What this PROFIBUS master module does in the rack
The Siemens 6ES7180-0AA00-0XA0 is a SIMATIC DP master module for PROFIBUS DP networks, built around the ASPC2 ASIC and an 80C165 processor clocked at 40 MHz. It handles master applications only — it does not operate as a slave on the bus. The dual-port RAM interface lets the host CPU exchange process data without holding the backplane bus, keeping the cycle time deterministic for the field devices on the segment.
Baud rate, memory, and power draw
Maximum transmission rate is 12 Mbit/s. Onboard memory is 2x 128 KB, with 80 KB of firmware scope. Typical current draw is 250 mA from the 5 VDC backplane supply, which keeps the thermal load inside the rack manageable even in a densely populated subrack.
Spare-part status and sourcing
No official successor or cross-reference exists. Confirm the slot type and firmware version in the existing rack before committing.