Older S5 PLC's

The models you listed may work; however, we haven't specifically tested with them. The Protocol used and devices tested are listed below.

Communication Protocol

AS511 Current Loop

Supported Devices

Siemens S5 - 90U
Siemens S5 - 95U
Siemens S5 - 100U - 100
Siemens S5 - 100U - 101
Siemens S5 - 100U - 103
Siemens S5 - 101U
Siemens S5 - 115U - 941
Siemens S5 - 115U - 942
Siemens S5 - 115U - 943
Siemens S5 - 115U - 944
Siemens S5 - 115U - 945
Siemens S5 - 135U - 921
Siemens S5 - 135U - 922
Siemens S5 - 135U - 928
Siemens S5 - 155U - 946
Siemens S5 - 155U - 947

See this FAQ for a full list of supported processors.