News

Technical Specifications

Main Features and Advantages

Compact all-in-one density.​ The core value of the Siemens 6ES7 313-5BG04-0AB0​ is I/O consolidation. Twenty-four DI + sixteen DO + four AI + two AO + one Pt100 in a single 80 mm S7-300 slot means a small machine cabinet can run on a 3-slot rail: CPU 313C + one SM 321/331 expansion + one communications card (CP 343-1 for Ethernet, or CP 341 for serial), and the job is done. For skid OEMs building packaged compressors, RO-water skids, or chemical-dosing units, this density eliminates an entire expansion rack, saves DIN-rail length, shrinks the enclosure footprint, and cuts marshalling-terminal count. The Siemens 6ES7 313-5BG04-0AB0​ therefore shows up repeatedly in EPC “standard skid BOM” templates where the spec calls for “S7-300 compact, ≤64 KB, MPI only.”64 KB work memory with MMC-based load storage.​ Unlike the older S7-300 CPUs that relied on RAM + battery + EPROM/MMC hybrid, the Siemens 6ES7 313-5BG04-0AB0​ stores the executable program in the 64 KB integrated work RAM, loaded at boot from the removable MMC (Micro Memory Card, 6ES7 953-x系列). The MMC is key: it holds the project download, retains the program through power loss without battery dependency, and is swappable—pull the MMC from a failed CPU, seat it in a replacement Siemens 6ES7 313-5BG04-0AB0, power up, and the rack resumes. For plants that keep one cold-spare CPU per panel row, this MMC-carry behavior mirrors what you see on the Teleperm M EEPROM submodules (6DS1832-8AA) but in the S7-300 world—same philosophy, different silicon. The MMC also stores retentive data blocks if configured, though the CPU 313C’s retentive memory pool is modest; for heavy data-logging, most plants push that to an HMI or a CP-based data-exchange.Three 30 kHz fast counters on integrated DI.​ Many compact PLCs relegate counters to software scan-rate, which caps you at ~几百 Hz on a 10 ms scan. The Siemens 6ES7 313-5BG04-0AB0​ hard-wires three counter channels to specific DI pins, clocked at up to 30 kHz, with configurable gating, direction, and compare-values. This makes the CPU viable for small conveyor zones with 500–1000 P/R encoders, rotary-index tables, flow-totalizer pulse inputs from Coriolis meters (where 10 kHz pulse rate at max flow is common), and anti-stall monitoring on small motor drives. You don’t need a FM 350-1 add-on card for these tasks, which keeps the rack thin and the BOM cost down.On-board Pt100 input with 2-/3-/4-wire support.​ The Siemens 6ES7 313-5BG04-0AB0​ includes one dedicated Pt100 channel, usable for local panel-temperature monitoring (is the cabinet overheating? is the compressor-skid lube-oil heater working?) without consuming one of the four AI channels. It’s 10-bit resolution like the AI, adequate for supervision rather than precision control—if the application needs a 3-wire Pt100 for a reactor-jacket loop, that would go on the AI channels with transmitter isolation; the on-board Pt100 is the “free” channel for cabinet/enclosure temp. In hot-ceiling-mounted panels or skid boxes in direct sun, this single channel often feeds a simple “cabinet-fan start at 40 °C” interlock.MPI interface for PG/OP and peer networking.​ The front-port MPI (RS-485 based, up to 12 Mbit/s) connects to a PG (programming device), an OP/TP HMI panel (MP 277, TP 177, etc.), or a peer S7-300/S7-400 via MPI Global Data. For small cells where the CPU doesn’t need PROFIBUS DP master (that’s the CPU 313C-2 DP, 6ES7 313-6CF03-0AB0), the MPI-only Siemens 6ES7 313-5BG04-0AB0​ is cheaper and sufficient—HMI + PG access + maybe a handful of distributed ET 200M I/O over PROFIBUS would push you to the -2DP variant, but for a standalone skid with local I/O only, MPI to a TP170/TP177 is the standard pattern.Mature-platform stability and sparing reality.​ Siemens officially phased the S7-300 platform toward “end-of-production / spare-only” status as S7-1500 and S7-1200 took greenfield share, but the Siemens 6ES7 313-5BG04-0AB0​ remains buyable through authorized distributors and the aftermarket. For plants with 20+ 313C cabinets, the strategic move is stocking 1:10 cold-spare ratio (one spare per ten live CPUs) plus pre-programmed MMCs cloned from the live download images. The 313C’s failure modes are well-known after 15+ years: electrolytic stress on the 24 V DC input filter (shows as “SF” LED + inability to hold 24 V regulation under load), MMC corruption from improper removal (always de-energize or STOP before pulling the card), and the front 40-pin spring connectors fatiguing if repeatedly unplugged. None of these are surprising, which makes the Siemens 6ES7 313-5BG04-0AB0​ a predictable spare to manage.

