Model Definition

490: Modicon network accessory series

NAE: Profibus DP junction box / tap series

91100: Main bus junction box, 1‑segment, no terminator

Technical Specifications

Hardware & Interface

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

Ports: 1× inlet 9‑pin SUB‑D female; 1× outlet 9‑pin SUB‑D female (for daisy‑chain)

Tap capacity: Up to 16 devices (via terminal blocks or external connectors)

Termination: None (bus ends use 490NAD91103)

Power: 24 V DC, 4 A (for bus repeaters/auxiliaries)

Dimensions: 125 × 70 × 32 mm

Weight: ~320 g

Protection: IP20

Color: Black

Performance & Environmental

Data rate: 9.6 kbps – 12 Mbps

Operating temp: 0 °C to +60 °C

Storage temp: −25 °C to +80 °C

Humidity: 5%–95%, non‑condensing

Core Functions

Bus concentration: Splits one main Profibus DP cable into multiple device connections

Inline pass‑through: Main bus continues via OUT port for daisy‑chain topologies

Centralized wiring: Reduces cable clutter and simplifies troubleshooting

Signal integrity: Matches Profibus DP electrical specs for reliable communication

Application Scenarios

Modicon Quantum / Premium PLCs (main controller bus interface)

Large Profibus DP networks with many devices (drives, I/O, HMIs)

Control panels requiring centralized bus wiring

Industrial automation: process, manufacturing, water treatment

Usage & Maintenance

Mount on DIN rail or panel; connect 24 V DC power

Wire main bus cable to IN, next segment to OUT

Connect device taps to internal terminal blocks (max 16)

Ensure bus ends use 490NAD91103 (120 Ω terminator)

Keep connections tight and dry; inspect periodically

Key Differences (NAE vs NAD Series)

490NAE91100: Junction box/tap (splits bus to many devices, for panel‑side concentration)

490NAD91103/04/05: Device connectors (for direct connection to PLCs/drives, 1‑to‑1)