The 1771-CAN is a module in the Allen-Bradley 1771 I/O (input/output) system for industrial automation. Depending on the model, there are two possible features associated with the 1771-CAN:
CANopen Communication Module (1771-CANN) :
This module allows Allen-Bradley PLC (Programmable Logic Controller) to communicate with devices on the CAN (Controller Local Area Network) bus.
CANopen is a communication protocol designed for industrial automation applications.
It supports the exchange of data between the PLC and other devices on the network, such as sensors, actuators and other controllers.
DeviceNet Communication Module (1771-SDN) :
This module allows Allen-Bradley PLC to communicate with devices on the DeviceNet network.
DeviceNet is another communication protocol commonly used in industrial automation to connect smart devices.
The 1771-SDN serves as a DeviceNet slave device that responds to commands from the PLC and provides data from connected sensors or actuators.
Allen-Bradley 1771-DE is an absolute value encoder module. What makes it an absolute encoder is that it is an intelligent module that responds quickly to the machine position using only a programmable controller scan. The 1771-DE can track the position of the absolute encoder. Depending on the difference between the preset value and the encoder position, it can control up to 8 high-current outputs. All eight outputs have throughput of less than 200 us and can communicate via block transfer to a programmable controller. When all outputs are turned on, the module can run 16A DC continuously as each output switches 2A DC without derating. The 1771-DE has a +5V DC input supply with a total output voltage tolerance that includes line/load regulation, drift, and ripple. The maximum capacity current required is 300 mA, and the encoder format is BCD, natural binary, and standard gray.
The module has an estimated size of 6 "x 3" x 10 "(15 cm x 8 cm x 25 cm) and a weight of 1.30 kg. It has a new write throughput time of 4.7 milliseconds and a 9 pound inch wiring arm connection. Keying is only available between pins 2 and 4 of slot 0 and between pins 26 and 28. Under ambient conditions, the operating temperature is 32-140 degrees Fahrenheit. The module has a storage temperature between -40 and 185 degrees Fahrenheit and is 5-95% non-condensing. The setup time of the encoder module is 100 ns and the output fuse is 3A. The 1771-DE has 800 mA backplane current at 5V DC and a maximum input frequency of 50 KHz. Encoder module can choose 5-24V DC output power supply. The input current is II mA per channel for the single end and I8 mA for the differential driver, and these currents are absorbed by the encoder device. The input and output isolation voltages are 1500V RMS, the input voltage range and logic state are 1.7V DC for logic 1 and 0-0.6V DC for logic 0. The 1771-DE offers a 4A surge rating of 10 ms with a VA rating of 48 watts per output and 384 watts per module. It has a high realistic logic starting with a totem pole, open collector or differential driver. The 1771-DE has an adjustable rotation direction to increase the position of the Gray code encoder.