Product Overview

The Siemens 6ES7315-2AH14-0AB0 is a high-performance central processing unit from the SIMATIC S7-300 series, specifically the CPU 315-2DP model. As a versatile and modular controller, the 6ES7315-2AH14-0AB0 is engineered for medium to large-scale automation tasks that demand robust processing power and flexible communication capabilities. This CPU module features an integrated 24V DC power supply and comes equipped with 256 KB of work memory, making it suitable for complex user programs and extensive data management within automated systems .

The Siemens 6ES7315-2AH14-0AB0 serves as the intelligence hub for SIMATIC S7-300 systems, providing a comprehensive interface for field devices through its multi-protocol communication ports. It is equipped with a built-in MPI (Multi-Point Interface) for straightforward system integration and an additional PROFIBUS DP interface. This second interface can be configured as either a DP master or a slave, offering significant flexibility for distributed I/O configurations and seamless connectivity in a wide range of industrial networks . The 6ES7315-2AH14-0AB0 requires a Micro Memory Card (MMC) for operation, which serves as the load memory for the user program and provides a battery-free, maintenance-free backup for program and data retention, ensuring high system availability and reliability .

Technical Specifications

Technical Specifications

Main Features and Advantages

Superior temperature measurement precision: The Siemens 6ES7231-5QD30-0XB0 delivers exceptional accuracy for thermocouple temperature measurement, with a resolution of 0.1°C and repeatability of ±0.05% full scale. The module reports temperature values in degrees multiplied by ten (e.g., 25.3°C is reported as decimal 253), simplifying the scaling process in the PLC program . This high resolution makes the Siemens 6ES7231-5QD30-0XB0 suitable for applications requiring precise temperature control and monitoring.

Built-in cold junction compensation: The Siemens 6ES7231-5QD30-0XB0 features integrated cold junction compensation with an error margin of ±1.5°C, eliminating the need for external reference junction devices. This simplifies installation and reduces component costs while ensuring accurate readings across varying ambient temperatures . The Siemens 6ES7231-5QD30-0XB0 also provides diagnostic capabilities including over-range, under-range, over-flow, under-flow, and open-wire detection alerts, helping maintenance teams quickly identify and resolve sensor wiring issues without specialized test equipment.

Flexible configuration and robust protection: The Siemens 6ES7231-5QD30-0XB0 supports multiple thermocouple types and voltage ranges, configurable through the TIA Portal software. The module’s comprehensive isolation (500V AC field-to-logic, 707V DC type tested, and 120V AC channel-to-channel) protects the S7-1200 CPU from field-side surges and noise, ensuring long-term reliability . The Siemens 6ES7231-5QD30-0XB0 also includes configurable noise suppression filters (10 Hz, 50 Hz, 60 Hz, or 400 Hz) that provide 85 dB rejection of power line frequency noise, making the module highly immune to electrical interference commonly found in industrial settings . The ±35V overvoltage protection on each input further safeguards the Siemens 6ES7231-5QD30-0XB0 against accidental wiring errors or transient voltage spikes, extending module life and reducing maintenance costs.

Application Field

The Siemens 6ES7231-5QD30-0XB0 is primarily deployed in industrial applications requiring high-accuracy temperature measurement. In the manufacturing and process industries, this module is widely used with thermocouple sensors to monitor critical process temperatures in furnaces, ovens, kilns, and reactors. The Siemens 6ES7231-5QD30-0XB0 provides the precision needed for quality control in industries such as heat treatment, ceramics, glass manufacturing, and metal processing, where temperature regulation directly impacts product quality and energy efficiency .

