Schneider Electric TM241CE40T — Modicon M241 PLC Buyer Review

By Abdullah Zahid
16 min read
Schneider Electric TM241CE40T Modicon M241 40-point PLC with Ethernet and PNP transistor outputs for machine control

Schneider Electric TM241CE40T Logic Controller, Modicon M241, 40 IO, Transistor, PNP, Ethernet — Specifications, Review & Buying Guide

When a controls engineer or machine builder reaches this page, they are typically in one of two places: they have already spec'd 24 discrete inputs and 16 transistor outputs and are confirming the TM241CE40T is the correct part before raising a purchase order, or they are evaluating whether the Modicon M241 family fits their compact panel application. Either way, the decision usually comes down to three things — I/O count, Ethernet capability, and whether the built-in fast I/O (up to 100 kHz in PLS mode, 200 kHz in high-speed counting) eliminates the need for external pulse hardware. The Schneider Electric TM241CE40T addresses all three in a 90 x 95 x 190 mm DIN rail package running on 24 V DC.

If you have already confirmed this is the right part, check current pricing and availability at LeadTime.ca — ships worldwide.

Who Should Buy the TM241CE40T — and Who Shouldn't

The TM241CE40T is the right controller for machine builders and system integrators whose application maps cleanly to its fixed I/O architecture and Ethernet networking requirement. This is a purchase-ready choice if all of the following are true:

  • Your machine requires exactly 24 discrete inputs and 16 transistor outputs (PNP source type), totalling 40 I/O points
  • A stable 24 V DC supply within the 20.4–28.8 V range is available, with capacity for a ≤50 A inrush spike at startup
  • On-board Ethernet (Modbus TCP at 16 ms cycle, Ethernet-IP at 64 ms cycle) is required for network integration or SCADA connectivity
  • Your application involves high-speed sensing or motion pulse output — fast inputs operate to 200 kHz HSC and fast outputs to 100 kHz PLS mode
  • Panel space constrains you to a 90 x 95 x 190 mm DIN rail footprint, and future expansion can be handled by up to 7 local or 14 remote I/O modules
  • Your programming team works in IEC 61131-3 environments (Ladder Logic, Structured Text, Function Block Diagram) using SoMachine or a compatible IDE

If your application requires analog I/O (thermocouples, 4–20 mA transmitters), select a Modicon M241 variant with integrated analog capability. If you need more than 40 discrete I/O points without expansion modules, the TM241CE60T at 60 I/O is the direct upgrade path. If Ethernet is not required, the TM221CE24R is a smaller, lower-cost entry point.

On this page:

What the TM241CE40T Actually Does in a Machine Control System

The Schneider Electric TM241CE40T is a compact programmable logic controller in the Modicon M241 family, designed to serve as the central logic processor in discrete machine automation. It accepts 24 V DC power within the 20.4–28.8 V range and executes programmed IEC 61131-3 logic to manage its 24 discrete inputs and 16 transistor outputs in real time. The 8 MB program memory and 64 MB system RAM give it capacity well beyond what most 40-point applications require, and the on-board real-time clock supports timestamped event logging and scheduled logic execution without additional hardware.

The detail that sets this controller apart from basic micro-PLCs in the same I/O class is its integrated fast I/O capability. Eight of the 24 inputs are fast-response channels capable of high-speed counting to 200 kHz, and four of the 16 transistor outputs support pulse train generation (PLS mode) to 100 kHz and PWM to 20 kHz. This eliminates the need for a dedicated external pulse generator card or separate high-speed counter module — two items that routinely add cost and installation complexity to packaging and motion-adjacent applications. The on-board Ethernet port (RJ45) with Modbus TCP and Ethernet-IP support completes the picture: this controller connects directly to a plant network, SCADA system, or peer controller without any additional communication module on the bill of materials.

Physical integration is straightforward. The unit mounts to DIN rail TH35-15 or TH35-7.5 per IEC 60715, or directly to a panel surface using a fixing kit. Removable screw terminals at 5.08 mm pitch simplify maintenance and replacement. At 0.62 kg, it does not require special rail reinforcement in most panels. The operating temperature range of -10 to 50°C (vertical mount) or -10 to 55°C (horizontal) and 10–95% relative humidity tolerance make it suitable for most industrial enclosure environments, including those near process heat or cooling systems. Marine-duty deployments are supported where LR, ABS, DNV, and GL certifications under IACS E10 are required.

