Description
Note: Many products are not yet listed. Please contact us for more product information. Our supply channels are constantly expanding, and we currently have 20 stable shared supply channels. Please confirm the model, product, price, and all other necessary information with customer service before placing an order. We offer new, refurbished, and used products, and prices are adjusted according to the year of the item you require.
3. Product Introduction
Legacy DC drives do not retire quietly. When a 1395 frame faults out and the diagnostic LEDs point at the control board, the plant has two options: a capital replacement or a board swap. The 81001-340-71-R is the second option — a bench-tested PCB that drops into the card rack and restores the regulation loop the drive needs to hold speed under load. Revision letter matters here more than most buyers expect. Confirm the letter suffix on your old board and match it before you order (—though your mileage may vary depending on frame size and EPROM set).
81001-340-71-R
81001-340-71-R
81001-340-71-R
81001-340-71-R
4. Key Technical Specifications
| Parameter | Value |
|---|---|
| Catalog Number | 81001-340-71-R |
| Brand | Allen-Bradley (Rockwell Automation) |
| Product Type | Drive control board, PCB assembly |
| Host Platform | Bulletin 1395 DC drive card rack — verify slot position per frame size |
| Revision | “R” suffix — match to the old board’s suffix |
| Supply Rails | Verify with OEM datasheet |
| Connector Types | Ribbon header and edge connector — verify pinout against drive manual |
| Jumper/DIP Configuration | Site-specific — photograph before removal |
| Firmware/EPROM Set | Revision-dependent — confirm chip labels against old board |
| Operating Temperature | Verify with OEM datasheet |
| Condition | New Surplus or Refurbished |
| Warranty | 12 months |
5. Field Application & Technical Pitfalls (The Engineer’s Guide)
Where this board is critical:
- Paper and converting lines running 1395 drives on unwind/rewind stands, where speed regulation directly controls web tension.
- Extruders and wire drawing machines where a DC motor still does the work and the drive cabinet is the last untouched asset in the plant.
- Cranes, hoists, and older printing presses where the mechanical side is sound and the controls are on a “run to failure, then replace the board” plan.
Three pitfalls that bite during replacement:
- Revision letter and EPROM mismatch. The “-R” on the end is not decoration. A board built to a different revision can seat fine and still fault on power-up because the EPROM set or a trace-level change does not match your frame. Read the chip labels on the old board, not just the sticker.
- Jumper block settings. Replacement boards ship at factory defaults. Copy the jumper positions from the old board before you pull it — the header near the right-hand edge is the one that gets missed.
- Residual DC bus charge and ESD. The drive’s bus capacitors hold a lethal charge well after the disconnect opens. Wait for the DC bus indicator to go dark and meter the bus before you touch the card rack. Then ground yourself: the edge connector is static-sensitive, and a zapped board looks exactly like a dead spare.
Lesson learned: A maintenance tech swapped a faulted board for a shelf spare, powered up, and got an immediate overcurrent trip at zero reference. Root cause — a single jumper moved from the 2–3 position to 1–2, changing the current feedback scaling. The spare was good; the configuration was not. Thirty minutes of production lost to a photo nobody took.
6. Quality Control (QC) SOP & Transparency
- Inbound Verification. Each board is checked against the OEM packing list, label typography, serial number format, and date-code range. Chip markings and revision letter are logged before the unit enters stock.
- Live Rig Testing. The board is seated in a compatible 1395 card rack test fixture, powered on, and allowed to complete self-test. Reference and feedback paths are exercised at the test bench, and any fault codes are recorded.
- Parameter Testing. Supply rail voltages, connector continuity, and jumper header integrity are checked against the OEM datasheet where published. Undocumented values are flagged for buyer confirmation rather than guessed.
- Final QA & Packaging. The board ships in an anti-static bag with a QC-passed label, a test record showing the revision we verified, and photos of the jumper configuration when available.
7. Frequently Asked Questions (FAQ)
Can I swap this board with the drive energized? No. Open the disconnect, wait for the DC bus to discharge, meter it, and only then pull the board. The bus holds a dangerous charge long after the indicator lamp fades.
How do I confirm it matches my drive? Send the drive catalog number, frame size, slot position, the revision letter on the old board, and a photo of the chip labels. We cross-check against the test record before shipping. Exact fit still depends on your frame’s manual.
What’s the warranty? 12 months from delivery for functional failure under normal operation. Fuses, batteries, and other consumables carry a 90-day replacement guarantee.
How can I tell genuine OEM from refurbished? Genuine boards carry the original Allen-Bradley label with consistent typography and a traceable serial number. Refurbished units carry our QC tag in addition to the OEM label, and we disclose condition on the quote.
Does it come with the EPROM chips installed? Yes, unless you specify otherwise. Tell us the chip revision from your old board and we will confirm what is installed on the replacement before it ships.
Will I need to retune the drive after the swap? Possibly. If the replacement matches revision and jumper configuration, the stored parameters in the drive’s memory usually carry over. If the board carries parameter storage, expect to reload from your backup.
What do you need to quote the right replacement? Drive catalog number, frame size, old board revision letter, and photos of the label, chip set, and jumper block. That five-minute upload prevents most wrong-part returns.