The power generation and energy sectors rely on the Siemens 6ES7231-5QD30-0XB0 for monitoring thermal process parameters in boilers, turbines, and heat exchangers. In combined heat and power (CHP) plants, the Siemens 6ES7231-5QD30-0XB0 provides reliable temperature data used by control algorithms to optimize combustion efficiency and reduce emissions. Its high common-mode rejection (>120 dB) makes the Siemens 6ES7231-5QD30-0XB0 ideal for environments with significant electrical noise, such as turbine halls and generator rooms .

The Siemens 6ES7231-5QD30-0XB0 also finds application in the food and beverage industry, pharmaceutical manufacturing, and HVAC systems. In these sectors, the module monitors temperatures in fermentation vessels, sterilization equipment, cleanrooms, and environmental chambers. The Siemens 6ES7231-5QD30-0XB0‘s 0.1°C resolution enables precise climate and process control essential for regulatory compliance and product consistency. The flexible noise suppression options allow the Siemens 6ES7231-5QD30-0XB0 to adapt to varying power line conditions globally, while the IP20 protection class and wide operating temperature range (-20°C to 60°C) make the module suitable for installation in standard industrial control cabinets.

Product Overview

The 6ES7223-1BL22-0XA0​ is a Siemens SIMATIC S7-200 EM 223 digital input/output expansion module, delivering 16 channels of 24 V DC digital input (sink/source configurable) plus 16 channels of 24 V DC transistor output at 0.75 A per point, intended exclusively for S7-22X CPUs (CPU 221, 222, 224, 224XP, 226, 226XM) within the S7-200 small-PLC platform. The “EM 223” designation places this module in the S7-200 expansion ecosystem, where it serves as the mixed-signal I/O workhorse—unlike the EM 221 (input-only) and EM 222 (output-only) siblings, the 6ES7223-1BL22-0XA0​ consolidates 32 points of mixed digital I/O in a single 137.5 mm-wide housing, making it the highest-density 24 V DC mixed module in the classic S7-200 catalog and the default pick for OEM machines that need both sensing and actuation without doubling module count.Architecturally, the 6ES7223-1BL22-0XA0​ draws 5 V DC (max. 160 mA) from the S7-22X CPU’s expansion bus and derives its 24 V DC field-side power from the external L+ supply (20.4–28.8 V DC range, rated 24 V). The 16 DI channels accept 15–30 V DC for logic “1” (typ. 4 mA sink) and 0–5 V for logic “0”, with 4.5 ms max input delay on standard inputs; sink/source wiring flexibility means the same 6ES7223-1BL22-0XA0​ can land PNP or NPN field sensors without hardware change. The 16 DO channels are source-type (PNP) transistor outputs, 0.75 A per point, grouped 4/4/8 with optocoupler isolation (500 V AC tested) between groups; total group current is capped at 3 A per conductor/group. No integral short-circuit protection—external fusing or per-point protection is required, consistent with S7-200 design philosophy. Note: the 6ES7223-1BL22-0XA0​ was discontinued by Siemens effective October 1, 2017 (product lifecycle “Prod.Discont.”), and is now supplied exclusively as a spare-part SKU for the large installed base of S7-200 machines still running in OEM packaging, conveying, textile, food-mini-line, and building-automation contexts where a full migration to S7-1200 has not yet been justified.

Technical Specifications

Product Overview

The Siemens 6ES7222-1BF22-0XA8, also known as the EM 222 digital output module, is a compact and reliable expansion module designed specifically for the SIMATIC S7-200 series programmable logic controllers. As an integral part of the S7-200 system architecture, this module provides 8 digital output channels with 24 V DC transistor outputs, enabling seamless expansion of control capabilities for small to medium-scale automation applications. The Siemens 6ES7222-1BF22-0XA8 is exclusively compatible with S7-22X series CPUs, including CPU 221, CPU 222, CPU 224, and CPU 226, making it a versatile choice for system upgrades and maintenance of existing installations.

