DS3800NFIB | Mark IV Fiber Optic I/O Interface Module

Description

Product Introduction

The DS3800NFIB is a fiber optic interface board for the Mark IV control system—the “I” in the suffix indicates interface functionality, and the “B” is a manufacturing revision. This board provides the physical interface between the Mark IV backplane and fiber optic I/O links, performing signal conditioning, optical-to-electrical conversion, and status monitoring. It was typically used in installations where fiber optic connections to remote I/O cabinets or field devices needed to be terminated and conditioned before reaching the Mark IV CPU.

The board plugs into the Mark IV backplane and provides termination for fiber optic cables, signal conditioning for the optical receivers and transmitters, and status monitoring for the fiber links. Compare this to the DS3800NFIA (a similar adapter/interface board with slightly different functionality). The NFIB is typically used in configurations where the fiber optic I/O requires a higher level of signal conditioning or where the interface configuration is different. Both boards serve similar purposes—termination and signal conditioning for fiber optic links.

Key Technical Specifications

Compatible Replacement Models

Frequently Asked Questions (FAQ)

What does the NFIB board do?
The NFIB is a fiber optic interface board. It provides termination, signal conditioning, and optical-to-electrical conversion for fiber optic I/O links between the Mark IV backplane and remote devices. It’s part of the fiber optic communication chain, providing the physical interface and status monitoring.

What’s the difference between the NFIB and the NFIA?
The NFIB and NFIA are similar boards—both provide fiber optic interface and signal conditioning. The NFIB is typically used in configurations where a higher level of signal conditioning is required, or where the interface configuration is different. They are often interchangeable, but check your system configuration before mixing board types.

Is the NFIB a standalone communication board?
No, the NFIB is an interface board—it provides termination and signal conditioning, but relies on other boards for the full communication function. It’s part of a larger fiber optic system, working in conjunction with other fiber optic boards.

Can I use the NFIB with the newer long-haul fiber boards?
It depends on the configuration. The NFIB was designed for the standard fiber system. It may not be compatible with long-haul boards that use different wavelengths. Check your system configuration before mixing board types.

Can I hot-swap this board?
No. Mark IV backplanes are not hot-swappable. Power down the cabinet, lock out the breaker, and wait 60 seconds before removing or installing the board.

What’s the most common failure mode on the NFIB?
We’ve serviced about a dozen NFIB boards. The most common failure is the signal conditioning circuitry—it can degrade over time, causing intermittent link errors. The second most common failure is the edge connector—corrosion from humidity. The board is repairable.

What’s your warranty and lead time?
We stock the NFIB in limited quantities. Lead time is 1-2 business days. We offer a 1-year warranty. We test every board with a 24-hour burn-in and a diagnostic verification. The test report is included.

Is this board compatible with the Mark VIe?
No. This board is for Mark IV systems only. The backplane architecture is different.

ABB 3BSE042236R2
SIEMENS 6GF6233-6MB
NI PXIE-6548
ABB 3HAC029818-001