1 February 2017
Show all


Preconfigured Central Controller

The ESX-3XL is a robust, high-performance safety control unit, which can be programmed in C, Matlab and – as the first certified control unit – also with CODESYS Safety SIL2 in IEC61131.
Apart from the ESX-3XL (L stands for Large), the ESX-3XM (M for Medium) version is also available, which is more or less equivalent to half a ESX-3XL with regard to construction size and number of inputs / outputs.
Both control devices are suitable for safety-related applications up to Performance Level PL d or Safety
Integrity Level SIL 2 and are based on a common architectural concept: In a robust aluminium die cast housing with automotive plug-in connector, a fast 32-bit microcontroller works with 6MByte Flash and 4MByte.
SRAM, four CAN-interfaces, one series interface, one buzzer and several LEDs.

Flexibility / scalability

Apart from the flexible adaptation possibilities in the basic version – e.g. all inputs can be configured as

current/voltage/digital or speed input using init-functions – the possibility to extend the device using so-called “Expansion boards” is the unique characteristic of the STW control device series:

On three (ESX-3XM) or six (ESX-3XL) slots, expansion boards with nearly unlimited additional functions cover a

wide range of applications for your machine. Currently, there are 14 expansion board versions with different inputs and outputs, additional RS232/RS485/ CAN interfaces or even a programmable Linux system including Ethernet and USB available.

There is also the possibility to develop customerspecific expansion boards quickly and cost-effectively in order to fulfill highly customized requirements, e.g. for technical special solutions or to protect against product piracy.

Safety and diagnosability

A second, independent processor monitors the different system voltages and the program sequence. If required, it switches off all outputs using a second switch-off path or resets the main controller.

Digital and analog feedback for nearly all signal paths allow a comprehensive diagnosis of the system including the inputs and outputs.

In particular for safety-related applications, a safety layer API is available, which makes a separation of safe and non-safety (and non-interfering) application parts possible by means of a memory protection unit. This reduces the effort for re-certification in case of changes to the (non-safety) application software substantially.

The creation and maintenance of a safety-related application is possible comfortably using the safety manual and the diagnosis library.


The application software for the ESX series can be created very efficiently either in the standard language “C” or according to IEC 61131-3 (CODESYS V3); a Matlab package is additionally available. Numerous comfort functions, such as current regulators & ramp functions for outputs or frequency determination for inputs are already integrated in the API. Various

additional libraries, such as for example for CANopen, J1939 or error handling, simplify the system integration.

The clearly structured user manual and an inexpensive tool chain complete the comprehensive package.

Special features

  • High computing power due to 32-bit TriCore processor with 32-bit floating point unit.
  • High switching capacity of up to 135 A
  • Up to 136 I/Os possible; outputs for both ohmic and inductive loads.
  • Programmable sensor voltage supplies
  • Communication via CAN, Ethernet, USB, LIN and series interfaces

Comprehensive software package with IDE, compiler and libraries for C or CODESYS

ESX-3XL is a product of
Sensor-Technik Wiedemann GmbH
All rights are reserved.



3XL- Basis
3XL- E6
CANFull CAN 2.0 B interfaces, low/high speed up to 1 MBit/s444
RS232Programmable baud rate up to 1 15 kBit/s111
ProgrammingFreely programmable in the stan- dard language “C“ (comfortable API library), Matlab or under CoDeSys Safety SIL2 (IEC6 1 131-3) additional libraries + tools
System Data
Power supply9 ... 32 V DC
IndicatorsBuzzer, 4 status LEDs (two-tone)
Current consumption200 mA (24 V) ... 350 mA (12 V), stand by < 1 mA
Analog input_40VDigital/analog inputs, 0 ... 40
V , 12-bit, high/low active and programmable switching levels, short-circuit proof
--32, 16
Resistor input_2.5kR500 ... 2500 ohm, 12-bit--4, 2
Analog output_
Analog output 0 ... 20 mA or 5 ... 10 V , configurable via Software--2, 1
Digital output_
2 A, high-side, with current measurement, short-circuit proof and diagnosable--20, 10
Analog input_
Analog inputs, 0 ... 20 mA, 12-bit, short-circuit proof--4, 2
4 A, high-side, 0 ... 100 %, with current measurement, short-circuit proof and diagnosable888
Digital /PWM
2.5 A, high-side, 0 ... 100 %, with current measurement, short-circuit proof and diagnosable161616
Multi-function input_UIFDMulti-function inputs, which can
be switched as analog, digital and speed inputs via the software. The inputs are short-circuit proof and diagnosable. Furthermore, up to 4 short-circuit proof incremental inputs can be implemented.
Sensor supply
Independent, stabilized voltage suppl y , programmable 5 ... 10 V333
Digital /PWM
2 A, high-side, 0 ... 100 %, with current measurement, short-circuit proof and diagnosable--12, 6
Internal connection portFor expansion boards, with up to 14 inputs / outputs each, e.g. for digital or analog I/Os, PVG outputs for Danfoss-valves, input for encode r , motor bridge, communications
interfaces or customer-specific design
----, Up to 6
Mechanical Data
Connector2 x 81-pole mobile-compatible connector ( T yco / AMP)
DimensionsApprox. 248 mm x 217 mm x 51 mm
(approx. 9.76“ x 8.54“ x 2.01“)
WeightApprox. 2.5 kg (5.5 lbs.)
Environmental Requirements
RequirementsInspections acc. standards and requirements for vehicle, agricultural machinery and the construction machinery industry as well as CE conformity
Operating temperature-40°C ... +85°C (-40°F ... 185°F) (housing temperature)
Processor System
RAM4 MByte external memor y , 80 kByte internal controllers memory
EEPROM32 kByte
Processor32-bit controlle r , 150 MHz, separate system supervisor with programmable watchdog

Code 1030108000400 UNIT ESX-3XL + 5BB EB05, 1BB EB10