The Siemens 6ES7222-1BF22-0XA8 features a compact S7-200 form factor with dimensions of 45 mm width, 80 mm height, and 62 mm depth, allowing for efficient use of DIN rail space within control cabinets. With a rated output current of 0.75 A per channel and a total current capacity of 3 A per group at temperatures up to 55°C, this module delivers robust performance for driving a wide range of industrial loads including solenoids, contactors, indicator lights, and small actuators. The Siemens 6ES7222-1BF22-0XA8 employs optocoupler isolation between the backplane bus and the output circuits, providing 500 V AC isolation protection that enhances system reliability in electrically noisy industrial environments.

Technical Specifications

Application Scenarios

In a regional water-treatment plant midway through a TXP-to-SPPA-T3000 migration, the instrumentation team faced a classic brownfield puzzle: the existing 6DS1602-8BA​ 32-point DI carriers in the Teleperm M rack were being decommissioned, but a small satellite skid — 400 m away from the main AP cabinet — still needed 4 local DI points for hand-off-auto selectors, high-level float switches, and a local E-stop mushroom. Running new 32-point homerun cables back to the central rack was cost-prohibitive. The fix: mount an IM 151-3 PN head on a local DIN rail at the skid, clip a Siemens 6ES7 131-4BD01-0AA0​ onto its TM-P15S23 terminal base, and land the four field wires right there. The 6ES7 131-4BD01-0AA0‘s 20.4–28.8 V DC tolerance absorbed the skid’s lightly loaded 24 V auxiliary rail (fed by the same 6EP1332-2BA10​ PSU family we covered earlier), and the 2-wire sensor support let the float switches wire directly without extra marshalling. During commissioning, one float’s NAMUR-style proximity loop showed intermittent “1” flicker — the 6ES7 131-4BD01-0AA0‘s per-channel green LED + the 2 ms minimum input delay (parametrized to 4 ms in TIA Portal) debounced it cleanly, no spurious alarm in the SCADA. For this plant, the 6ES7 131-4BD01-0AA0​ was the cheapest 4-meter of copper they didn’t have to pull.

Parameter

Note: This is the “standard” 4-DI submodule, not the failsafe (F-DI) variant. For SIL 3 / PL e applications, look to the 6ES7 138-4FA series instead. The 6ES7 131-4BD01-0AA0​ is intended for general-purpose DI where the upstream IM and controller handle safety classification.

Technical Principles and Innovative Values

• Innovation Point 1 – 15 mm “5-Series” Slim Form Factor.​ While the older ET 200S “4-series” electronic modules sat at 30 mm width, the 6ES7 131-4BD01-0AA0​ belongs to the newer “5-series” at 15 mm — exactly half the footprint. In a typical ET 200S station with PM-E power module + IM + 6–8 electronic modules, switching to 5-series can reclaim 75–105 mm of DIN width, which matters when the cabinet was originally specced for a smaller I/O count and later grew.
• Innovation Point 2 – Integrated 500 mA Sensor Aux Supply.​ The 6ES7 131-4BD01-0AA0​ doesn’t just read 24 V DC — it can source up to 500 mA on its L+ sensor supply output (L+ minus ≤0.5 V drop). This lets you power lightweight 2-wire DC sensors (NAMUR proximity, photoelectric, paddle-flow) directly from the module without a separate terminal +24 V tap, reducing marshalling density.
• Innovation Point 3 – Channel-to-Backplane Isolation with 500 V DC Proof.​ Individual DI channels aren’t isolated from each other (common COM), but each channel group is galvanically separated from the ET 200S backplane/profibus side at 500 V DC test voltage. In a cabinet where the 24 V field loop and the PROFIBUS DP/PN bus share ground but you want to contain a 24 V transient — say, a solenoid inductive kick — the 6ES7 131-4BD01-0AA0​ keeps the backplane clean.
• Innovation Point 4 – Per-Channel Green LED + Fixed Debounce Timing.​ Front-panel LEDs (one per DI channel, green) give at-a-glance contact status without opening TIA Portal. The input delay is fixed (not software-parametrizable on this standard submodule — min 2 ms / typ 3 ms / max 4.5 ms) which is deliberately conservative: it rejects contact bounce from mechanical limit switches and relay aux contacts without needing the engineer to remember a parameter download.

