VEE-ARCPC7000-11PWM 7000 AC Drive Regulator Board, Variant -11, Plug-In Control Card

Product Description

What this part is

A Vee-Arc PC7000-11 regulator board, the control card from the Vee-Arc PWM 7000 series AC variable frequency drive. The regulator board is where the drive’s brain lives: it takes the speed reference, runs the volts-per-hertz regulator, generates the pulse-width-modulation firing pattern for the output transistors, and handles the drive’s protection and fault logic.

Correcting the source data

Earlier copy described this as a board designed for the Furnas product line, promoting precise control of various industrial processes. Two things to sharpen. First, the platform: this is an AC PWM inverter drive board, from the PWM 7000 family — not a DC drive card. Second, the brand relationship: Vee-Arc was not a Furnas sub-line in the ordinary sense. Vee-Arc drives were made by Vee-Arc Corporation and sold as Furnas Electric’s variable frequency drive range, which is why the same boards appear under both names.

Decoding the part number

PC — Vee-Arc’s prefix for a plug-in printed circuit card7000 — the PWM 7000 drive family. The related Micro 7000 range is a different and later product; boards do not cross between them.11 — the board variant. Vee-Arc used suffix variants on the same base card — PC7000-11, PC7000-U11, PC7000-UQ10 and others — and they are configured differently, so the suffix is not decoration.
Vee-Arc also carried a parallel 900-series numbering for the same cardset: 900-709 is catalogued as a PWM 7000 AC drive regulator board and 900-760 as the PWM 7000 DC braking board. If your machine’s documentation quotes a 900-number, that is the same family of hardware under a different scheme.

Support status: read this before you buy:
This matters more than any spec on the board. Siemens acquired Furnas Electric in 1989 but did not acquire the rights to the Vee-Arc drive product, so the line was orphaned at that point. There is no OEM behind it, no factory spares channel, and no manufacturer technical support. What that means in practice: a running PWM 7000 is kept running with surplus boards and independent repair houses, and there is no upgrade path within the family. If the machine is worth keeping, buying the spare while one exists is the whole strategy. If it is not, this is the point at which people replace the drive with a modern VFD instead.

Published specifications

Function: regulator / control board for an AC PWM variable frequency drivePlatform: Vee-Arc PWM 7000 series AC driveBoard variant: -11Form factor: plug-in printed circuit card, drive chassisBrand lineage: Vee-Arc Corporation, sold as the Furnas Electric variable frequency drive lineManufacturer part number: PC7000-11

Installation and setup notes

Isolate, lock off and confirm the DC bus has fully discharged before opening the drive — on a drive of this age assume the bleed resistors may have failed and verify with a meter rather than trusting time. Photograph every ribbon, plug and terminal and record the card positions before removal, because there is no manual coming to tell you later. Note the exact suffix on the card you take out and match it. Check the outgoing board for potentiometer settings and jumper links and transfer them; drives of this generation set acceleration, deceleration, current limit and V/Hz slope with trimpots on the regulator card rather than in software, so a fresh board will be at factory settings and will need adjusting to your machine. Bring the drive up uncoupled or on a small test motor first, and confirm current limit and the stop path before putting a load on it.

Quantity and configuration

One regulator board. Not included: the drive chassis, power stage, DC braking board, other cards from the cardset, ribbon cables, connector kits, fuses and any documentation.

Interchange guidance

Match the suffix. PC7000-U11 and PC7000-UQ10 are related regulator boards from the same family but different variants, and should be treated as related items rather than drop-in equivalents. Micro 7000 drives, such as the MCH411K1, use different hardware entirely. Also written PC700011, PC 7000-11, PC-7000-11, PC7000 11 and VeeArc PC7000-11, and found under the Vee-Arc, VeeArc, Vee Arc and Furnas Electric names.