Allen - Bradley 1756 - CNB/D is a communication adapter module. Here are its brief English - language parameters:
Model Number: 1756 - CNB/D
Brand: Allen - Bradley
Module Type: Communication Adapter (Bridge Module)
Communication Protocol: DeviceNet
Maximum Nodes: 99
Maximum Connections: 64
Communication Rate: 5 Mbps on ControlNet
Input Current: 970 mA at 5.1 VDC, 1.7 mA at 24 VDC
Power Dissipation: 5.14 W
Thermal Dissipation: 17.4 BTU per hour
Weight: 0.57 pounds (0.26 kg)
Slot Width: 1
Enclosure Type: Ruggedized Panel Mount
Temperature Range: - 20 °C to + 70 °C
Humidity Range: 0% to 95% non - condensing
RFI/EMI Compliance: EN 50121 - 4 - 2
Connection Type: DB9 connector