PPK-01 relay board for MX3660

PPK-01 relay board. is designed to work with the MX3660 controller. A wide range of input signal voltages (3-26 VDC) makes it universal and can be used in various automation systems.

PPK-01 has four built-in relays controlled by a digital input signal (0/1). The maximum load on the relay contacts is 10 A 250VAC. The relays can be connected in two modes: NC (normally closed) and NO (normally open), it depends on the application. The power supply voltage of the device is 12V. and the maximum current consumption is 200 mA.

Each relay is switched on individually with an input voltage from 3V to 26V. which allows connection to many CNC applications, e.g. directly to the LPT port (5V). to the MX3660 controller (e.g. 12V). SMC4D (CNC graph. 12V). csmio controller (24V) or PLC controller etc.

The relay board has a built-in potentiometer. thanks to which it is possible to calibrate the spindle speed control module. by adjusting the output voltage. The maximum load on the "Spindle control" output is 30 mA. PPK-01 also has a diode output on the gold pin connector. for connecting external diodes, e.g. on the device housing. We can plug the diodes directly into the connector. the board already has built-in resistors that limit the diode current. There are five diodes on the board indicating the device's operating status. LED5 indicates the presence of voltage on the board. LED1 LED2 LED3 LED4 diodes indicate the activation of individual relays.

LE-2 AK127 type connectors were used to connect the control signals and the spindle speed control module and power supply (connectors P1. P2. P3. P4). LE-3 AK127 with a maximum connector voltage of 300V and a forward current of 12A. and to connect the relay contacts, detachable STL950 connectors with a maximum voltage of 300V and a forward current of 15A were used. The device is made using lead-free technology. The binder used to assemble the device contains 99% tin and 1% copper.

• low cost
• small dimensions
• 12V power supply
• aesthetic workmanship
• easy assembly
• wide voltage range of control signals (3-26 VDC)
• high load capacity of relay contacts 10A 250V
• possibility of connecting and calibrating the spindle speed control module
• Connector for connecting external diodes. signaling the operating status of the relays

The connection diagram for external control devices is shown below. with differential signal (+.-).

The relay board allows you to control four relays (PK1. PK2. PK3. PK4). using four digital signals (0/1). The control signal voltage should be in the range from +3 VDC to +26 VDC. We connect the input signal masses together and connect them to the GND pin. EGND. At each input pin (PKX-) there is a pin (PKX+) that maintains a constant voltage of +12 VDC. We can, for example, use a transistor or a bistable/monostable switch between the PKX+ and PKX- pins. After closing the contacts of the switch or transistor, this will cause +12 VDC voltage to be applied to the control signal input (PKX-) and activate the given relay. The relay board is designed for the MX3660 controller. The connection diagram of the MX3660 controller to the PPK-01 relay board is provided later in the manual.

Below is a diagram of an example transistor connection. switches for PPK-01

The Spindle Control connector pins are used to connect the MX3660 controller with a built-in spindle speed control module (Spindle Control) from PPK-01. This makes it possible to adjust the spindle speed using e.g. the Mach3 program. thanks to the step and direction signal and calibration of the voltage controlling the inverter (0-10V). In most cases, the spindle speed is controlled by an inverter. which is usually controlled with a voltage from 0 to 10 V. By changing the value of this voltage, the revolutions change. The relay board has a built-in potentiometer. thanks to which it is possible to adjust the voltage controlling the inverter (Inverter connector).

The built-in potentiometer in the PPK-01 board is used to "tune" the output voltage controlling the inverter. on the P5 connector after previously connecting the MX3660 controller.

After connecting the MX3660 controller. starting the Mach3 program. and setting the maximum spindle speed in the program. we apply a multimeter (multimeter) between the GND pin and V1 on the P5 "Inverter" connector. We set the meter to measure direct voltage (DC). We measure the voltage value between these two pins (V1.GND). we adjust the control voltage value to 10V using the potentiometer. After calibrating the voltage, turn off the machine and connect the inverter according to the inverter instructions.

Signal diodes show the operating status of the device. Diode 5 (led5) signals the presence of voltage on the device. after connecting 12 VDC to the P1 connector, the diode should light up, informing us that the device is ready for operation. The diodes 1. 2. 3. 4. (led1. led2. led3. led4.) signal the operating status of individual relays. After applying the control signal to the P2 connector. the relay will be switched on and the diode will light up to indicate that the relay is switched on. The diodes correspond to individual relays:

PK1 – LED1 (diode no. 1)

PK2 – LED2 (diode no.2)

PK3 – LED3 (diode no.3)

PK4 – LED4 (diode no. 4)

The doid connector is used to connect external diodes. e.g. on the housing of the CNC controller being built. The board already has built-in resistors that limit the diode current. which allows direct connection of the diode to the connector pins. The diagram below shows how to connect the diode. The idea of operation of external diodes is analogous to the operation of signaling diodes of relays.

Diagram showing the connection of a diode to the connector

To prevent control disturbances. all relay control cables and cables to the spindle speed control module and the cable from PPK-01 to the frequency converter (inverter). must be properly grounded. The correct way to do this is shown in the figure below:

Four transistors are installed in the MX3660 controller. controlling four outputs (Output1. Output2. Output3. Output4). The plus sign at each output denotes the transistor's collector and the minus sign at each output denotes the transistor's emitter. To run the board with the driver, we need to connect the power supply to the transistors. i.e. pins PK1+.PK2+. PK3+. PK4+ of the relay board to the Output1+ pins. Output2+. Output3+. Output4+ driver. Then transistor emitters pin PK1- to pin Output1-. pin PK2- to to pin Output2-. PK3- pin to Output3- pin. pin PK4- to to pin Output4-. Connect the spindle speed control module as follows: +10Vdc pin in the controller to +10V pin in PPK-01. pin 0-10V in the controller to pin 0-10V in PPK-01. EGND pin in the controller to the EGND pin in PPK-01. The table below shows the connection of individual pins.

The diagram shows the connection of individual pins of the MX3660 controller to the PPK-01 relay board.

Resistors:
R1. R2. R3. R4. R15. R16. R17. R18. R19 – 2.2 kΩ
R5. R6. R7. R8 – 4.7 kΩ
R9. R10. R11. R12 – 10 kΩ

Diodes:
LED1. LED2. LED3. LED4. LED5 – 3mm
D1. D2. D3. D4. D6. D7. D8. D9 – IN4148

Capacitors:
C1 – 470uF/25V

Potentiometer:
PR1 – 2.2 kΩ

Relays:
CP1. CP2. CP3. PK4 – HF115F

Connectors:
P1 – 1x ARK2
P2 - 4x ARK2
P5 – 1x ARK2
P4 – 1x ARK3
P3 – 2x STL950
2x AKZ950
Gold pin 2x4

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