EATON 9202-ETS-HN3 Industrial Hardware Security Appliance

Product Overview

The 9202-ETS-HN3 industrial security module from Eaton Crouse-Hinds MTL is a dedicated hardware firewall engineered specifically for protecting Modbus TCP communications in automation and control systems. As part of the Tofino™ 9202-ETS security platform, this device enforces deterministic, read-only data flows between control zones without altering existing network architectures.

Unlike software-based security solutions, the 9202-ETS-HN3 operates as a transparent, inline appliance with fixed-function logic, eliminating configuration drift and reducing the cyber-attack surface in safety-critical environments. Its hardened design and hazardous-location approvals make it suitable for continuous operation in demanding industrial sites.

Core Security Functions

The 9202-ETS-HN3 is purpose-built to secure Modbus-based networks while preserving operational integrity.

• Hardware-enforced Modbus TCP read-only filtering
• Deterministic packet inspection with no operating system exposure
• Embedded firewall logic with fixed policy enforcement
• Integrated event logging for security auditing
• NetConnect LSM for controlled device-to-device communication
• No IP addressing or routing changes required

These functions enable secure segmentation aligned with ISA/IEC 62443 and NERC CIP zoning concepts.

Electrical Characteristics

The power subsystem is designed for resilience and uninterrupted protection.

• Dual redundant power inputs
• Nominal input voltage: 24 V AC (Class 2)
• AC operating range: 18–30 V AC
• DC rated input: 12–48 V DC (Class 2)
• DC operating range: 9.6–60 V DC
• Power connection via 6-position screw terminal block
• Internal hold-up circuitry providing over 10 ms bypass during power transitions

Mechanical and Environmental Design

The 9202-ETS-HN3 is engineered for long service life in harsh industrial installations.

• weight: 660 g
• Compact DIN-rail mountable enclosure
• Industrial-grade components rated for extended temperature operation
• Designed for continuous operation in electrically noisy environments

Certifications and Regulatory Compliance

This model meets international industrial control and hazardous-area requirements.

• CE, FCC, C-TICK
• EN 61131 industrial control compliance
• EN 60950 equipment safety
• cUL508
• ISA-12.12-01 compliant
• Approved for Class I, Division 2 hazardous locations

Typical Applications

The 9202-ETS-HN3 is deployed where deterministic data protection is required without disrupting control logic.

• PLC and DCS network isolation
• SCADA data acquisition protection
• Oil and gas production facilities
• Chemical and petrochemical plants
• Power generation and substations
• Water and wastewater treatment systems

Frequently Asked Questions

Q: Does the 9202-ETS-HN3 require software configuration? A: No. The device uses fixed-function hardware enforcement and does not rely on a configurable operating system.

Q: Can it be installed without shutting down the network? A: Yes. The inline design allows installation without re-addressing or redesigning the network.

Q: Is this device protocol-specific? A: Yes. This model is optimized for Modbus TCP read-only traffic control.