Blog
Technical guides for identifying PLC, DCS, HMI and I/O spare parts by exact model number, reading module codes, and preparing an accurate inquiry.
SIMATIC ET 200SP Module Identification Guide
How to read an ET 200SP order number, tell the DI, DQ, AI and IM module families apart, map SIPLUS 6AG1 to standard 6ES7, and prepare an accurate module inquiry.
SIPLUS 6AG1 vs Standard 6ES7 Order Numbers
How Siemens SIPLUS 6AG1 order numbers map to standard 6ES7 base parts, why extended-temperature ET 200SP modules differ, and how to identify spares.
SIMATIC HMI Panel Identification Guide
Identify Siemens SIMATIC HMI panels by 6AV order number, screen size and interface to prepare an accurate spare-part inquiry.
SIMATIC S7-1200 CPU & Module Identification Guide
How to identify Siemens SIMATIC S7-1200 CPUs and modules by 6ES7 order number, power supply type and I/O layout for an accurate inquiry.
SCALANCE Industrial Ethernet Sourcing Guide
How to identify Siemens SCALANCE industrial Ethernet switches by 6GK order number, port count, and managed vs unmanaged type before you file an inquiry.
How to Source Obsolete DCS Modules
Why DCS modules go obsolete, the downtime risks, where surplus and refurbished modules may originate, verification steps, and migration planning.
Siemens S7-300 Parts Guide
A guide to Siemens S7-300 maintenance parts: CPUs, signal modules, communication processors, power supplies, end-of-life status, and sourcing options.
Allen-Bradley ControlLogix vs CompactLogix: Which Spare Parts Do You Need?
Compare Allen-Bradley ControlLogix (1756) and CompactLogix (1769) platforms, typical modules, use cases, and how to source the right spare parts.
Bently Nevada 3500 Monitoring System Review Guide
A procurement guide to the Bently Nevada 3500 rack system: monitor and relay modules, 3300 XL proximitors, condition options, and sourcing tips.
PLC Spare Parts Procurement Checklist
A practical procurement checklist for MRO teams: critical spares lists, planning notes, condition terms, supplier vetting, and urgent requests.
How to Identify the Right PLC Spare Part Number
Learn to read the nameplate, decode part-number structure, check firmware, match the chassis, and gather the right info before sending a PLC spare part inquiry.