cRIO 4422 Module
The NCT 4422 cRIO Module is a 4 channel hardware module for serial communication with RS422 systems. It offers:
The NCT 4422 cRIO Module supports SSI, RS232 protocols and any other serial protocol based on RS422 hardware. FPGA code for SSI and RS232 protocols can be provided on request. The NCT 4422 has a 25-pin DSUB female connector that provides connector pins for four differential digital input channels, four differential output channels and for the power supply.
Each RX and TX channel of the NCT 4422 provides pins for connecting to a RS422 device. The RX and TX channels can also be used as high speed TTL inputs/outputs with non-inverting and inverting single ended I/O.
Each RX and TX channel includes a COM pin. All COM pins are internally connected and galvanic isolated from the chassis’ ground. Each RX and TX channel offers an LED to indicate the state of the channel. When a channel LED is on, the channel is active. When the LED is off, the channel is inactive.
It is necessary to connect an external power supply to the NCT 4422. This power supply provides power supply for the transceivers inside the module.
The NCT 4422 cRIO supports a power-saving sleep mode. In sleep mode the power consumption of the NCT system is reduced to a minimum amount and its heat dissipation is also reduced in comparison with normal operation mode.
Sleep mode is supported at system level and the way it is supported depends on the type of chassis the NCT module is plugged in. Refer to your chassis’ manual for information about supporting sleep mode. Usually, it is not possible to communicate with an NCT system in sleep mode.
- 4-channel differential digital output
- 4-channel differential digital input
- RS422 common mode -7V to +12V
- Single ended TTL mode possible
- Input delay time 46ns typ.
- Output delay time 35ns typ.
The NCT 4422 cRIO Module supports SSI, RS232 protocols and any other serial protocol based on RS422 hardware. FPGA code for SSI and RS232 protocols can be provided on request. The NCT 4422 has a 25-pin DSUB female connector that provides connector pins for four differential digital input channels, four differential output channels and for the power supply.
Each RX and TX channel of the NCT 4422 provides pins for connecting to a RS422 device. The RX and TX channels can also be used as high speed TTL inputs/outputs with non-inverting and inverting single ended I/O.
Each RX and TX channel includes a COM pin. All COM pins are internally connected and galvanic isolated from the chassis’ ground. Each RX and TX channel offers an LED to indicate the state of the channel. When a channel LED is on, the channel is active. When the LED is off, the channel is inactive.
It is necessary to connect an external power supply to the NCT 4422. This power supply provides power supply for the transceivers inside the module.
The NCT 4422 cRIO supports a power-saving sleep mode. In sleep mode the power consumption of the NCT system is reduced to a minimum amount and its heat dissipation is also reduced in comparison with normal operation mode.
Sleep mode is supported at system level and the way it is supported depends on the type of chassis the NCT module is plugged in. Refer to your chassis’ manual for information about supporting sleep mode. Usually, it is not possible to communicate with an NCT system in sleep mode.
Advantages
- Control LEDs indicating whether a TX or RX channel is active
- Sleep mode for power-saving
- Supports almost any common serial protocol
- High speed operation with very short input and output delay times
- Channels can be used as high speed TTL inputs/outputs
Conclusion
The NCT 4422 cRIO Module is a versatile 4 channel hardware module for serial communication with RS422 systems using various common serial protocols. It comprises four differential digital output and output channels that can also be used as high speed TTL inputs and outputs. Status LEDs for each channel indicate whether a channel is active or not.
The module also supports a power saving sleep mode with reduced power consumption and heat dissipation which is controlled by the chassis at system level.