This is a CPU module from Schneider’s M340 series.

It is a P34 2020 type PLC CPU.

This module consists of 2 PCBs. I named them power supply board and CPU board.

The PCB are well designed, multi layer ones, as can be seen, the assembly is high quality.

The processing power comes from the Atmel AT91RM9200 32 bit ARM processor.

Unfortunately I haven’t managed to figure out what is the actual type of the 2 ICs under the processor (the 2 pieces of “IEG47 D9FJB”).

Additional to the careful PCb design the module has a steel shielding around the 2 PBCs, which makes it even more noiseless and more protected from EMI.

The 2 PCBs together:

P342020_open

The power supply board’s front side:

P342020_PSU_front

The power supply board’s back side:

P342020_PSU_back

The CPU board’s front side:

P342020_CPU_front

The CPU board’s back side:

P342020_CPU_back

URL: M340 P34 2020

8 channel, 16 bit analog input module.

Nicely designed, over-engineered PCB.

Note that the A/D converter is a 24 bit type (!) but in the PLC’s process image it transfers only the 16 MSBs.

Again, the microcontroller that connects to the backplane is a unique “Schneider brand” type (1NTC012659).

If anyone has some information about what type of IC is it, please let me know!

All the used components seem to be the highest quality.

Front side of the PCB:

AMI0810_front

Back side of the PCB:

AMI0810_back

URL: Schneider AMI0810

This is a counter input PLC module from Schneider.

It has 8 / 4 counting input (depending on the operating mode), counting rate at a maximum of 10 kHz.

All the counting functions are done by the “Schneider brand” microcontroller.

The inputs are galvanically separated by the 16 optocouplers.

Unfortunately I haven’t managed to figure out what type of optocouplers they are, their markings only says: R1A.

Nice PCB, good hardware designer job.

Front side of the PCB:

EHC0800_front

Back side of the PCB:

EHC0800_back

URL: Schneider EHC0800

Here is the inside of a Schneider DDO3202K, 32 digital output PLC module.

The PCB is a well designed one. Looking at the components used, some may think it is over designed, but this way it is almost undestroyable.

The connection with the backplane is done via a microcontroller (probably 16 or 32 bits), but it has a unique “Schneider” brand: 1NTC013062.

The digital outputs are separated (galvanically) into two groups (2×16 digital outputs).

The galvanic separation is done between the 2×16 digital inputs and the backplane connection.

Front side of the PCB:

DDO3202K_front

The back side of the PCB:

DDO3202K_back

URL: Schneider DDO3202K

Here is a photo of a Beckhoff EL2809, 16 channel, 24 V,  digital output module.

There is a nicely designed PCB inside the housing.

No microcontroller used, just a single ET1200 EtherCAT Slave Controller ASIC, which does all the “intelligent” functions.

The galvanic separation is done with 16 pieces of LTV-356T optocouplers.

The outputs are fed by 2 VN808 ICs

All the 16 signalling LEDs show the actual state of the EtherCAT side, not the voltage on the output pins, so if one output connects to a short circuit the corresponding LED will still be ON.

EL2809_front

URL EL2809

Here is a photo of a Beckhoff EL1809, 16 channel, 24 V,  digital input module.

There is a nicely designed PCB inside the housing.

No microcontroller used, just a single ET1200 EtherCAT Slave Controller ASIC, which does all the “intelligent” functions.

The galvanic separation is done with 16 pieces of LTV-356T optocouplers.

Note that, on the input, the front-end consists of 4 pieces of CLT3-4B ICs, which is an elegant solution for a “simple” digital input.

All the 16 signalling LEDs show the actual state of the INPUT, not the data on the EtherCAT side.

EL1809_front

URL: EL1809

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