IDEC MicroSmart FC6A Replacement Guide

FC6A-C40K1CEJ 24V DC 24V DC transistor drain type 250 126

FC6A-C40R1DEJ -12V DC Relay -

FC6A-C40P1DEJ 12V DC 12V DC transistor source type 40 6

FC6A-C40K1DEJ 12V DC 12V DC transistor drain type 40 6

Note: The maximum digital I/O capacity of J1939 model (250 points) is lower than that of non J1939 version (520 points), as some system resources are used for CAN communication.

Detailed explanation of input specifications (key parameters)

All inputs of FC6A CPUs are sink source compatible and can be connected to NPN or PNP sensors without damage when reversed.

5.1 24V DC input (applicable to 24V power supply models)

Parameters: High speed input port, medium/constant speed input port

Rated input current 5 mA 7 mA

Input impedance 4.9 k Ω 3.4 k Ω

Minimum ON voltage 14.4V 14.4V

Maximum OFF voltage 5V 5V

Conduction delay 5 µ s+filter 35 µ s+filter

Turn off delay 5 µ s+filter 100 µ s+filter (constant speed)

Filter: Can be configured through software (0-32 ms) to eliminate contact jitter.

High speed input: can be used for high-speed counting or pulse capture at 50 kHz.

5.2 12V DC input (applicable to 12V models)

Parameters: High speed input, medium speed/constant speed

Rated input current 5 mA 6 mA

Input impedance 1.8 k Ω 2.0 k Ω

The on/off delay is the same as the 24V version. The analog I/O expansion capability of the 12V model is limited (up to 6 analog channels), but digital I/O can still be expanded to 40 points.

Detailed explanation of output specifications

6.1 Relay output (R1A/R1C/R1D models)

Parameter specifications

Maximum load per point 2A (resistive), 240V AC/30V DC

Maximum total current per common terminal 7A (COM1/COM2/COM4), 6A (COM3 depending on model)

Minimum load 1 mA/5V DC (reference value)

Electrical lifespan 100000 times (rated load, 1800 times/hour)

Mechanical lifespan of 20000000 cycles (no load)

Initial contact resistance ≤ 30 m Ω

Insulation withstand voltage 1500V AC (output to ground, output to output)

Engineering Tip: Relay output is suitable for AC loads or low-frequency switches, but attention should be paid to surge suppression (RC absorption or varistor) for inductive loads. The typical shutdown delay of the constant speed output port (non high speed) is 300 µ s, which is not suitable for high-frequency PWM output.

6.2 Transistor Output (P1C/K1C/P1D/K1D Models)

Parameters 24V model 12V model

Rated load voltage 24V DC 12V DC

Voltage tolerance 19.2~28.8V 10.2~18.0V

Maximum current per point 0.5A 0.5A

Maximum current per common terminal 3.5A (8 points/common terminal) 4A (specific model)

ON voltage drop ≤ 1V ≤ 1V

Leakage current ≤ 0.1 mA ≤ 0.1 mA

Overcurrent protection source type: current limiting resistor detection (4 points share one detection signal)

Leakage type: No same left

Shutdown delay (constant speed) 300 µ s 300 µ s

Turn off delay (high-speed) 5 µ s 5 µ s

High speed output port (specific point only): configurable for 65 kHz PWM or pulse train output (PTO) for servo step control.

Overcurrent protection mechanism: When the total current of a group of 4 output points exceeds the standard, the CPU will detect it through an interrupt and turn off the group's output within about 1 second to avoid damage. But the leakage type output does not have this protection and requires an external fuse.

Communication and network capabilities

The powerful communication capability of FC6A is its core advantage in replacing old PLCs.

7.1 Ethernet port (standard for all models)

Physical layer: 10BASE-T/100BASE-TX, RJ45, CAT. 5 or STP, maximum length of 100m, pulse transformer isolation.

Protocol support:

Modbus TCP (Server/Client)

User communication (no protocol, via socket API)

Maintain communication server (for programming software WindLDR)

PING (Network Diagnosis)

SNTP (Simple Network Time Protocol)

7.2 Serial port (RS232C/RS485 configurable)

Located on the same 8-pin RJ45 port, select RS232C or RS485 (2-wire/4-wire) through software. Support:

Modbus RTU master/slave

User communication (no protocol)

Directly connected to IDEC human-machine interface

7.3 USB Port (Mini-B)

USB 2.0 at full speed, not isolated (shared with internal circuitry), used for programming, monitoring, and data uploading and downloading. When used on industrial sites, it is advisable to avoid environments with long distances or severe electromagnetic interference.

7.4 SD memory card slot

Supports SD/SDHC cards (up to 32 GB) for:

Program backup and automatic loading

Data log (CSV format)

Formula parameter storage

Firmware update

7.5 SAE J1939 (J1939 model only)

Physical layer: J1939-11 (shielded twisted pair) or J1939-15 (unshielded twisted pair), with a speed of 250 kbit/s.

Data link layer: J1939-21 (supports multi packet transmission).

Application layer: J1939-71 (vehicle), J1939-75 (generator set and industrial), J1939-73 (diagnosis).

Network management: J1939-81, supports address declaration (static/dynamic).

Maximum number of messages sent: 100, receive 200.

Message length: 1-252 bytes per message.

Transmission method: event triggered or cycle triggered (cycle can be set to 10~655350 ms).

Built in PGN (parameter group number): 0x00EA00 (request), 0x00EB00 (confirm), 0x00EC00 (TPDT), 0x00ED00 (TPCM), 0x00EE00 (address declaration).