Overview
Manuals
Known Behavior & Vulnerabilities
Safety Considerations
Features:
- Sixteen Guarded outputs (in two groups of eight)
- Complete, automatic testing of all output circuits
- Automatic line monitoring detects open and short field wiring circuits
Monitored Guarded output modules provide Guarded control and line monitoring for sixteen field loads. Three types of modules are available for interfacing to outputs powered from 24 VDC, 110 VAC, or 120 VDC field power supplies. These modules are called Guarded because each module's dualredundant design ensures that no single fault within the module will inadvertently apply power to an output.
These modules also monitor the output field wiring for open and short circuit faults. Individual output line status is available to application programs. Each module's triplicated Safetybus interface ensures that no Regent system failure will inadvertently apply power to an output. Extensive fault detection and redundant critical circuits ensure that each module operates in a fail-safe manner.
The T7481A ICS triplex Monitored Guarded Output Module may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
ICS Triplex T7481A Monitored Guarded Output Module maunal(Datasheets), Link
Important Notice: Other accessories, manuals, cables, calibration data, software, etc. are not included with this equipment unless listed in the above stock item description. All prices are shown in USD.
Current Leakage Alarm: Rockwell Automation has issued a technical service notice stating that current leakage may occur if a two-component circuit fails. This issue could lead to unnecessary downstream energy supply and cause field devices that should be shut down to remain at a high level.
Dynamic Commutation: The safety processor performs continuous line switching tests (0 → 1 → 0 or 1 → 0 → 1). If a logic link fails during these tests, the platform will mark that channel as a structural fault.
The Monitored Guarded output modules are TÜV certified to Risk Class 5 for safety critical outputs. The modules are approved for de-energize to trip safety critical outputs in single or dual module configurations.
The modules are also approved for energize to trip safety critical outputs in dual module configuration, but only if the fault name variables are configured and used to automatically alarm and annunciate the detection of load/fuse faults to plant operations personnel.
