DS3800NFCF1D1C | New Surplus GE Turbine Control Board

Description

Product Introduction

The DS3800NFCF1D1C is the single-channel version of the NFCD1H1D, offering the same extended range and ruggedization in a single-channel package. The suffix tells the story: the first “1” indicates a hardware revision. The “D” specifies 1300nm long-wave transceivers with an APD receiver and a 22dB optical budget—enough for 8km on standard multimode fiber. The second “1” adds the full diagnostic suite (optical power monitoring, link quality trending, and error logging). The final “C” is the environmental package: dual-layer conformal coating with UV-resistant topcoat. This board was designed for single-link installations where the distance exceeds 5km—and where environmental conditions require robust protection.

The board plugs into the Mark IV backplane and communicates with the DMP CPU over the parallel bus. The 1300nm APD receiver is more sensitive than the LED-based receiver on the 1C1C, giving you 4km of additional reach. Compare this to the NFCF1C1C (5km range, LED receiver, same coating). The 1D1C gives you 60% more reach with the same environmental protection. If you’re running a single link across a large site or campus, this board gives you the range without the complexity of repeaters.

Key Technical Specifications

Compatible Replacement Models

Frequently Asked Questions (FAQ)

What’s the difference between the 1D1C and the 1C1C?
The 1D1C uses an APD (avalanche photodiode) receiver, which is more sensitive than the PIN photodiode used on the 1C1C. The APD requires a higher bias voltage (hence the increased +12V current draw) but gives you 4km of additional reach: 8km versus 5km. The 1D1C also has a slightly better optical power budget (22dB versus 18dB). If you need the extra range, the 1D1C is the board you want. If your link is under 5km, the 1C1C is more cost-effective.

What’s the APD bias status LED?
The APD (avalanche photodiode) requires a high-voltage bias (typically 40-60V) to operate correctly. The APD Bias Status LED indicates that the bias voltage is within specification. If the LED is red, the bias voltage is out of range—the board may not achieve full sensitivity, and the link budget will be reduced. This can happen if the backplane +12V rail is low. Check your power supply if you see a red APD Bias LED.

Do I need to upgrade my DMP firmware for this board?
The APD bias control and predictive diagnostics require DMP firmware v4.0 or later. If you’re running an older firmware version (v3.x), the board will still work, but the APD bias might not be optimal and the diagnostics won’t be available. We can provide the firmware EPROMs for the upgrade if needed.

Can I use this board with single-mode fiber?
The 1D1C is designed for multimode fiber (62.5/125µm) with ST connectors. The APD receiver is sensitive enough to work with single-mode fiber in some cases, but the transceivers are LED-based and weren’t designed for single-mode coupling. You’ll likely get 3-4km range on single-mode fiber, which defeats the purpose of the board. Use multimode fiber for full performance.

What’s the most common failure mode on the NFCF1D1C?
We’ve serviced about a dozen 1D1C boards. The most common failure is the APD bias voltage supply—it’s a DC-DC converter on the board that can fail after 15-20 years. The symptom is a red APD Bias LED and a link that’s intermittent or has reduced range. We replace the DC-DC converter module. The second most common failure is the edge connector—corrosion from humidity. We clean it with a fiberglass brush and isopropyl alcohol. The board is repairable.

Can I use this board with a standard NFCF at the other end?
Yes, as long as the remote node is configured correctly. The 1D1C can communicate with standard NFCF boards—the protocol is the same. The maximum range is limited by the standard board’s receiver (-22dBm). The practical maximum distance with a standard NFCF at one end is about 2.5km. To get the full 8km range, you need the 1D1C at both ends.

What’s your warranty and lead time?
We stock the NFCF1D1C in limited quantities. Lead time is 2-3 business days. We offer a 1-year warranty. We test every board with a 24-hour burn-in, a fiber optic loopback test (with a spool of 8km fiber), and a diagnostic verification (optical power monitoring, predictive alert test). 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.

ENTERASYS A2H124-24FX
TRICONEX 3625
GE VMIACC-5595-208