Where the TM241CE40T Sits in Your System Architecture

The TM241CE40T acts as the primary execution node between your automation network and field devices — it receives sensor data, runs control logic, and drives outputs, all while reporting status over Ethernet to supervisory systems or peer controllers.

  • Plant network or SCADA system connects via Ethernet (Modbus TCP or Ethernet-IP) to the TM241CE40T RJ45 port
  • The TM241CE40T executes IEC 61131-3 ladder or structured text logic from its 8 MB program flash, with 64 MB RAM for runtime data
  • 24 discrete sensor signals (photoelectric, proximity, pressure switches) wire directly to the 24 input terminals; 8 of these are fast-response channels for encoder or high-frequency pulse signals
  • 16 PNP transistor outputs drive solenoids, relays, valve actuators, and stepper pulse trains; 4 fast output channels (Q0–Q3) handle pulse generation up to 100 kHz for motion-adjacent loads
  • Up to 7 local expansion modules connect directly to the controller for additional I/O; up to 14 remote modules extend the architecture over Ethernet where field devices are distributed

Typical Applications: Where This Controller Gets Deployed

Packaging and bottling lines are the most common deployment environment. A bottling line typically presents exactly the kind of I/O mix the TM241CE40T is built for: photoelectric sensors, level detectors, and pressure switches on the input side; solenoid valves, conveyor gate actuators, and filling head controls on the output side. The fast input channels handle product-present detection at high belt speeds without introducing latency that would cause fill errors.

Automated conveyor merge and sortation systems benefit specifically from the 200 kHz high-speed counter (HSC) capability on the fast inputs. Encoder feedback from a belt drive or rotary position sensor feeds directly into the fast input channels, allowing the TM241CE40T to track product position and synchronize downstream diverters with sub-millisecond timing accuracy — without a separate position module.

Material handling equipment — lift tables, palletizers, and gantry systems — uses the controller's combination of standard discrete I/O for safety interlocks and limit switches, plus fast outputs for stepper or pulse-direction drive signals. The 100 kHz PLS mode on Q0–Q3 outputs means step pulses for a microstepping drive can be generated natively from the controller without external pulse hardware.

Retrofit applications are a strong fit. The compact 90 x 95 x 190 mm form factor fits inside many existing 24 V DC control cabinets, the removable 5.08 mm screw terminals preserve existing wiring harnesses, and the IEC 61131-3 programming environment allows engineers to port ladder logic from legacy controllers with minimal rework. Machine builders replacing aging relay logic or discontinued micro-PLCs use the TM241CE40T to bring Ethernet networking into panels that previously had none.

Marine and offshore automation is a less common but verified deployment area. The IACS E10 certification and approvals from LR (Lloyd's Register), ABS (American Bureau of Shipping), DNV (Det Norske Veritas), and GL (Germanischer Lloyd) qualify the controller for bilge pump control, ballast management logic, and thruster sequencing on oceangoing vessels and offshore platforms, provided the unit is specified with those certifications at the point of order.

Application Typical Deployment
Bottling and filling lines 24 photoelectric/level inputs + 16 solenoid/valve outputs; fast inputs for product detection at line speed
Conveyor sortation systems 200 kHz HSC fast inputs for encoder feedback; standard outputs for diverter and gate solenoids
Material handling and palletizing Standard discrete I/O for interlocks; fast outputs (100 kHz PLS) for stepper drive pulse trains
Packaging machinery PWM (20 kHz) fast outputs for servo drive control; Ethernet-IP for machine network integration
Marine pump and ballast control IACS E10 / LR / ABS / DNV certified unit in marine enclosure; bilge and ballast sequencing logic
Relay logic retrofit Drop-in to existing 24 V DC cabinet; Ethernet added without additional comms module

Key Specifications and Variant Comparison

Parameter Value
Supply Voltage Range 20.4–28.8 V DC (rated 24 V DC)
Inrush Current ≤50 A
Discrete Inputs 24 total (8 fast-response)
Discrete Outputs 16 transistor PNP (4 fast); 0.5 A standard / 0.1 A fast
Fast I/O Frequencies 200 kHz HSC counting / 100 kHz PLS / 20 kHz PWM / 1 kHz standard
Program Memory / RAM 8 MB program flash / 64 MB system RAM
Communications Ethernet RJ45 (Modbus TCP 16 ms, Ethernet-IP 64 ms), USB, SD card
Power Consumption 32.6–40.4 W typical (full I/O load)
Dimensions (H x D x W) 90 x 95 x 190 mm / 0.62 kg
Operating Temperature -10 to 50°C (vertical) / -10 to 55°C (horizontal)

Full technical specifications are available on the product page at LeadTime.ca.