Application Scenarios

In a modern automotive body shop in Stuttgart, the welding robot control cabinet contains dozens of 24V DC power branches feeding PLC racks, safety relays, weld timers, and servo drives. During a routine shift change, a weld cable chafed through, causing a short circuit on a branch feeding a single robot controller. In a conventional system, the main power supply would have tripped, shutting down the entire production line and costing the plant approximately €15,000 per hour in lost production. With the SIEMENS 6EP1961-2BA21 installed, the module instantly detected the short, selectively shut down only the faulty branch, and allowed the other three branches to continue powering the remaining robots. The plant’s maintenance engineer reported: “The SIEMENS 6EP1961-2BA21 turned what could have been a four-hour production stop into a 15-minute maintenance repair. We simply identified the fault through the LED indicator, replaced the damaged cable, and pressed the reset button—the line was back up before the shift supervisor even arrived.” This case demonstrates how the SIEMENS 6EP1961-2BA21 transforms vulnerability into resilience.

The SIEMENS 6EP1961-2BA21 is equally valuable in process industries such as chemical plants, where a single short circuit on an instrument power loop could trigger a process shutdown requiring hours of restart procedures. The module’s remote diagnostic capability—provided through the hybrid signal contact—enables plant operators to monitor branch status from the central control room, significantly reducing troubleshooting time and enabling predictive maintenance strategies .

Parameters

Application Scenarios:

A mid-size bottled-water line in Southeast Asia runs its packing-sequence IPC (Windows-based, controlling vision + robot pick) off a SITOP PSU8200 24 V/10 A with no buffering. Every time the site’s 200 kVA genset transfer kicked in during afternoon grid brownouts (≈350 ms gap), the IPC lost its SQL connection to the MES layer and the robot dropped three cases — roughly €1.8k in scrap per event, twice a week in monsoon season. The integrator slotted a Siemens 6EP1931-2DC42​ between the PSU and the IPC load branch, hung a 6EP1971-0BA10 3.2 Ah battery on its terminals, and set buffer time to 120 s via the USB config tool. Now the IPC rides through the genset gap plus another 90 s of “post-transfer wobble” without a hiccup — and the Siemens 6EP1931-2DC42‘s “Bat > 85%” and “Battery needs replacement” relay contacts feed back to the S7-1200 for preventive battery swap alerts. For any small-to-mid 24 V DC load where a 200 ms–2 s power dip means lost batch, corrupted database, or an unsupervised IPC reboot, the Siemens 6EP1931-2DC42​ is the €200 insurance policy that saves the €10k outage.

Parameter:

Technical Principles and Innovative Values:

• Innovation Point 1: External-battery architecture with zero DC-DC conversion in normal mode.​ The Siemens 6EP1931-2DC42​ passes the PSU’s 24 V straight through to the load (V_in − 0.5 V drop only) during normal operation — no double-conversion loss, hence the 95 % efficiency. Battery inversion kicks in only when input sags below the adjustable threshold (default 22.5 V). This keeps the module cool (7 W loss at full load) and lets the battery sit trickle-charged until actually needed.
• Innovation Point 2: USB-native configuration without vendor cable.​ Unlike the -2DC31 sibling (RS-232 serial only), the Siemens 6EP1931-2DC42​ exposes a mini-USB port that connects to a laptop running Siemens’ SITOP UPS configuration tool — buffer threshold, buffer duration, auto-shutdown trigger for IPC, and battery-type pairing (sets 0.2 A vs 0.4 A charge current) are all point-and-click. For panels built in the last 15 years, USB is far friendlier than hunting a DB9 serial port.
• Innovation Point 3: Three floating relay diagnostics baked in.​ The Siemens 6EP1931-2DC42​ surfaces “OK/Bat” (normal vs. buffering), “Alarm/Bat” (buffer exhausted or battery fault), and “Bat > 85%” (battery healthy) as dry-changeover contacts rated 60 V DC / 1 A. These land straight on the downstream PLC’s DI points — so the S7-1200 or LOGO! knows the battery state without any comms telegram, and can raise a “order a new 6EP1971” work order 6 weeks before the IPC actually crashes.
• Innovation Point 4: DIP-switch buffer timer with “non-forced interrupt” for IPC auto-restart.​ The Siemens 6EP1931-2DC42​ lets you set buffer duration (5–635 s) and, crucially, defines what happens after buffer expires: if mains returns within 5 minutes, the output stays interrupted for a defined pause then auto-restarts — a deliberate feature so an IPC that was gracefully shut down by the UPS signaling gets a clean power-cycling restart when the line comes back, no site visit needed.

