Control A 12VDC Door Strike From 2 Different Sources?

I have a customer that has a shared door with another company in the building, each with their own access control.

Any recommendations on how to connect the strike ?

1 - Use diodes in line with the 2ea. 12v sources from controller to strike ?

2 - Use a couple of SPST relays that completely isolates the 2ea. 12v sources

Login to read this IPVM discussion.
Why do I need to log in?
IPVM conducts unique testing and research funded by member's payments enabling us to offer the most independent, accurate and in-depth information.

** *** ******* * door ****** ****** *** I ***** *** * power ****** ********* *** this ****. * **** they *** ******* ******* the ****. *** ***'* they ***** * ***** source ***?

*** * ***** ****** board **** *** *** input ******** (******* ** an ******** ****).

**** *** *** ***** from ****** ***. ***** still **** **** **** design *** * ***** first *******.

** **** ******** **** to ******* *** **** status ** **** *******, you'd **** ** **** both ******* ******* *** RX ******, ******* * signal **** *** ***** system ********* *** ******* hardware, *** ******* * DPDT **** *******.

** ****'* *****, * agree **** ******** ** entirely. *** *** ** rarely ***** *** *** added **********, ** ** can **** **** * troubleshooting ****.

*** ******* ***** ***** how ** ** ******** strike *** ** ***** to *** ********* ****** control ******* ***** *********** electrical ********* ******* *** two *******. ** ****** or **** ** *** systems ** ********** *** status ** *** ****, then ** ********** ***** may **** ** ** added ** **** *** system ********* *** *******-**-**** input ** *** ***** system *** **** *****.

*******- **** ** *** scenario ***** *** ******* has **** ***** ** an ******** **** ***** system.. **** ****** ** able ** ******* *** strike *** **** **** to ** ******** (****** diodes).

***** *** ******** ************** here **** ***** ********* the "*****" ****** -- i.e. ***** *** **** is *******, ***** *** head-end ********* *** *** both *** "******" ****** and *** "********" ****** (assuming **'* * ******/******** scenario), *** ***...

**** ****, *** ** the **** * ****** to ** ****, ************ if ** ** * tenant/building *********, ** ** simply ******* * ********-**** output **** *** ****** access ******* ****** ** an ***** ** *** building ****** ******* ******. From *****, ** ****** have *** ******** ****** control ****** ******* *** unlocking ** *** ****.

**** *** ******** ***** from ***** *** ******* pointed **** *** ********* to *** *****. ** the ****** ********** *** confirm **** *** ****** is ******* *********, **** the **** ** ******** on *** ******** ** ensure **** ***** ****** is ********* ********* **** their ***** ** *********. While ** ********** *****, any **** *** ***** using *** ****** **** Michael ********, ** *** cause **** ** ******** fingers ** *** ** responsible *** ****** ** if ** ******.

* ****** **** ******* for * ****** ************ and **** ****'* *** any ******* ******* ** from * ********* *******. Worst **** ******** **** relays ******** **** *** still **** *** ******* through *** *******.