Product Overview

The Honeywell 8937-HN2 is a high-bandwidth fiber optic extension module engineered to facilitate long-distance data communication between Series 8 controllers and remote CNI2 I/O racks. Designed for the Honeywell Experion PKS ecosystem, this module overcomes the distance limitations of traditional copper cabling by converting electrical signals into light pulses for transmission over single-mode fiber. It provides a robust, interference-free data link capable of maintaining system integrity across sprawling industrial sites. With integrated signal enhancement and error correction protocols, the 8937-HN2 ensures that critical process data remains synchronized and accurate, even when field I/O is located kilometers away from the central control room.

Communication Performance and Hardware Metrics

• Interface Type: Single-mode Fiber Optic (SMF)

• Transmission Distance: Extends network reach up to 10 kilometers

• Data Throughput: Supports high-speed transmission up to 10 Gbps

• Power Requirements: 20V to 30V DC (Standard 24V DC nominal)

• Current Consumption: 85 mA Maximum

• Environmental Resilience: Operational from -40°C to +70°C

• Regulatory Compliance: IEC 61131-2, CE, TUV, UL508, and CSA certified

• Net Weight: 0.53 kg (Shipping mass approximately 0.4kg)

• External Dimensions: 16.5 x 7.5 x 12 cm

• System Origin: Manufactured in the USA

• Customs Tariff Code: 8537101190

Industrial Deployment and Networking Utility

The 8937-HN2 is a vital component for large-scale Distributed Control Systems (DCS) found in sprawling facilities such as offshore oil platforms, expansive petrochemical refineries, and municipal water treatment plants. By utilizing fiber optics, this module provides total galvanic isolation between different plant areas, effectively protecting the CNI2 I/O modules and central controllers from ground loops and lightning strikes. Its high-speed throughput makes it ideal for data-intensive applications, including high-frequency motor control and complex analytical monitoring. The ruggedized chassis is designed to be mounted on a Series 8 IOTA (I/O Termination Assembly), allowing for a high-density, space-efficient installation in outdoor or non-climate-controlled marshalling cabinets.

FAQ

Q: Does the 8937-HN2 support multi-mode fiber optic cables?

A: No, the 8937-HN2 is specifically optimized for single-mode fiber optic cables to achieve the 10km transmission range and high-speed data rates required for large-scale industrial infrastructures.

Q: Is this module compatible with standard Series 8 I/O configurations?

A: Yes, it is designed for seamless integration with Honeywell Series 8 hardware and is typically used to connect remote CNI2 series I/O modules back to the primary controller cluster.

Q: What is the benefit of using fiber instead of Ethernet for these connections?

A: Fiber optics are immune to electromagnetic interference (EMI) and radio frequency interference (RFI), which are common in industrial environments. Additionally, fiber allows for significantly longer distances (10km) compared to the 100-meter limit of standard copper Ethernet.

Q: Does the module require a separate power source?

A: The 8937-HN2 operates on a standard industrial 24V DC supply (20-30V DC range). In most Series 8 installations, this power is delivered through the IOTA carrier on which the module is mounted.

Q: Can this module be used in extreme cold or heat?

A: Yes, the 8937-HN2 is rated for a very wide temperature range, from -40°C to +70°C, making it suitable for deployment in both Arctic and desert climates without additional heating or cooling units.