The Siemens 6ES72121AF500XB0 is a fail-safe CPU with 8 digital inputs and 6 relay outputs on screw terminals. Ethernet interface and 24 V DC supply are standard; no local display.
6ES72121AF500XB0 PLC, 8DI, 6DO Relay, Ethernet
MPN 6ES72121AF500XB0
Siemens S7-1200 series fail-safe CPUs, Programmable (PLC, PAC), 8 Inputs, 6 Relay Outputs, Ethernet, Screw Terminal, 24V DC, No Display.
Dispatch SLA24-48h Global Rush
Quality CheckOriginal Seal & Physical QC
IncotermsDAP / DDP Available
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Worldwide DispatchDHL/FedEx — transit quoted per order
Independent China distributor & stockist· Listing updated Sep 2026
Specifications
| Parameter | Value |
|---|---|
| I/O channels | 8 |
| Output signal | Relay |
| Display type | No Display |
| Terminal type | Screw |
| Interface | Ethernet |
| Supply voltage | 24 V DC |
| Mounting fastener | Panel |
| Is profinet IO device | false |
| Is profinet IO controller | false |
Product details
Frequently asked questions
What are its key I/O specifications?
8 digital inputs and 6 relay outputs, all on screw terminals, powered by 24 V DC.
What type of outputs does it have?
Relay outputs, suitable for switching AC or DC loads within rated limits.
6ES72121AF500XB0 Datasheet
MPN
6ES72121AF500XB0