Bus with two ADUM1401

Hi I would like create a bus SPI with two ADUM1401 and my master device.

I use like a MISO line VOD output of each ADUM1401.

ADUM1401  ------(VOD)-------|

                                              |

                                              |------(spi bus line MOSI)-------------master device                                          

                                              |

ADUM1401-------(VOD) -------|

But I have problems because these output lines VOD I think can't be join in the same line (MOSI),

I know that I can solve this problem disable VOD line with VE1 but I can get access at this line in this PCB.

Any idea to solve my problem?

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