It looks that way from the documentation.
Is there a reason you want to use an external passive fail open kit with your sensor?
Does your sensor not have any internal fail open ports available?
Thanks for your answer. I'm thinking about it. Can you explain what are the differences between external fail-open and internal fail-open?
I'm not sure there is any difference between the external and internal fail open, the newer and higher end sensors seem to support built in fail open ports, so it seems it's just for legacy devices that you really need then external fail open kits.
The main difference is in the passive / active mode of operation, and the fail open / fail closed functionality, there is an explanation here.
Yes, the NS-7x00 only supports 1 External 'Passive' Fail Open kit per documentation.
Please see linked product guide and reference page 9.
A quick and easy way to tell the difference between active FOKs and passive FOKs
-Passive requires a control port on the sensor to provide power
-Active has an external power supply
Built in Fail Open is present Out of the Box on the Fixed Copper ports, there are modules that you can purchase to use with the NS7x00 series that also support internal fail open, below is a list;
Supports Internal Fail Open:
4-port 10/1 GigE SM 8.5 micron with internal fail-open
4-port 10/1 GigE MM 50 micron with internal fail-open
4-port 10/1 GigE MM 62.5 micron with internal fail-open
6-port RJ-45 1 GigE with internal fail-open
Does not support Internal Fail Open:
8-port (SFP+/SFP) 10/1 GigE
If you have any other questions let me know.
Thanks for your information. My Question is Internal fail-open vs External Fail-open. Which one is more preferred? And the reason for that.