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6ES72141BG400XB0
Siemens

6ES72141BG400XB0 SIMATIC S7-1200 PLC CPU 14DI/10 Relay AC

MPN6ES72141BG400XB0
Active · In production

The 6ES72141BG400XB0 is a SIMATIC S7-1200 PLC CPU with 14 digital inputs and 10 relay outputs, designed for standalone control tasks that accept AC mains voltage directly without an external DC supply. It ships as a compact DIN Rail module with Ethernet/RJ45 programming port, 100kB onboard memory, and operates between 20°C and 60°C in IP20 enclosures.

PackagingBulk
StockOut of Stock

Specifications

6ES72141BG400XB0 Technical Specifications - Column 1
ParameterValue
RoHSROHS3 Compliant
SeriesSIMATIC S7-1200
MountingDIN Rail
ExpansionNon-Expandable
Number Of Inputs14 - Digital
Ingress protectionIP20
6ES72141BG400XB0 Technical Specifications - Column 2
ParameterValue
Memory100kB
DisplayNo Display
ApprovalsCE, cULus, FM, UL
CommunicationsEthernet, RJ45
Number Of Outputs10 - Relay

Product details

Application: AC-Mains Standalone PLC for Fixed I/O Machines

When a project needs a self-contained PLC that draws power straight from 120–230 VAC without an external DC power supply, the 6ES72141BG400XB0 fits directly into a standard AC distribution circuit. It provides 14 sinking digital inputs and 10 relay outputs rated for inductive loads—useful for motor starter coils, indicator lamps, and contactors on the same rail.

On-page parameter snapshot

  • Supply: 120 to 230 VAC (AC/DC/RELAY configuration)
  • I/O: 14 Digital Inputs + 10 Relay Outputs
  • Memory: 100 kB
  • Communications: Ethernet (RJ45)
  • Operating temperature: 20°C to 60°C
  • Mounting: DIN Rail
  • IP20 / CE, cULus, FM, UL approved
  • Non-expandable / No onboard display

Procurement notes

Verify lead time and MOQ for your project quantity before confirming delivery milestones. The "B" in the MPN suffix indicates AC input / relay output; confirm this matches your power bus and load type. The module is non-expandable—no additional signal modules can be attached.

Selection notes — BOM and electrical class

If your machine panel already has a 24 VDC bus, consider the 24 VDC variants (6ES72141HG400XB0) for a consistent power architecture across the control cabinet. Relay outputs on the 6ES72141BG400XB0 are isolatedSPST contacts; they do not provide PWM or high-speed pulse outputs. For motion or high-speed counting, look at the 1215-family units that include pulse outputs.

Engineer's notes — electrical baseline

When siemens 6ES72141BG400XB0 (CPU 1214C, AC/DC/RELAY, 14DI/10D); category path: Industrial Automation and Controls > Controllers > Programmable (PLC, PAC); confirmed specs: series: SIMATIC S7-1200; Voltage - Supply: 120 ~ 230VAC; Mounting Type: DIN Rail; Package: Bulk; Product Status: Active is on the short list, reconcile every printed parameter (voltage tiers, current capability, package) with the schematic net names and protection devices you already committed.

Field notes for cabinet wiring checks

Field work should confirm grounding, shielding, and bus coordination with adjacent racks—especially when the raw record shows tight voltage or current margins.

What buyers are searching for

Engineers sourcing a standalone SIMATIC S7-1200 AC-powered CPU with fixed relay outputs for a machine that already uses AC distribution. Focus on input/output counts, supply voltage match, and DIN Rail footprint.

Engineering notes

  • The AC input stage (120-230VAC) eliminates the need for a 24VDC power supply in the cabinet.
  • 10 relay outputs are SPST contacts; confirm load voltage and current ratings against your connected devices.
  • 100kB memory supports mid-size programs but not the larger programs possible on 1215/1217 siblings.
  • Non-expandable—no signal modules (SM) can be added; all I/O must fit within the 14DI/10DO onboard count.

When to choose this part

  • Match supply voltage first: if the panel uses 24VDC everywhere, a 24VDC variant reduces power-supply complexity.
  • Confirm relay output current rating covers your load; for solid-state switching at high frequency, evaluate the 6ES72141AG400XB0 (solid-state outputs).
  • When 14DI/10DO is insufficient I/O for the machine, step up to the 1215 or 1217 family which offers more I/O or expansion capability.

Limitations & things to verify

  • Non-expandable: no signal modules (SM) can be attached to increase I/O count beyond 14DI/10DO.
  • No onboard display; diagnostics and operator interface require TIA Portal, HMI panel, or web-based access.
  • Operating temperature bottom bound is 20°C—do not specify for cold-climate outdoor enclosures without supplementary heating.
  • Relay outputs are not suitable for high-speed PWM or pulse-output motion control; those applications need 1215/1217 variants.

Frequently asked questions

What is the difference between the BG and HG suffixes on S7-1200 CPU 1214C?

The BG suffix indicates AC input (120-230VAC) with relay outputs; the HG suffix indicates DC input (24VDC) with relay outputs. Both share the same 14DI/10 Relay I/O and 100kB memory.

Can I add extra I/O modules to the 6ES72141BG400XB0?

No. The module is non-expandable. All I/O must fit within the onboard 14 digital inputs and 10 relay outputs.

What programming software is used?

Siemens TIA Portal ( Totally Integrated Automation Portal) is the standard engineering environment for the SIMATIC S7-1200 family.

Does this CPU support Modbus or other industrial protocols?

The onboard Ethernet port supports standard S7 communication and PROFINET. Additional serial protocols require an optional CM (communication module) expansion that is not supported on this non-expandable unit.

Technical resources

Lifecycle: ActiveRoHS: ROHS3 Compliant