Safety System DI Module 2553 | Triconex Triple-Redundant Design

Triconex 2553 Digital Input Module – Product Description

Product Summary

The Triconex 2553 Digital Input Module offers dependable signal acquisition for mission-critical safety systems operating in demanding industrial environments. It supports high-integrity digital inputs that feed directly into Triconex TMR architectures used for shutdown, protection, and real-time monitoring. Moreover, its fast response and extensive diagnostics help operators ensure that field events are captured accurately, which enhances plant reliability and process safety. The module is widely trusted in energy, chemical, and heavy-industry applications that require consistent performance under extreme conditions.

Technical Specifications

Model: 2553
Product Type: Digital Input Module
System: Triconex TMR Safety System
Country of Origin: USA

Electrical & Input Characteristics:

• Input type: Digital input

• Number of channels: 32 isolated digital inputs

• Nominal voltage: 24 VDC

• Input current: Up to 2 A per channel

• Response time: Less than 1 ms

• Isolation: Channel-to-channel isolation

Diagnostics:

• Continuous self-diagnostics and fault reporting

• Sequence of Events (SOE) with millisecond accuracy

• Supports force-to-value testing

Physical Specifications:

• Dimensions: 177 mm × 100 mm × 30 mm

• Weight: 2.5 lbs (1.1 kg)

• Rack-mount compact design

Environmental Ratings:

• Operating temperature: –40 °C to +70 °C

• Storage temperature: –40 °C to +85 °C

• Humidity: 5–95% non-condensing

Certifications:

• IEC 61508 SIL3

• TÜV approval for SIS use

FAQ

Q1: Which systems support the Triconex 2553 module?
It integrates seamlessly with Triconex TMR safety systems used across SIS applications.

Q2: How many inputs can the module handle?
The module supports 32 isolated digital channels.

Q3: Does it support millisecond-level event recording?
Yes, it offers SOE recording with sub-millisecond precision.

Q4: Can the module be replaced online?
Yes, it is hot-swappable for maintenance without process downtime.

Q5: What safety certifications apply?
It is SIL3 certified and TÜV approved for high-integrity SIS environments.