1. General Description

2. Product Identification

• Model: 170PNT16020

• Manufacturer: Schneider Electric (Modicon)

• Product Line: Modicon Momentum (170 Series)

• Protocol: Modbus Plus (MB+)

• Data Format: IEC 61131‑2

• Ports: 2 × DB9 female (Port A, Port B)

• Baud Rate: 1 Mbps

• Power: 24 VDC (supplied by I/O base)

• Power Consumption: ≤ 2.4 W

• Dimensions: 90 mm × 160 mm × 60 mm (W × H × D)

• Weight: Approx. 0.11 kg

• Mounting: DIN rail (via I/O base)

• Status: Obsolete; replacement: 170ENT16021

3. Specifications

3.1 Electrical

• Interface: RS‑485 differential, MB+ standard pinout

• Cable: MB+‑compliant shielded twisted pair

• Max. Segment Length: 5,000 m (with repeaters)

• Operating Voltage: 24 VDC ±10%

3.2 Environmental

• Operating Temperature: 0 °C to +40 °C

• Storage Temperature: 0 °C to +50 °C

• Relative Humidity: 5%–80% (non‑condensing)

• Altitude: Up to 1,000 m (no derating)

• Protection Class: IP20 (indoor use only)

• Certifications: UL, CSA, CE, RoHS

4. Compatibility

• Platforms: Modicon Momentum 170 Series, Quantum, Premium

• I/O Bases: All Momentum I/O bases

• Controllers: Premium, Quantum, M340 (with MB+ port)

• Software: Unity Pro, MB+ Network Configurator

• Topologies: Peer‑to‑peer, master‑slave, linear trunk, dual‑cable redundant

5. Features

• Dual‑Port (A/B) Design: Supports standard or fault‑tolerant redundant networks; automatic failover.

• IEC 61131‑2 Format: Native compatibility with Momentum and Unity Pro.

• 1 Mbps Speed: Deterministic, real‑time communication.

• Hot Swap: Replace module without network shutdown.

• LED Indicators:

  • PWR (Green): Power OK

  • ACT (Green): Network activity

  • ERR A/B (Red): Port A/B communication fault

• DB9 Connectors: Industrial‑grade, vibration‑resistant.

• Tool‑Free Mounting: Snap‑on to I/O base.

6. Applications

• Distributed I/O on Modbus Plus networks

• High‑speed PLC‑to‑I/O and PLC‑to‑PLC links

• Redundant MB+ systems (high availability)

• Factory automation: material handling, packaging, process control

• Legacy 984 system upgrades

• Compact machine/skid I/O solutions

7. Installation

1. Power Off: Disconnect power to the I/O base.

2. Mount Adapter: Align with base connector, push firmly until latch clicks.

3. Connect Cables: Attach shielded DB9 cables to Port A and/or B per topology.

4. Termination: Install 120 Ω terminator at both ends of each trunk.

5. Power On: Restore power; verify PWR LED is on.

6. Addressing: Set unique node address via rotary switches (front panel) or software.

7. Configuration: Use Unity Pro or MB+ Configurator to set parameters (baud rate, redundancy, I/O mapping).

8. Operation & LED Codes

• PWR (Solid Green): Module powered normally.

• ACT (Flashing Green): MB+ token passing and data exchange active.

• ERR A/B (Solid Red): Fault on port A/B (cable, short, duplicate address).

• LED Flash Sequences (Diagnostic):

  • 1 flash: No network token detected.

  • 2 flashes: Token detected but not received.

  • 3 flashes: No network activity detected.

  • 4 flashes: Duplicate node address detected.

9. Maintenance

• Inspect DB9 connectors for dirt, bent pins, or wear quarterly.

• Check LED status during normal operation; investigate persistent ERR lights.

• Avoid sharp bends or mechanical stress on cables.

• Follow MB+ grounding rules: single‑end shield grounding.

• Replace module if communication faults persist after cable/termination checks.

10. Safety Instructions

• Installation and service must be performed by qualified personnel.

• Always disconnect power before inserting/removing module or cables.

• For indoor industrial use only; avoid moisture, corrosive gases, and direct sunlight.

• Do not use damaged modules or cables.

• Dispose of waste per local electronic waste regulations.

11. Troubleshooting

No Communication

• Check 24 VDC power and seating of module.

• Verify cable connections and 120 Ω termination at trunk ends.

• Confirm unique node address (no duplicates).

• Check network topology (no loops, correct grounding).

Intermittent Communication

• Inspect for loose connectors, cable vibration, or poor shielding.

• Reduce EMI sources (variable‑frequency drives, motors).

• Verify environmental conditions (temperature, humidity).

Redundant Port Failover Issues

• Check both Port A and Port B cables and terminations.

• Verify redundancy parameters in configuration software.

• Test failover by disconnecting one port; confirm switch to standby port.