Configured for high-speed network communication in PLC-5 ControlNet platforms, the Allen-Bradley 1771-ACN15 (1771-ACN15 Communication Interface Module) provides direct physical and electrical execution of single-port ControlNet node access.
Hardware Specifications
Parameter
Specification
Model
1771-ACN15
Brand
Allen-Bradley
Origin
USA
Weight
1.98 lbs (0.90 kg)
Dimensions
Standard 1771 Single-Slot Chassis Width
Operating Temp
0 to 60 deg C
Power Consumption
5.0 W (1.0 A at 5 VDC backplane current)
Product Line
PLC-5
Product Type
Communication Interface Module
Network Protocol
ControlNet 1.5 and beyond
Port Configuration
1 Port (Single-port non-redundant media)
Input Voltage
5 VDC
Mounting Style
Rack Mount (1771 I/O Chassis Slot)
Deterministic Backplane & Network Synchronization
The module manages high-speed backplane bus communication velocity and deterministic protocol conversion across ControlNet architectures. Operating as a single-port non-redundant media interface, the unit bridges local 1771 backplane I/O traffic to the ControlNet network link. Firmware flash compatibility ensures seamless integration with ControlNet 1.5 and subsequent protocol revisions, allowing time-critical I/O data transfers and peer-to-peer messaging without degrading backplane responsiveness.
Frequently Asked Questions
Q: What is the maximum backplane current draw for the 1771-ACN15?
A: The module requires 1.0 A at 5 VDC directly from the local 1771 chassis backplane power supply. Verify that the chassis power supply budget supports this load prior to installation.
Q: Does the 1771-ACN15 support dual-cable media redundancy?
A: No. The 1771-ACN15 is a single-port interface module designed strictly for non-redundant ControlNet media architectures.
Field Installation Guidelines
Disconnect main power to the 1771 I/O chassis before inserting or extracting the module to prevent electrical damage to the backplane bus interface.
Align the printed circuit board card edge with the guide rails of the designated 1771 chassis slot and insert the module until it locks securely into the backplane socket.
Lock the top and bottom chassis retaining latches to ensure solid physical seating and continuous chassis frame grounding.
Connect the ControlNet coax tap cable to the BNC port on the front face of the module, ensuring minimum bend radius rules for BNC coaxial trunk lines are maintained.
Verify that appropriate 75-ohm coaxial terminating resistors are installed at both physical ends of the ControlNet trunk segment.
