak points for increased reliability and a lower total cost of ownership.
A status indicator with feedback helps facilitate preventive maintenance while providing online fault detection. It provides digital input feedback (via pressure switches or Emerson-exclusive GO Switch options) to the control room. And for additional peace of mind, the ASCO™ 327 series 3/2-way direct acting solenoid valves included on the ARCS manifold are certified to SIL 3 capable (exida) standards.
A direct-acting platform with advanced diagnostic capability and online maintenance features, ARCS is suitable for a wide variety of valve piloting applications to meet both safety and operational availability requirements.
ARCS Instruction Manual | ARCS Safety Manual
LEARN MORE ABOUT THE ASCO REDUNDANT CONTROL SYSTEM (RCS)
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