What this bus module does for an IM157 rack
The Siemens 6ES7195-7HE80-0XA0 is a bus module BM IM157 for the SIMATIC DP family, designed specifically to support the IM157 interface module in extended temperature environments. It enables the insertion and removal of the IM157 during operation — meaning you can swap the interface module without powering down the rack, which keeps the rest of the I/O live.
Extended temperature range — what it changes
The extended temperature range variant is the key differentiator from the standard BM IM157. While the standard module covers 0 °C to 60 °C, this version is specified for the extended range typical of SIMATIC DP components, allowing deployment in unheated cabinets, outdoor enclosures, or near process heat. If your BOM calls for the standard-temperature BM IM157 (6ES7195-7HE80-0XA0 is not that part), this extended-range version is the direct drop-in for applications where ambient conditions exceed the standard envelope.
Current production — sourcing angle
No official successor or replacement has been issued; the 6ES7195-7HE80-0XA0 remains the current order code for the extended-temperature BM IM157.
This bus module mounts directly on the SIMATIC DP rail and accepts the IM157 interface module. The hot-swap function means the IM157 can be inserted or removed while the backplane bus remains active — no need to cycle power to the entire station. The module is keyed to the IM157 form factor; verify your IM157 variant (standard vs. extended temperature) matches this bus module before specifying.