Siemens
6ES7 378-2BA00-0AC0
Siemens 6ES7 378-2BA00-0AC0 W/ 6GK1140-1AA00 PLC Module Bundle S7-300 Industrial
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PLC Modules & Accessories
939 listings · 804 in stock
939 PLC modules & accessories listings from the brands you use, each one photographed. Free shipping to all 50 US states.
Industrial part
A2002
Contraves A2002 FAA2002 CSR Industrial Automation Controller Module Drive OEM
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Honeywell
053596-01
Honeywell Measurex 053596-01 Video Memory Vision Module PLC Board Industrial OEM
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Guides for PLC Modules & Accessories
- Obsolete partsFinding Obsolete Siemens, GE Fanuc & Fanuc PartsHow to read Siemens order numbers, GE Fanuc catalog numbers and Fanuc part numbers, which version details matter, and where surplus fits.
- Parts identificationHow to Read Siemens Order Numbers (MLFB)What the 6ES7, 6SL3, 3RT and 3VA prefixes mean, where to find the product version and firmware, and what to check before you swap a Siemens part.
Troubleshooting guides
- TroubleshootingPLC Won't Go to RUN? Allen-Bradley Mode and Fault ChecksKeyswitch and mode-switch positions, the faults that block RUN, firmware and project mismatches, missing or wrong I/O modules, forces, and the order to check them in.
- TroubleshootingControlLogix & CompactLogix Major Fault Codes ExplainedMajor fault types and codes (T01 power-up to T07 memory), where to read them in Studio 5000, minor vs major vs I/O faults, the first checks and clearing a fault safely.
- TroubleshootingSiemens S7-300/S7-400 SF & BF LEDs and Diagnostic BufferSF vs BF (and INTF, EXTF, BUSxF on the S7-400), steady vs flashing, reading the diagnostic buffer in STEP 7, and the first checks for modules, PROFIBUS, PROFINET and backup batteries.