---
title: Can the BIS V processor connect to BIS VL and BIS C R/W head at the same time？
description: Simultaneous connection of the BIS V processor to BIS VL and the BIS C R/W head
---

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# Can the BIS V processor connect to BIS VL and BIS C R/W head at the same time？

## Simultaneous connection of the BIS V processor to BIS VL and the BIS C R/W head

BIS C works with low frequency (LF) and uses two frequencies:

- 455 kHz for writing and
- 70 kHz for reading.

The processor units processes the data recorded by the read heads and relays it to the industrial fieldbus, which communicates with the PLC/PC.

With type BIS V processor units, you can operate up to four read heads at once – regardless of whether they are LF, HF or UHF.

 

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