TM241CE40T vs. Alternative Models

Model I/O Configuration Ethernet Max Frequency Typical Lead Time Notes
TM241CE40T (Schneider Electric) 24 in / 16 out Yes 100 kHz PLS / 200 kHz HSC 1–4 weeks Baseline 40-point compact; this model
TM241CE60T (Schneider Electric) 36 in / 24 out Yes 100 kHz PLS / 200 kHz HSC 2–6 weeks Direct upgrade when >40 I/O needed; same Modicon M241 family
TM221CE24R (Schneider Electric) 14 in / 10 out No 1 kHz 1–3 weeks Budget entry-level; no Ethernet, no fast I/O
S7-1200 CPU 1214C (Siemens) 14 in / 10 out Optional 10 kHz 2–8 weeks Comparable compact class; TIA Portal IDE; lower native I/O count
CompactLogix L16ER (Allen-Bradley) 16 point Yes 100 kHz 2–4 weeks Premium pricing; tighter EtherNet-IP ecosystem integration

If your application I/O count has grown beyond 40 points and expansion modules are not in the project scope, the TM241CE60T is the direct next step — check current availability and confirm the right variant at LeadTime.ca.

Expert Verdict: Is the TM241CE40T Worth Specifying?

The TM241CE40T occupies a well-defined and genuinely useful position in the compact PLC market: it delivers integrated Ethernet networking, fast I/O to 100 kHz PLS and 200 kHz HSC, and 40 discrete I/O points in a single 0.62 kg DIN rail unit without requiring any additional communication or pulse-generator modules. For automation engineers specifying controls for packaging machinery, conveyor systems, or material handling equipment where the sensor and actuator count maps cleanly to 24 inputs and 16 outputs, this controller removes significant cost and complexity from the bill of materials. System integrators deploying it across multiple OEM machine builds benefit from a consistent programming environment (IEC 61131-3 via SoMachine), a known expansion architecture (7 local plus 14 remote modules), and marine-grade certifications available for projects that require LR, ABS, DNV, or GL compliance.

The limits are real and worth stating plainly. The fixed 24-in / 16-out architecture demands precise upfront I/O planning — there is no slack built in, and adding even a handful of sensors beyond 40 points triggers either an expansion module order (adding 1–2 weeks to the schedule) or a model change to the TM241CE60T. The controller carries no native analog I/O; applications involving thermocouples, pressure transmitters, or 4–20 mA process signals require a different Modicon M241 variant with integrated analog capability. The PNP transistor output type (source logic) is correct for most modern industrial sensors and actuators, but engineers converting from relay-output PLCs or NPN-sink installations need to verify wiring polarity before committing a wiring harness.

From a procurement standpoint, the TM241CE40T is a stocked item at authorized industrial distributors worldwide, with typical lead times of 1–4 weeks in North America. Buying through a specialist automation distributor rather than a general marketplace channel matters here — not because the part is exotic, but because the associated documentation, certificate of compliance for marine certification, and expansion module sourcing are all easier to coordinate through a single technical contact. View current pricing and availability on the LeadTime.ca product page, where the team can confirm stock, lead time, and any bundling options for expansion modules or accessories.

For volume pricing, project-level lead time commitments, or technical questions before committing to a build, contact the LeadTime.ca team directly — we ship worldwide.

What Engineers Need to Know Before Ordering the TM241CE40T

Because the TM241CE40T is deployed almost exclusively in closed OEM machine builds, systems integration projects, and industrial retrofit programs, public forum discussion of this specific model is sparse by design. Engineers do not typically publish their Modicon M241 configuration choices to hobbyist communities — these controllers go into production machines under NDAs and customer project agreements. That absence of forum chatter is not a signal of risk; it reflects the controller's positioning as a professional B2B product rather than a maker-community platform.

What that reality means for a buyer at the ordering stage is that the most reliable source of pre-purchase intelligence is not Reddit or a public forum thread — it is an authoritative conversation with a specialist distributor who has processed orders for this model across multiple project types. The ordering mistakes that surface in industrial distribution are consistent and preventable. The most common: specifying the TM241CE40T on a project where the I/O count is estimated rather than confirmed, and discovering after delivery that the application actually needs 44 or 48 points — which then requires an expansion module, a revised panel layout, and an additional lead time cycle. The second most common: receiving a PNP transistor output controller on a panel designed around NPN sink logic, with no time in the project schedule to rework the wiring harness. Both mistakes are avoidable with a 15-minute pre-order technical review.

