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What is the purpose of VW3A3502?

The VW3A3502 multi-pump card ensures compatibility of pump applications developed for an Altivar 38 drive with an Altivar 61, without reprogramming.
With this card, a complete pumping installation (up to 5 pumps) can be controlled with a single drive, providing constant pressure.
It incorporates the following operating modes:
Single or multiple variable
Single or multiple variable with changeover of auxiliary pumps
Single or multiple variable with limitation of operating time between pumps
These last two operating modes can be combined.

It is specially designed for applications such as:
Constant pressure water distribution and pumping systems
Booster stations

Attached VW3A3502 programming manual for more information.
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