Siemens · S7-300 · PLC I/O module

Siemens 6ES7 322-1BL00-0AA0

Phase-out started (PM400)MEDIUM

What should replace this part?

Your options

Our analysisSource used / refurbished bridge

Surplus and refurbished channels carry the exact module; spare-parts horizon runs long, so bridge economics matter.

Our analysisScope ET200MP / S7-1500 replacement

Platform direction is S7-1500 with ET200MP I/O; the exact successor module must be selected from current catalog.

Replacement analysis

Original: 6ES7 322-1BL00-0AA0 (SM322 32xDO 24VDC 0.5A)

↓

Replacement: unknown (ET200MP/S7-1500 platform direction only)

Relationship: Modern platform migration (not a swap) MEDIUM

Migration / engineering work required — not a drop-in. This is not presented as a drop-in replacement.

Analyst note: SIOS datasheet Tier A confirms identity+spare-part flag. No exact successor MLFB verified.

What changes?

Hardware	S7-300 rack converts to S7-1500 or ET200MP stations.
Wiring	40-pole front connector must be rewired to the new module.
Software	Hardware configuration converts to TIA Portal.

Anything not listed here is unknown — the evidence does not establish it.

Can I still buy the original?

Repair: Unknown — not verifiedUsed: Verified — see evidenceRefurbished: Verified — see evidence

New-original availability is not claimed unless evidence supports it. Availability is never implied by the existence of a listing alone.

Lifecycle

Status: Phase-out started (PM400)

Discontinuation date: 2023-10-01

Lifecycle source

Evidence

Every important claim traces to a source below. OEM source means the manufacturer published it; third-party source means a distributor, repair company or reseller states it; our analysis connects them — and is labeled as such.

OEM / manufacturer sources

OEM source HIGH Siemens SIOS · Tier A · 2025-04-07

Datasheet flags unit as spare part; SM322 32DO 24VDC 0.5A

“***spare part*** SIMATIC S7-300, digital output SM 322, isolated, 32 DO, 24 V DC, 0.5 A”

Establishes: exact_same_part · View source · Note: Identity/spec proof; not successor evidence

Third-party sources

Third-party source MEDIUM Siemens Industry Mall via distributor mirror · Tier B · 2026-09-10

PM400 Phase Out Started since 01.10.2023

“Product Lifecycle (PLM) PM400:Phase Out Started / phase-out since: 01.10.2023”

Establishes: modern_platform_migration · View source · Note: OEM PLM field via mirror; SIOS confirm needed for HIGH

Why you might be searching this

SM322 spare-part flag in TIA; which ET200MP module replaces 32 x 0.5A outputs?

Related replacement analyses

Siemens 6ES7 315-2AG10-0AB0 — Same family: S7-300

Need help deciding between repair, replacement, or migration?

Request a replacement review for 6ES7 322-1BL00-0AA0 — repair assessment, sourced original, replacement quote, or migration scoping.

Request a replacement review

Research status: done. Confidence MEDIUM reflects the evidence above, not marketing. Commercial paths: Used / refurbished bridge · ET200MP / S7-1500 quote. No search-volume, pricing or revenue claims are made on this page.