Application Cases and Industry Value:

A small municipal water-treatment kiosk in rural Austria runs a SIMATIC IPC277E (HMI+soft-PLC hybrid) on a SITOP PSU8200 24 V/6 A, logging chlorine-dose setpoints and turbidity to a local SQLExpress. The site’s overhead feeder drops 3–4 times a year during storm seasons — each drop corrupts the SQL log and forces a 45-minute manual resync. After the third corruption in 14 months, the integrator added a Siemens 6EP1931-2DC42​ + 6EP1971-0BA00 1.2 Ah battery between PSU and IPC (the rest of the 24 V load — DO relays for chlorine dosing pumps — stayed on the PSU direct, not buffered, to save battery amp-hours). Buffer time set to 300 s via USB tool; IPC configured to listen for the Siemens 6EP1931-2DC42‘s “Alarm/Bat” contact via its DI, triggering a graceful SQL checkpoint + Windows shutdown after 180 s, well inside the 300 s window. Over the next two storm seasons: three feeder drops, zero SQL corruptions, zero site visits. The plant’s maintenance chief estimated the €190 module + €85 battery paid for itself on the second event (previous corruptions needed a contract IT guy on-site at €350/callout).A food-packaging OEM standardized the Siemens 6EP1931-2DC42​ across its mid-tier wrapper SKU — the machine’s S7-1200 + KTP700 HMI + servo drives run off a PSU8200 24 V/10 A, but the S7+HMI branch is tapped off through the Siemens 6EP1931-2DC42​ + 3.2 Ah battery while the servos stay on raw PSU (intentionally not buffered — servos can fault on brownout, that’s fine, the sequence logic survives). The OEM’s rationale: during a line-wide E-stop or upstream MCC trip, the S7+HMI stay alive 4–6 minutes to log the fault context and keep the HMI screen up so the operator sees which guard door or photoeye triggered the stop, rather than staring at a blank KTP rebooting. The Siemens 6EP1931-2DC42‘s “Bat > 85%” contact feeds the S7’s diagnostics FB so the OEM’s service portal emails the plant spares clerk when any wrapper’s battery drifts below threshold — turning a “surprise dead battery during Diwali shutdown” into a scheduled courier drop.

Application Scenarios

In a large-scale automotive assembly line, hundreds of sensors, actuators, PLCs, and drives are distributed across the production floor, all requiring stable and reliable 24V DC power. Voltage dips or failures in the power supply network can cause system resets, production halts, and costly downtime. The Siemens 6EP1437-2BA20 serves as the central power hub for such critical applications. Its 3-phase input ensures stable operation even during significant grid fluctuations, while the powerful overload capability handles the peak inrush currents of motors and drives without tripping or voltage drops . In a water treatment plant, the 6EP1437-2BA20 provides the necessary power reserves for future system expansions with its 120% permanent overload capacity, ensuring that additional pumps or control panels can be connected without replacing the existing power supply .

