Overview
Manuals
Working principle
Common Industries
Features:
- TMR Digital Input Modules
- 24 VAC/DC digital input module with 32 inputs
- Commoned in Groups of 8, Self-Test, TMR
Each TMR digital input (DI) module has three independent input channels, each processing all input data independently. The microprocessor on each channel scans each input point, compiles the data, and transmits it to the main processor as needed. The main processor then votes on the input data before processing it to ensure data integrity. All critical signal paths employ 100% triple redundancy for safety and maximum availability. Each channel modulates the signal independently and provides optical isolation between the field and Tricon.
All TMR digital input modules perform continuous and complete diagnostics on each channel. A diagnostic failure on any channel will activate the module fault indicator, which in turn will activate the chassis alarm signal. The module fault indicator indicates a channel fault, not a fault in the module itself. Even with a single fault, the module can still operate normally; even with multiple faults of certain types, the module may continue to operate normally.
The 3503EN2 Invensys Triconex Digital Input Modules may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
Invensys Triconex 3503EN2 Digital Input Modules manual(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.
This model can perform a self-test to detect stuck "on" states, meaning the circuit cannot determine whether a point has become "off". Since most safety systems have power-off tripping capabilities, the ability to detect disconnections is an important feature. To test a stuck input, a switch in the input circuit needs to be closed, causing the opto-isolated circuit to read zero input (off). During the test run, the last read data is frozen in the I/O communication processor.
This module is widely used in:
Power plants (conventional and nuclear power plants).
Oil and gas (refineries and offshore platforms).
Petrochemicals and chemical manufacturing.
Steel mills and heavy-duty vehicle manufacturing.
