Families:
LinPAC series meet your need with different numbers of slot. Also, there are more than 160 I/O modules for your consideration. You can easily customize your LinPAC with the modules you want to use. Sorted by the numbers of slot, there are LP-8141, LP-8441, LP-8841 in the LinPAC family.
All LinPAC series are able to run in a wide range of temperature (-25¢XC ~ 75¢XC).
More information about LinPAC series, please visit the following website.
http://www.icpdas.com/products/PAC/linpac-8000/introduction.htm
P.S.
LinCon-8x3x is phased out because one of chips from Intel is no longer supplied. Please upgrade LinCon from 8x3x to 8x4x in your new project. The program developed for LinCon-8x3x can run on LinCon-8x4x without any modification.