The third area where specialist advice pays for itself is certification. The TM241CE40T is available with marine certifications (LR, ABS, DNV, GL under IACS E10), but these must be confirmed at the time of order — not assumed to be included with every unit. If your project is headed to a vessel or offshore platform and the certificate of compliance is not in the box, the commissioning process stops. A distributor who understands what you are building can flag this before the purchase order is raised, not after the unit arrives at the dock. When community feedback is limited and the cost of a wrong-part order is high, the right move is to bring in a specialist before clicking buy — and that is exactly the conversation LeadTime.ca is set up to have.

Wiring and Installation Overview

The TM241CE40T uses removable screw terminals at 5.08 mm pitch for all supply, input, and output connections, which simplifies field replacement. The following points cover the critical requirements engineers should verify before and during installation. Full wiring procedures are detailed in the Schneider Electric TM241CE40T installation manual and SoMachine documentation.

  • Supply wiring: Connect a stable 24 V DC source within the 20.4–28.8 V range; the power supply must handle ≤50 A inrush at startup — industrial DIN rail power supplies with inrush ratings are required; consumer-grade supplies are not suitable
  • Discrete input wiring: Sensor signals wire to I0–I23 terminals; logic 1 state requires ≥15 V per IEC 61131-2 Type 1; fast input channels (I0–I7) require shielded cable if the run exceeds 10 m, with shield terminated at controller frame ground only
  • Transistor output wiring: Outputs Q0–Q15 are PNP source type — load positive connects to +24 V and load negative connects to the output terminal; maximum 0.5 A per standard channel, 0.1 A per fast channel (Q0–Q3), 2 A maximum per output common
  • Fast output cable limits: Q0–Q3 fast outputs (100 kHz PLS, 20 kHz PWM) require shielded cable if the run exceeds 3 m; terminate shield at one end only to prevent ground loops
  • External protection required: An external fused disconnect or 50 A circuit breaker on the 24 V DC supply input is mandatory per UL 508 and CSA C22.2 No. 142; the controller's built-in short-circuit protection (auto-reset at 10 ms standard / 12 s fast output) is not a substitute for external overcurrent protection

Expansion Modules and System Growth

The TM241CE40T supports modular I/O expansion within the Modicon M241 ecosystem — both locally adjacent to the controller and remotely over Ethernet. If your application is at or near 40 I/O points today but may grow, confirm the expansion architecture before finalizing the panel design.

  • Local expansion: Up to 7 I/O modules connect directly to the controller on the DIN rail, each adding 8–16 I/O points depending on module type
  • Remote expansion: Up to 14 remote I/O modules extend the architecture over Ethernet to field junction boxes or distributed panels
  • Expansion module types available within the Modicon M241 family include discrete input, discrete output, and analog I/O modules — analog capability is added via expansion, not native to the TM241CE40T itself
  • SD card slot: Supports program storage and data logging; useful for machine variants or parameter sets that need to be managed at the machine level without a laptop
  • USB port: Provides direct programming access and firmware update capability without requiring Ethernet network access — useful during commissioning in isolated panels

Wrong-Part Prevention Checklist

Before placing your order for the TM241CE40T, work through the following checklist. These are the most common points of mismatch between the controller and the application — each one is worth confirming in writing before the purchase order is raised.

  1. Confirm your machine / application needs exactly 24 discrete inputs + 16 outputs (not 40 analog, not 60+ I/O)
  2. Verify power supply is stable 24 V DC, 20.4–28.8 V range, with inrush capacity for 50 A spike
  3. Confirm Ethernet port is required (not just serial or standalone control)
  4. Check that fast I/O speed (100 kHz PLS mode, 20 kHz PWM, 200 kHz counting) matches sensor / actuator interface
  5. Verify DIN rail mounting space (90 x 95 x 190 mm) or confirm panel mount kit availability
  6. Confirm programming team knows IEC 61131-3 Ladder Logic or SoMachine environment
  7. Check that I/O expansion (7 local or 14 remote modules) is sufficient for future growth
  8. Confirm no marine / hazardous duty required unless LR/ABS/DNV certifications are already in scope

If any item on this list surfaces a mismatch, contact LeadTime.ca before ordering — the team can confirm the correct variant or identify the right expansion module to complete your configuration.

Frequently Asked Questions

Does the TM241CE40T include analog I/O, or do I need a separate module?

