Siemens CPU 1214C AC/DC/Relay PLC — 6ES72141BG400XB0
Overview
The 6ES72141BG400XB0 is a Siemens S7-1200 compact programmable logic controller with an AC/DC input power topology and relay-type digital outputs. It provides 14 digital inputs and 10 relay outputs, 100 kB user memory, and Ethernet/RJ45 programming and communications interface. The device ships as a bulk unit with DIN-rail mounting and carries IP20 ingress protection.
Key Parameters
| Parameter | Value |
|---|---|
| MPN | 6ES72141BG400XB0 |
| Brand | Siemens |
| Series | S7-1200 CPU 1214C |
| Input Power | AC/DC (specific ratings not provided in supplied fields) |
| Output Type | Relay, 10 channels |
| Digital Inputs | 14 |
| Memory | 100 kB |
| Communications | Ethernet, RJ45 |
| Display | None |
| Mounting | DIN Rail |
| Expandable | Non-Expandable |
| Ingress Protection | IP20 |
| Operating Temperature | 20°C to 60°C |
| Approval Agency | CE, cULus, FM, UL |
| Encapsulation | Bulk |
⚠ Verification required — Selection must not proceed on electrical ratings. The data source did not provide: input voltage range, input current draw, relay contact ratings (voltage/current/power), digital input voltage thresholds, or isolation specifications. The official Siemens S7-1200 system manual and the CPU 1214C data sheet must be consulted before finalizing a branch design or specifying power supply sizing.
Integration / Installation Notes
The 6ES72141BG400XB0 mounts directly to a standard 35 mm DIN rail and requires a enclosure rated IP20 or better in typical industrial environments. Ethernet/RJ45 port supports programming via TIA Portal and integration into plant networks; the specific Ethernet protocol stack (Profinet, TCP/IP, or both) is not listed in the supplied fields. No display is onboard; operational status must be inferred from LEDs or monitored via software.
The relay output section provides galvanically isolated contacts, but the contact voltage and current ratings are not present in the supplied fields. For motor starter, contactor, or solenoid switching, confirm that relay ratings satisfy the load. Relay life expectancy at specific load conditions is not covered by the catalog entry and should be drawn from the datasheet.
No mounting cutout, terminal torque spec, or wire gauge guidance appears in the supplied fields.
Selection / Substitution Guidance
Substitution of the 6ES72141BG400XB0 with an alternate S7-1200 CPU must account for three dimensions present in the catalog entry:
- I/O count and type — the 14DI/10D relay count is fixed; alternates with different output technologies (solid-state, DC transistor, or pulse outputs) are not direct substitutes for relay-load switching applications.
- Power topology — AC/DC input version vs. DC/DC versions (see alternates below); confirm the available AC supply voltage matches the unit's input rating.
- Memory and expandability — this unit is non-expandable and carries 100 kB; alternates with larger memory or expansion bus capability address larger programs but introduce different form factors.
Substitution claims in the similarity field (e.g., 0.92, 0.79) reflect catalog metadata proximity only; they do not indicate functional interchangeability or verified performance equivalence.
Similar Catalog Parts
| MPN | Title | Similarity | Input Power | Outputs | Memory | Temp Range |
|---|---|---|---|---|---|---|
| 6ES72141BG400XB0 | CPU 1214C, AC/DC/RELAY, 14DI/10D | 1.00 | AC/DC | 10 Relay | 100kB | 20°C~60°C |
| 6ES72141HG400XB0 | CPU 1214C, DC/DC/RELAY, 14DI/10D | 0.92 | DC/DC | 10 Relay | 100kB | 20°C~60°C |
| 6ES72141AG400XB0 | CPU 1214C, AC/DC/SSR, 14DI/10D | 0.92 | AC/DC | 10 Solid State | 100kB | 20°C~60°C |
| 6ES72151AF400XB0 | CPU 1215 FC, DC/DC/DC, 14DI/10DO | 0.84 | DC/DC | 10 Digital | 150KB | 0°C~55°C |
Why Each Is Listed
- 6ES72141HG400XB0: Shares all visible electrical parameters except input power topology (DC instead of AC/DC). The DC/DC variant suits 24 VDC supply architectures common in DC control panels. Direct substitute only if the 24 VDC supply is available and the AC input variant is not required.
- 6ES72141AG400XB0: Matches I/O count and memory; uses solid-state outputs instead of relay contacts. Not a direct substitute for inductive or high-inrush AC loads where relay switching is required. Confirm load compatibility before substitution.
- 6ES72151AF400XB0: Shares the 14DI count and Ethernet interface but belongs to the CPU 1215 series with 150 KB memory, DC inputs, and DC transistor outputs. Different family, different output technology, wider temperature range.
Remaining alternates (6ES72151AG400XB0, 6ES72171AG400XB0, 6ES72151HF400XB0, 6AG12141BG405XB0, 6ES72111BE400XB0) carry similarity scores of 0.79 or lower and reflect the same S7-1200 or SIPLUS family; they are not listed in the comparison table because their I/O counts, output types, or series differ materially from the primary part.
FAQ
Q: What input voltage does the 6ES72141BG400XB0 accept? A: The catalog entry does not specify the AC input voltage range. Confirm against the Siemens S7-1200 system manual; typical S7-1200 AC variants accept 85–264 VAC.
Q: What is the relay contact rating for the 10 outputs? A: The supplied fields do not include relay contact voltage, current, or power ratings. The datasheet must be consulted before specifying loads such as contactors, solenoid valves, or indicator lamps.
Q: Can the 6ES72141BG400XB0 be expanded with additional I/O modules? A: The catalog entry lists the unit as non-expandable. If distributed I/O or additional channels are required, an alternate CPU from the S7-1200 family with an integrated expansion bus should be evaluated.