Product Overview
The Triconex 3504E serves as a high-density digital input module for Triconex Safety Instrumented Systems. It monitors 64 field contact inputs with commoned DC-coupled architecture for efficient wiring. This module delivers reliable status acquisition for critical safety applications demanding high channel counts.
Key Technical Specifications
Engineers choose this module for its wide voltage range and comprehensive diagnostic features. Its high channel density saves valuable rack space in large-scale safety systems. Below, we detail the core technical parameters.
| Specification | Details |
|---|---|
| Product Type | Triple Modular Redundant (TMR) Digital Input Module |
| Manufacturer | Triconex (Schneider Electric) |
| Model Number | Triconex 3504E |
| Series | Triconex Safety Instrumented Systems (SIS) |
| Input Channels | 64 digital inputs per module, commoned configuration |
| Input Coupling | DC-coupled for accurate signal acquisition |
| Nominal Voltage | Selectable for 24 VDC or 48 VDC operation |
| Operating Range | Accepts 20–72 VDC input signals |
| Maximum Voltage | Withstands up to 72 VDC continuously |
| Typical Hysteresis | 4 VDC (24V setting) / 7 VDC (48V setting) for noise immunity |
| Stuck Test Capability | Performs automatic ON and OFF stuck-at tests for contact monitoring |
| Field Isolation | Provides optical isolation for system protection |
| Module Diagnostics | Continuous online monitoring with fault reporting to logic solver |
| Physical Dimensions | Standard Triconex module size |
Detailed Features and Benefits
High-Density 64-Channel Input Monitoring
The Triconex 3504E packs 64 digital inputs into a single module slot. This high channel density maximizes I/O capacity within your Triconex chassis. Consequently, you can monitor more field devices while conserving valuable rack space for other functions.
Flexible Wide-Range Voltage Operation
You can configure this module for either 24 VDC or 48 VDC nominal input voltages. It reliably operates across the full 20–72 VDC range to accommodate varying field device requirements. Therefore, you maintain flexibility when integrating sensors from different installations.
Superior Noise Immunity with Programmable Hysteresis
The module applies 4 VDC hysteresis for 24V applications and 7 VDC for 48V applications. This hysteresis prevents false triggering from electrical noise on field wiring. As a result, you achieve accurate and stable input readings even in electrically noisy environments.
Comprehensive Stuck Contact Testing
The 3504E automatically performs stuck-at tests for both ON and OFF conditions. It verifies that field contacts can change state when required for safety functions. This diagnostic capability ensures you detect welded contacts or stuck switches before they compromise safety.
TMR Architecture for Unmatched Safety Integrity
This module utilizes Triple Modular Redundant technology for every input channel. It processes each field signal through three independent voting circuits. Therefore, a single component failure cannot cause a spurious trip or prevent a valid safety demand.
DC-Coupled Inputs for Accurate Signal Acquisition
The DC-coupled design ensures faithful reproduction of field contact status changes. It captures fast transitions without the distortion introduced by AC coupling. This feature proves essential for monitoring rapidly changing safety-critical signals.
Details
| Weight | 0.595 kg |
|---|---|
| Dimensions | 18 × 225 × 209.7 mm |



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