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Revisions: Ser A

Description:   The Allen-Bradley 1794-ACNR Flex I/O Controlnet Redundant Media Adapter has a 24 V DC Voltage, a 8 Modules I/O Capacity, and a 19.2-31.2V DC Input Voltage Range. It also operates with a 850V DC Isolation Voltage and a 23A for 2ms Inrush Current.

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About 1794-ACNR

The Allen-Bradley 1794-ACNR is a ControlNet FLEX I/O redundant media adapter module. It has an 8 I/O module capacity and a communication rate of 5 Mbits/s. Including a 5% AC ripple, the module has an input voltage range of 19.2-31.2V DC and a nominal input voltage rating of 24V DC. This module’s power consumption is 400 mA when using a 24V external power supply. The maximum Flexbus output current is 640 mA at 5V DC. The module’s maximum power dissipation is 4.6 W at 19.2V DC and the thermal dissipation is 15.7 BTU/hr at 19.2V DC. The 1794-ACNR module’s operating temperature is -20-55 ˚C and its non-operating temperature is -40-85 ˚C. It has a maximum ambient air temperature of 55 ˚C and a non-condensing relative humidity of 5-95%. This module also has an operating vibration of 5 g at 10-500 Hz, an operating shock of 30 g, and a non-operating shock of 50 g.

Red and green indicators are present with this module, particularly 1 status indicator and 2 communication indicators. The module can be mounted with a DIN rail mount or a panel mount. The 1794-ACNR module has an open-type enclosure and measures 3.7 x 3.6 x 3.4 inches. The ControlNet protocol is v1.25 and 2 ControlNet BNC ports are present with this module.

It can connect to up to 8 terminal base units that have FLEX I/O modules installed, making a FLEX I/O system of up to 8 slots. The power supply used with this module should have a Safety Extra Low Voltage (SELV) or a Protected Extra Low Voltage (PELV) to comply with the CE Low Voltage Directives (LVD).

Technical specifications:

Part Number:1794-ACNR
Product Type:Flex I/O Controlnet Redundant Media Adapter
Voltage:24 V DC
Input Voltage Range:19.2-31.2V DC
Flexbus Output Current:640 mA max.
Isolation Voltage:850V DC
Inrush Current:23A for 2ms
Power Dissipation:4.6W max. @ 19.2V DC
Communication Rate:5M bps
Power Dissipation:4.6W maximum @ 19.2V dc
Thermal Dissipation:15.7 BTU/hr @ 19.2V dc

Please refer to the manual for more information about the 1794-ACNR such as the wiring diagrams, data sheets, firmware information and migration or obsolescence details.

Revision Part # Also Known as Availability
1794-ACNR Ser A
1794-ACNR/A, Series A, Rev A Request Quote

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