1. General Description

2. Product Identification

• Model Number: 170LNT81000

• Series: Modicon Momentum

• Type: ControlNet Communication Adapter

• Protocol: ControlNet (Producer/Consumer)

• Interface: 1×BNC coaxial port (ControlNet)

• Baud Rate: 5 Mbps (fixed)

• Node Address: 1–99 (set via rotary switches)

• LEDs: RUN, FLT, NET

• Dimensions: 125 × 45 × 100 mm

• Weight: 0.10 kg

• Protection Class: IP20

• Certifications: CE, UL, cUL, CSA, RoHS

• Firmware: v2.30 (field-upgradable)

3. Communication Specifications

• Network Topology: Trunk-and-drop (coaxial)

• Network Speed: 5 Mbps (fixed)

• Max Nodes: 99 nodes per network

• Data Size: Inputs up to 256 bytes; Outputs up to 256 bytes

• Connection Modes: Scheduled (real-time), Unscheduled (messaging)

• Error Control: CRC, duplicate packet detection

• Isolation: Galvanic isolation between backplane and ControlNet

4. Electrical Specifications

• Power Source: 24 VDC from Momentum backplane

• Operating Voltage: 19.2–28.8 VDC

• Typical Current Consumption: ~140 mA

• Protection: Surge, ESD, overcurrent, reverse polarity

• ControlNet Power: Powered via network (24 VDC optional)

5. Environmental Ratings

• Operating Temperature: 0 °C to +60 °C (non-condensing)

• Storage Temperature: -40 °C to +85 °C

• Relative Humidity: 5%–95% (no condensation)

• Vibration: IEC 60068-2-6 (10–150 Hz, 0.15 mm)

• Shock: IEC 60068-2-27 (15 g, 11 ms)

• Altitude: Up to 5,000 m (derate >2,000 m)

6. Key Features

• ControlNet Producer/Consumer communication

• Fixed 5 Mbps high-speed deterministic network

• Rotary-switch node addressing (1–99)

• Scheduled I/O + unscheduled messaging support

• Three LEDs for status diagnosis

• Hot-pluggable on Momentum I/O bases

• Compatible with all Momentum I/O bases

• Supports redundant media (optional)

7. Compatibility

• I/O Bases: All Modicon Momentum 170-series bases

• PLCs: Quantum, Premium, M340, Momentum M1/M2

• Software: Unity Pro, ControlNet Configuration Tool, RSNetWorx

• Cables: ControlNet RG-6/U coaxial cable (BNC connectors)

• Termination: 75 Ω terminators at both ends of trunk

8. Applications

• High-speed distributed I/O control

• Automotive assembly lines

• Process control (chemical, food & beverage)

• Material handling and conveyor systems

• Robotics integration

• Real-time factory floor networking

9. Installation & Operation

1. Power off the Momentum rack.

2. Insert the adapter into the communication slot of a Momentum I/O base and lock it.

3. Set the node address (1–99) via rotary switches.

4. Connect the ControlNet coaxial cable to the BNC port.

5. Ensure trunk cable has 75 Ω terminators at both ends.

6. Power on; verify RUN LED steady, FLT off, NET blinking.

7. Configure in PLC software and test I/O communication.

10. Maintenance

• Inspect BNC connections and LEDs every 6 months.

• Keep module surface clean and dry.

• Check cable integrity and termination resistance (75 Ω).

• Avoid corrosive environments and excessive vibration.

• Update firmware periodically via Unity Pro.

11. Safety Notes

• Installation/service only by qualified electricians.

• Disconnect power before wiring.

• Do not exceed 28.8 VDC on backplane or network.

• Use only RG-6/U ControlNet cables with BNC connectors.

• Dispose of per local e-waste regulations.

12. Troubleshooting

• FLT ON: Node address conflict, duplicate node, or network overload.

• NET OFF: No network power, cable break, or missing termination.

• Data Latency: Check scheduled bandwidth allocation in network configuration.

• Communication Drops: Inspect BNC connections, cable damage, or loose terminators.