R4PLB04 4DI 4DO RS485 Modbus Remote I/O Core Board – Pulse Counter with 2.54mm Pin Header

The R4PLB04 is a multifunctional product:

1. Configurable NPN/PNP level input(Registers 0x00F1)

2. Configurable PNP/NPN level output(Registers 0x00F2)

3. Counts input pulses (registers 0x0020-0x0023)

4. Multiple Output control modes: inching, self-locking, and interlocking

(Registers 0x0000-0x0003)

5. Watchdog function (Register 0x00F3)

6 Remote IO function (Registers 0x00F5-0x00F6)

7 Automatic reporting of digital input(DI) status(Register 0x00F8)

8 Input and output relationship（DI-DO relationship）(Register 0x00FA)

Features:

1: Operating Voltage: DC 3.3-5V(Can be powered by 3.7/3.85V battery)

2: Operating Current: 8-10MA

3: 4ch 3-5V TTL Level NPN Input Ports(Configurable as PNP)

4: 4ch 3-5V TTL Level PNP Output Ports(Configurable as NPN)

5: The input-output relationship can be set to various association modes through instructions(Self-lockingdefault)/Interlocking/Momentary/Interlocking/Output=Input)

6: The input port can remotely control the output port of another board through the RS485 bus

7: The input port has a counting function. It can count pulses greater than 100MS (the pulse width can be set from 10 to 2000MS).

8: Support standard Modbus RTU command, function code, write 05/06/15/16 read 01/02/03

9: With hardware factory reset jumper, shorting the RES jumper for 5 seconds will restore the factory settings.

10: MODBUS commands can be made serial HyperTerminal (serial assistant)  OR "Modbus Poll"Enter;

11: Under the MODBUS command mode, it can support up to 254 devices in parallel

12: The default baud rate is 9600BPS. The baud rate can be selected by Conmand 2400 4800 9600 19200 38400 57600 115200BPS

13: The parity can be none parity, even parity and odd parity

14: The data sending and returning time can be set,with a maximum value of 1000ms

15: Size: 17.78*15*2.8MM

16: Weight: 0.8g

Input port

1 Default NPN, can be set to PNP

2 3-5.5V level input

Note: The input port is not isolated, do not over-voltage input

Output port

1 Default PNP, can be set to NPN

2 3.3-5V TTL level output

NOTE:

1 The output level is consistent with the operating voltage

2 The MCU outputs directly, and the load current cannot be greater than 10MA

Precautions for use:

1 The working power supply is DC 3.3-5.5V, no overvoltage and no reverse connection

2 The input port level cannot be greater than 5.5V, otherwise it will cause damage to the port

3 The output port level voltage is consistent with the working voltage, and the output drive current cannot be greater than 5MA

This is a multi-function core board. By configuring registers, you can achieve many useful functions. For details, please see:"R4PLB04 MODBUS RTU Commamd"

Input port pulse counting function:

DI Counter(registers 0x0020-0x0023):

Record the number of DI pulses greater than 100MS. Pulses less than 100MS will be ignored.

The initial value is 0 or set by the DI Counter Setting (0x0040-0x0043) Register.

DI Counter Setting(registers 0x0040-0x0043):

If the written value is less than the DI Counter (0x0020-0x0023) value, the DI Counter value will automatically subtract the DI Counter Setting (0x0040-0x0043) value.

If the written value is greater than the DI Counter (0x0020-0x0023) value, the DI Counter value will be reset to 0

DI Counter Pulse Width(registers 0x0060-0x0063):

The setting value is 0-199, unit is 10MS. Default value is 10. The pulse width can be set through this register.

For example: if the setting value is 10, pulses less than 100MS will be ignored, and pulses greater than 100MS will be counted.

How to set up remote control:

1The RS485 address and baud rate must be the same (it is recommended to restore both boards to factory settings).

2 Enable Remote IO Receiver: 01 06 00 F6 00 01 A8 38

3 Enable  Remote IO Sender : 01 06 00 F5 00 01 58 38