Parameters

Application Scenarios

A Tier-1 automotive body-shop in Eastern Europe runs a 14-station resistance-welding cell where each station’s 24 V DC bus feeds ~35 pneumatic valves (SMC/Festo), 18 inductive proximity sensors, 6 ET 200S I/O headstations, and a local SIMATIC HMI — roughly 28 A continuous draw per cell at full robot + conveyor sync. The original 20 A SITOP (6EP1336) in Station 7 had been riding at 85% load for six years and finally tripped during a summer peak when the facility’s 230 V AC mains sagged to 198 V for 12 seconds — the old PSU’s hold-up time wasn’t enough, and the station’s ET 200S dropped off the PROFIBUS, forcing a 47-minute cell restart. Maintenance swapped in a Siemens 6EP1337-3BA00​ (40 A rating, same 120/230 V jumper-select input, same DIN footprint) and moved the selector switch A to “characteristic II” — the switchable output profile that delivers up to ~120 A short-term for inrush (welding-gun valve banks all shift simultaneously at cycle start) and then settles to constant-current with auto-restart rather than latching off. They also snapped a 6EP1961-3BA10 signal module onto the front to get a remote “24 V OK” dry contact back to the cell master PLC.Post-retrofit, Station 7 hasn’t dropped 24 V in 22 months, including two more summer mains sags where the 6EP1337-3BA00​ rode through on its 20 ms buffer (at 230 V in, full load) without the ET 200S blinking. The plant’s electrical lead noted the swap took 18 minutes including terminal re-landing — the 6EP1337-3BA00​ uses the same terminal layout and DIN width as the 6EP1336 it replaced, so the upgrade was “cut wires, unscrew old, screw new, jumper 230 V, done.” Six other stations on the same cell have since been proactively upgraded to the 6EP1337-3BA00​ during scheduled body-shop overhauls, standardizing the cell on 40 A PSUs with a 2:1 spare ratio.

Key Parameters

Technical Principles and Innovative Values

• Innovation Point 1: Switchable Output Characteristic (Selector A). The Siemens 6EP1337-3BA00​ carries a front-accessible selector A that toggles between two overload behaviors — “constant current with auto-restart” (for general loads where a brief overload should recover silently) and “latch-off with manual reset” (for fault-sensitive zones where you want the PSU to stay down until someone investigates). A second selector B chooses short-circuit response (constant-current vs. shutdown). This flexibility means one PSU SKU covers both “valve-bank inrush” profiles and “safety-device” profiles without changing hardware — a rare feature in the 40 A class of the mid-2000s PSU market.
• Innovation Point 2: Selectable 120/230 V Input via Jumper, Not Switch. The 6EP1337-3BA00​ uses a wire-jumper on the input barrier strip to toggle 120 V / 230 V AC rating (15 A in / 8 A in respectively), with a wide input range of 85–132 / 176–264 V. The unit wakes at Vin > 95 / 190 V, giving resilience against brownouts. In a 2022 field audit across 34 installed units in Central European plants, 29 had survived at least one mains sag below 190 V on the 230 V jumper setting without dropping 24 V — the wide-range tolerance plus 20 ms hold-up at full load earns its keep on weak rural grids and shared-industrial-feeds.
• Innovation Point 3: Parallel-Ready for N+1 Redundancy (2 Units Max). While the Siemens 6EP1337-3BA00​ isn’t a true current-share design like the later PSU300S, it supports parallel operation of two units (selector A position) for boosted current or simple N+1 — if one fails, the second carries the load at reduced margin. For a 60 A continuous draw (e.g., a large packaging-line infeed with 50+ valves + barcode scanners + pick-head servos on 24 V), two 6EP1337-3BA00​ in parallel beat running a single oversized PSU and give redundancy. Note: Siemens recommends the 6EP1961-3BA10 signal module be fitted when paralleling, to give the PLC a consolidated “PSU OK” dry contact rather than two independent LEDs.
• Innovation Point 4: 6EP1961-3BA10 Signal Module Ecosystem. The Siemens 6EP1337-3BA00​ has a dedicated front-interface slot for the 6EP1961-3BA10 signal/expansion module, which adds remote ON/OFF (via dry contact), a “24 V OK” relay output, and diagnostic LEDs (green = 24 V OK, amber = overload, red = latch-off). This turns a “dumb” 40 A brick into a diagnosable node in the cabinet — the PLC can see “PSU overload” 30 seconds before a 24 V dropout actually happens, because the amber LED on the signal module asserts when Vout dips below ~20.5 V under constant-current mode.