Triconex  3504E High Density Digital Input Module Tricon3504E (TMR)

Part number: 3504E

Manufacturer:TRICONEX

Product Description:High Density Digital Input Module(TMR)

The Triconex 3504E is a high-density digital input module manufactured by Triconex, a company that produces safety and critical control systems. The module is designed to detect transitions from a normally energized circuit to an off state. It has 64 channels that are DC-coupled and high-density, with a voltage of 24/48 VDC and a range of 20-72 VDC. It is designed to provide maximum cabinet space savings and is commoned, ensuring the highest integrity of data input to the module. It also has a circuit stuck-On or stuck-Off self-test feature, which is an important function .

The Triconex 3504E is a TMR (Triple-Module Redundancy) digital input module. On TMR digital input modules, all critical signal paths are 100% triplicated to guarantee safety and maximum availability. Each channel conditions signals independently and provides isolation between the field and the Tricon controller. The model 3504E high-density module is an exception, as it does not have channel-to-channel isolation. Models 3502E, 3503E, and 3505E include a self-test feature that verifies the ability of the Tricon controller to detect transitions from a normally energized circuit to the off state. Because most safety systems use a de-energize-to-trip setting, the ability to detect the off state is an important feature .

The Triconex 3504E has a maximum voltage of 72 VDC and a typical hysteresis of 4 VDC/7 VDC. To test for stuck-On inputs, a switch within the input circuitry is closed to allow a zero input (Off) to be read by the optical isolation circuitry. The last data reading is frozen in the I/O processor during the test run. Any diagnostic on any channel activates the fault indicator, which in turn activates the chassis alarm signal. The fault indicator points to a channel fault, not a module failure. The module is guaranteed to operate correctly in the presence of a single fault and may continue to operate correctly in the presence of some types of multiple faults.

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