Email: jiedong@sxrszdh.com
Phone / Wechat：+86 15340683922Description
Product Introduction
The DS3800NLBA is a local bus adapter board for Mark IV systems—the “L” in the suffix indicates local, the “B” indicates bus, and the “A” is a manufacturing revision. This board provides local bus connectivity and signal distribution within the Mark IV rack and to adjacent equipment. It was used in installations where local bus signals needed to be distributed between boards or to external equipment.
The board plugs into the Mark IV backplane and provides a local bus interface. Compare this to the DS3800NECA (Ethernet communications) or the DS3800NGDC (general-purpose communications). The NLBA is specifically for local bus applications where signal distribution within the rack is needed.
Key Technical Specifications
| Parameter | Value |
|---|---|
| Interface Type | Local bus adapter |
| Bus Interface | Mark IV local bus |
| Backplane Interface | Parallel, Mark IV-specific |
| Diagnostic LEDs | Power, Link Status, Fault |
| CPU Compatibility | DS3800DMP series (Mark IV) |
| Backplane Current Draw | +5V DC @ 0.7A, +12V DC @ 0.3A |
| Operating Temperature | 0 to 60°C (non-condensing) |
| Dimensions | 328 mm x 185 mm x 20 mm (full-length Mark IV) |
| Mounting | Standard Mark IV rack slot |
| Configuration | No DIP switches—hardware address fixed |
Compatible Replacement Models
| Model | Compatibility Level | Notes |
|---|---|---|
| DS3800NLBA1 | ✅ Drop-in Replacement | NLBA with minor revision. Same functionality. |
| DS3800NGDC | ✅ Drop-in Replacement | General-purpose communications—may be interchangeable depending on configuration. |
| DS3800NECA | ❌ Functionally Incompatible | Ethernet board—different function. |
| DS3800NFCD | ❌ Functionally Incompatible | Fiber optic board—different function. |
| DS3800NFCF | ❌ Functionally Incompatible | Fiber optic board—different function. |
Frequently Asked Questions (FAQ)
What does the NLBA board do?
The NLBA is a local bus adapter board for Mark IV systems. It provides local bus connectivity and signal distribution within the Mark IV rack and to adjacent equipment.
What’s the difference between the NLBA and the NGDC?
The NLBA is specifically for local bus signal distribution within the rack. The NGDC is a general-purpose communications board. The NLBA is for internal bus signals; the NGDC is for external device connectivity.
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 NLBA?
We’ve serviced about a dozen NLBA boards. The most common failure is the bus interface circuitry—it can degrade over time, causing signal integrity issues. 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 NLBA 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.
GE IC695CRU320
A-B 1756-L73
ABB PM803F
ABB 3HAB8101-18/09A
Email: sales@plcfcs.com- Phone：+86 15343416922
- Wechat：+86 15343416922
Wechat：+86 15343416922PLC : Allen Bradley , Siemens MOORE, GE FANUC , Schneider
DCS : ABB ,Honeywell, Invensys Triconex , Foxboro , Ovation,YOKOGAWA, Woodword, HIMA
TSI : Triconex , HIMA , Bently Nevada , ICS Triplex
Complete service we offer
Payment: T/T
Delivery: 1-2 days
Shipment: DHL UPS FedEx, etc
After-sales service: Yes, 24/7 hours
