140NOM21100 Modicon Quantum DIO Adaptor – Modbus+ RS485

Product Overview – 140NOM21100

• 140NOM21100 is a DIO head-end adaptor for Modicon Quantum
• Provides dual communication: Modbus+ and RS232/485
• Designed for high-speed data exchange (1 Mbit/s)
• Supports 30 input and 32 output words

Key Technical Data

• Brand: Schneider Electric (Modicon)
• Model: 140NOM21100
• Type: DIO head-end adaptor
• Ports: 1x Modbus+ (RS485 twisted pair), 1x Modbus RS232
• Transmission rate: 1 Mbit/s
• I/O capacity: 30 words input / 32 words output
• Power dissipation: 4 W
• Bus current: 780 mA
• Format: Standard Quantum module

Environmental & Electrical Specifications

• Operating temp: 0…60 °C (32…140 °F)
• Storage temp: -40…85 °C (-40…185 °F)
• Humidity: 95 % (non-condensing)
• Altitude: up to 5000 m (16404 ft)
• ESD immunity: 4 kV contact / 8 kV air (IEC 801-2)
• RF immunity: 10 V/m from 80…2000 MHz (IEC 801-3)

Compatibility & Diagnostics

• Works with 140CRA21120 and 140CRA21110 remote I/O heads
• Built-in processor with checksum and RAM address verification
• Diagnostic features: processor health, RAM integrity, communication status
• Supports Modbus Plus network for distributed control

Expert Review

• “Robust head-end for Quantum I/O. Dual port design adds flexibility for legacy systems.”
• “The 1 Mbit/s speed ensures fast data refresh in large I/O racks.”

Manager’s Insight

• “Ideal for retrofit projects. Keeps old Quantum racks running with modern networks.”
• “Global stock and 12-month warranty reduce plant downtime.”

Typical Applications

• Connects Quantum I/O racks to Modbus Plus networks
• Used in oil & gas, power plants, and water treatment
• Perfect for large distributed control systems (DCS)
• Bridges legacy Quantum I/O to newer SCADA systems

Installation & Maintenance

• Standard Quantum form factor – fits any Quantum rack
• No special tools required; insert and secure with screws
• LED indicators for power, network, and I/O status
• Firmware upgrades via Modbus port (if needed)

Diagnostic Capabilities

• Continuous checksum verification on all memory areas
• RAM address monitoring for early fault detection
• Communication watchdog timer (resets on failure)
• Error counters for Modbus+ bus traffic

Frequently Asked Questions

• Can I use this adaptor with older Quantum CPUs?
  Yes, it works with all Quantum CPUs that support rack I/O.
• Does it support Modbus TCP?
  No, only Modbus+ (RS485) and RS232 serial.
• What is the maximum cable length for Modbus+?
  Up to 500 m with twisted-pair copper cable.
• How many remote drops can I connect?
  Up to 64 nodes on a single Modbus+ network.
• Is the adaptor hot-swappable?
  No, power down the rack before installation.

Selection Guide – Which Quantum Head-End Adaptor?

• Choose 140NOM21100 for dual Modbus+ and RS232 ports
• For single Modbus+ only, see 140NOM21200 (different model)
• Check your remote head models: 140CRA21120 or 21110 required
• Verify I/O word count – 30/32 meets most mid-size applications

Shipping & Warranty

• Dispatch: 12‑24 hours (working days)
• Couriers: FedEx, UPS, DHL
• Warranty: 12 months (parts & labor)
• Package: Adaptor module only (no cables included)