PD76-R5 (5 relays 16A, 6 digital inputs)

• The operation of peripherals depends on the used processor module and the firmware installed on it.

Food

The following power options are available:

• From an external calibrated DC source with a maximum supply voltage range of 9 to 56 V. Power is supplied to a dedicated external terminal.
• Passive PoE is supported via the Ethernet port connector.

When power is applied to both the external terminal and the Ethernet connector at the same time, power will be supplied from the external terminal.

For power supply through an external terminal, it is necessary to use a stabilized direct current source with a power of at least 5W. The recommended (nominal) input voltage range is from 12V to 48V (the maximum input supply voltage range is from 9 to 56V).

When using Passive PoE technology, power is supplied through the following pairs of Ethernet cable: pair 4(blue, white-blue) and pair 8 (brown, white-brown). The polarity of the connection does not matter. There is no galvanic isolation of power supply circuits in the controller. The recommended nominal input supply voltage of Passive PoE is from 12 to 48V.

Operating conditions

• Ambient temperature: 0..+40 С;
• Relative air humidity up to 80% without moisture condensation;
• Closed explosion-proof rooms without aggressive vapors and gases.

GPIO port expander

The peripheral board has an I2C GPIO port expander chip PCF8575. The I2C address of the expander chip is 0x22.

Pin Assignment:

Digital inputs

The controller contains 6 discrete inputs of the "dry contact" type, brought out to two external four-pin screw terminals with a contact pitch of 3.5mm. The closure of the discrete input must be made to the common contact (GND). Be careful when connecting digital inputs. Do not apply voltage to the digital inputs,  the board has pull-up resistors to 5V.

Relay

The controller contains 5 relays with a maximum switching current up to 16A. Recommended rated switching current - 10A. Switched voltage up to 250V AC. Galvanic isolation between relay contacts 1000V.

Relay 1 has an output type 1C (changeover contacts) and is connected to a three-pin screw terminal with a contact spacing of 5mm, the rest of the relays have an output type of 1A (normally open) and are connected to two-pin screw terminals with a contact spacing of 5mm.

I2C EEPROM

The peripheral board is provided with a non-volatile memory chip EEPROM AT24C64 or similar with a capacity of 64 Kbps (8 Kbytes). I2C address - 0x56. This memory can be used to store configuration, settings, etc. when installing the appropriate software.

UART1 connector

There is a separate optional 4-pin connector for the UART port on the peripheral board inside the case.

Purpose of the inputs of the "UART1" connector:

The output voltage at pin 1 (SERIAL_ID_VOLTAGE) of the connector is used to identify the UART port and for UART1 port is about 0.2V. >)

Connector IO1

A separate optional 4-pin GPIO connector is provided on the peripheral board inside the case, connected to two pins of a 40-pin connector.

Assignment of the inputs of the "IO1" connector:

The output voltage at pin 1 (IO_ID_VOLTAGE) of the connector is used for identification and for the IO1 port is about 1.8V. (see "Voltage Levels")

Internal peripheral connector

Peripheral connector 40 pin (20 ×2 pin) with a pitch of 1.27 mm is designed to connect the processor module to the peripheral (mother) board.

PLD-2x6-2.54 connector for installing the module in the motherboard

PLD-2x2-2.54 connector for connecting an external terminal