The TM241CE40T has no native analog I/O — all 40 points are discrete. If your application requires analog signals such as 4–20 mA transmitters or thermocouple inputs, you will need to add an analog I/O expansion module within the Modicon M241 ecosystem, or select a different Modicon M241 variant that includes integrated analog capability. Do not order the TM241CE40T assuming analog is included.

What happens to the fast outputs if a short circuit occurs — do they shut down permanently or reset automatically?

Short-circuit protection on the TM241CE40T is automatic-reset for both output types. Standard outputs (Q4–Q15) reset after 10 ms; fast outputs (Q0–Q3) reset after 12 s. This means a transient short will not require manual intervention, but the 12-second reset delay on fast output channels can mask intermittent wiring faults. An external fused disconnect on the 24 V DC supply is required per UL 508 regardless — the internal protection does not replace it.

Can I run the TM241CE40T on Ethernet-IP and Modbus TCP simultaneously, or is it one at a time?

The TM241CE40T has a single Ethernet RJ45 port that supports both Modbus TCP (16 ms cycle) and Ethernet-IP (64 ms cycle). Network configuration is handled through SoMachine or a compatible IEC 61131-3 IDE. Confirm your specific network topology and protocol requirements with the SoMachine configuration documentation, as simultaneous multi-protocol performance depends on scan cycle and network load.

Is the TM241CE40T a direct drop-in replacement for an older Modicon M241 unit from a previous machine generation?

Within the Modicon M241 family, backward compatibility with the programming environment and expansion module architecture is maintained. However, verify the physical connector type and terminal block pitch (5.08 mm removable screw terminals) against the existing wiring harness before assuming a direct swap. Confirm firmware version compatibility and re-test the application program after any controller swap — do not assume automatic forward compatibility of older SoMachine project files without validation.

Do I need to order the marine certification separately, or does every TM241CE40T ship with LR/ABS/DNV/GL approval?

Marine certifications (LR, ABS, DNV, GL under IACS E10) must be confirmed at the point of order — they are not automatically included with every unit. If your project requires a certificate of compliance for marine or offshore deployment, specify this requirement when placing your order through your distributor. Contact LeadTime.ca to confirm certification scope for your specific application before the purchase order is submitted.

What is the realistic lead time for the TM241CE40T, and is it typically in stock?

Typical lead times from authorized distributors in North America are 1–4 weeks depending on regional stock levels and order volume. The TM241CE40T is a widely distributed product in the Modicon M241 family, and stock is generally available through authorized channels. Lead times can extend during supply chain disruptions or for large-quantity orders. For confirmed availability and current lead time before committing to a project schedule, contact LeadTime.ca directly.

Why Order From LeadTime.ca

  • Global shipping on industrial automation parts including the full Modicon M241 family — no regional restrictions
  • Technical support during part selection, helping confirm I/O count, fast I/O requirements, and expansion module compatibility before the order is placed
  • Authorized distribution channel with verified product authenticity and full manufacturer warranty coverage — not gray market or surplus
  • Volume pricing and lead time commitments available for OEM production builds and multi-unit projects
  • Certificate of compliance and marine certification confirmation available at time of order for regulated applications

At-a-Glance Summary

  • Controller family: Modicon M241; catalog number TM241CE40T; 40 discrete I/O (24 inputs, 16 transistor PNP outputs)
  • Supply voltage: 24 V DC rated, 20.4–28.8 V range; inrush ≤50 A; power consumption 32.6–40.4 W
  • Fast I/O: 8 fast inputs (200 kHz HSC), 4 fast outputs (100 kHz PLS, 20 kHz PWM); standard channels at 1 kHz
  • Memory: 8 MB program flash, 64 MB system RAM; SD card slot for data logging
  • Communications: Ethernet RJ45 on-board (Modbus TCP 16 ms, Ethernet-IP 64 ms), USB, real-time clock
  • Expansion: 7 local I/O modules + 14 remote modules supported
  • Dimensions: 90 x 95 x 190 mm; 0.62 kg; DIN rail TH35-15 or TH35-7.5, or panel mount
  • Operating temperature: -10 to 50°C vertical / -10 to 55°C horizontal; 10–95% RH non-condensing
  • Certifications: UL 508, UL 1604, CSA, RCM, IACS E10 (LR, ABS, DNV, GL marine)
  • Output protection: Auto-reset short-circuit protection — 10 ms standard channels, 12 s fast channels; external 50 A fused disconnect required per UL 508
  • Direct upgrade path: TM241CE60T for >40 I/O; Modicon M241 with integrated analog for process sensor applications

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