A-B 1756-OB16E is a digital DC hybrid input and output module produced by Allen-Bradley(now a brand of Rockwell Automation),which integrates Ethernet communication function.The following is a detailed introduction to A-B 1756-OB16E:
I.Basic characteristics
Input part:It has 10-point sink type DC input,the input voltage is generally 24V dc,and the voltage range is 19.2~31.2V.When the input is 0,the maximum input current is 1.5mA.
Output part:It has 6-point source type DC output(some say that this module is a discrete output module with 16 output channels,divided into 2 electronic fusion groups,each with 8 channels),and the maximum output current of each point is 200mA(or 1A output current per channel at 60°C,and 8A output current per module at 60°C).
Terminal block:The recommended terminal block model is 1794-TB3 or 1794-TB3S.
A-B 1756-OB16E
2.Communication and network functions
Ethernet communication:The module communicates with external devices through the Ethernet interface,and can easily transmit and exchange data with PLC(programmable logic controller)or other control systems.It contains a dual-port EtherNet/IP card,which contains embedded switch technology to support device-level ring(DLR)topology.
3.Application scenarios and functions
Application scenarios:The A-B 1756-OB16E Ethernet module is suitable for industrial automation systems and can be used to connect various input devices(such as buttons,sensors,contacts,travel switches,etc.)and output devices(such as actuators,motors,relay coils,solenoid drive devices,indicator lights,alarms,etc.).
Functional features:The module can communicate with other devices via Ethernet for remote monitoring and control.It also provides built-in EtherNet/IP or DeviceNet network connection and includes DeviceLogix smart component technology to achieve local control of card output.In addition,it also has output short-circuit protection to protect the output against accidental wiring errors.
A-B 1756-OB16E
4.Other parameters and features
Modular design:The A-B 1756-OB16E Ethernet module adopts a modular design,which can load all circuits into one module to form a whole,with the advantages of small size,low cost and easy installation.
Compatibility:It is a single-slot wide module that is compatible with any 1756 ControlLogix controller and can be installed on any 1756 ControlLogix rack.
Temperature range:The operating temperature is between-25°C and 75°C(some say between 0°C and 60°C),and the non-operating temperature is between-40°C and 85°C.
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