Model Definition

• 490: Modicon network accessory series

• NAD: Profibus DP connector category

• 91105: In‑line connector with programming port, no terminator

Technical Specifications

Hardware & Interface

• Protocol: Profibus DP (RS‑485, galvanic isolation)

• Connector: 9‑pin male SUB‑D (device side), right‑angle

• Programming Port: 9‑pin female SUB‑D (front, for PLC/device programming)

• Termination: None (for middle nodes only)

• Wiring: Screw terminals for IN/OUT bus cables

• Cable Entry: Side entry

• Color: Violet

• Dimensions: ~30 mm (H) × 55 mm (W) × 65 mm (L)

• Weight: ~50 g

• Pinout: Pins 3 (RxD/TxD‑N), 5 (DGND), 6 (VP), 8 (RxD/TxD‑P)

Performance & Environmental

• Data Rate: 9.6 kbps – 12 Mbps

• Max Nodes/Segment: 32 (127 with repeaters)

• Operating Temp: 0 °C to +60 °C

• Storage Temp: −25 °C to +80 °C

• Humidity: 5%–95%, non‑condensing

• Protection: IP20

Core Functions

• In‑Line Connection: Passes Profibus DP signals through for daisy‑chain topology

• Integrated Programming Port: Enables direct connection to a PC for programming, monitoring, and diagnostics without breaking the bus

• No Termination: Reserves termination for bus ends (use 490NAD91103 there)

• Signal Integrity: Complies with Profibus DP electrical standards for reliable communication

Application Scenarios

• Middle stations in Profibus DP networks (PLCs, drives, I/O)

• Modicon M340/Momentum/Premium PLCs

• ATV61/ATV71 series VFDs with DP communication cards

• Lexium 15 motion systems, TeSys motor starters, Preventa Safety PLCs

• On‑site maintenance: Quick programming access without rewiring

Usage & Maintenance

• Use only for intermediate nodes (not at bus start/end)

• Wire incoming bus cable to “IN,” outgoing to “OUT”

• Use 490NAD91103 (with terminator) at the first and last nodes

• Keep connections tight and dry; inspect periodically for corrosion

• For programming, connect PC directly to the front 9‑pin female port

490NAD91103 / 91104 / 91105 Comparison