Honeywell 8937-HN Fiber Optic Module

The Honeywell 8937-HN serves as a specialized communication link within the Experion Series 8 I/O architecture. This fiber optic extender module facilitates high-speed data transmission over significant distances. It effectively bridges the gap between remote I/O clusters and the central control network. Consequently, users can deploy I/O hardware closer to field equipment while maintaining noise-immune communication.

This module utilizes fiber optic technology to eliminate electrical interference issues common in long-distance copper wiring. It supports Fault Tolerant Ethernet (FTE) protocols to ensure maximum system availability. Furthermore, the unit integrates with the CNI2 interface series for seamless control logic execution. This connectivity makes it an essential component for geographically distributed Distributed Control Systems (DCS).

Core Technical Specifications

Signal Integrity and Isolation Performance

Protection against electrical surges remains a primary function of the 8937-HN hardware. The module features comprehensive channel-to-channel and channel-to-ground isolation. This design prevents ground loops from damaging sensitive control electronics. Moreover, the Common Mode Rejection Ratio (CMRR) exceeds 100 dB at standard industrial frequencies.

The module handles diverse output types for flexible field application. It manages standard voltage ranges such as 0-10 V and current loops like 4-20 mA. An impressive update rate of up to 10 kHz per channel allows for rapid control responses. Because of this speed, the module excels in critical automation tasks requiring real-time accuracy.

Environmental Durability and Reliability

Honeywell engineered the 8937-HN to withstand the rigors of heavy industrial environments. The unit operates reliably within a broad temperature range from -20°C up to +60°C. Additionally, it meets IEC 60068-2 standards for mechanical vibration and shock resistance. This rugged construction ensures a long service life in demanding plant conditions.

The extender module also supports redundant configurations to prevent single points of failure. This redundancy is vital for processes where downtime leads to significant financial loss. Compliance with EN 61000-6-2 and EN 61000-6-4 EMC standards further guarantees stable operation near high-voltage machinery.