---
title: What are the concerns while doing an RFID application using a standard IO-Link Master network block as compared to a dedicated RFID IO-Link Master BIS V?
description: Standard IO-Link Master network block as compared to a dedicated RFID IO-Link Master BIS V
---

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# What are the concerns while doing an RFID application using a standard IO-Link Master network block as compared to a dedicated RFID IO-Link Master BIS V?

## Standard IO-Link Master network block as compared to a dedicated RFID IO-Link Master BIS V

We can do the application using either or both even on the same network at the same time.

If we are exchanging a few bytes at a station, then a standard IO-Link Master block will do well  but if we have a large data exchange at a station then the dedicated RFID BIS V is a better  solution.

A mixed system is sometimes the best solution.

The points to be noted are :

**1. The r/w heads are different for both.**

In the case of the standard IO-Link Master block you need to order an IO-Link RFID head since it connects to an IO-Link port.  
For the dedicated RFID IO-Link Master you need to order any BIS V compatible head. This head connects to the any of the 4 dedicated ports on the BIS V and not to the IO-Link port of the BIS V.

**2 . The speed of data exchange is not the same.**

The IO-Link RFID head connected to the standard IO-Link Master block can have a maximum buffer size of 32 bytes per port in IO-Link 1.1 and that determines its speed of data exchange. Furthermore, there may be other components on the other IO-Link ports that also need to communicate. This can slow down the process.  
The dedicated RFID BIS V Master has a large buffer size of 128 bytes per port and not many other connected devices since it has just one other available IO-Link port. This is therefore much faster.  
Additionally, using Balluff High Speed High Memory we can achieve even faster data exchange using BIS V.

**3. The RFID over the standard IO-Link Master block is only possible with HF.**

The dedicated RFID BIS V IO-Link Master can be selected with multi-frequency. This can work across LF, HF and UHF. Each head can work on a different frequency simultaneously.

**4. The cable length between the r/w head and the standard IO-Link Master block can be up to 20m.**

The cable length in the case of the dedicated RFID IO-Link Master can be up to 50m.

 

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