NI cFP-2120 (Compact FieldPoint's Strong Serial Port Real-time Controller)

The cFP-2120 is the top model of the 21xx series: 3×RS-232 + 1×RS-485, 128 MB large memory, multi-serial port bus control, targeting complex multi-device, bus-type field applications.

1. Basic Information

Model: cFP-2120

Part Number: 777317-2120

Series: Compact FieldPoint (cFP-21xx flagship)

Positioning: Maximum serial ports, RS-485 bus, medium-large-scale real-time control, gateway, multi-device integration

II. Hardware Specifications (Key Point, Compared with 2100/2110)

Processor: 188 MHz Real-time CPU (Same as 2100/2110) Memory:

DRAM: 128 MB (same as 2110, 4 times larger than 2100)

Non-volatile storage: 128 MB built-in (double the 64 MB of 2100/2110)

Communication interface (strongest feature):

Ethernet: 1 × 10/100 Mbps RJ45 (TCP/IP, Modbus TCP)

Serial port: 3 × RS-232 (DB9) + 1 × RS-485 (RJ45)

→ The only 21xx model with RS-485, supporting bus-type networking

I/O expansion: cFP-BP-4 / BP-8 backplane, up to 8 cFP I/O modules

Storage expansion: CompactFlash card (program / data recording)

Power supply: 11–30 VDC industrial wide voltage

Temperature range: -40 °C ~ +70 °C (industrial wide temperature, same as 2100/2110)

Size / Weight: 127 × 102 × 51 mm, approximately 0.28 kg

III. Ultimate Comparison of cFP-2100 / 2110 / 2120 Table

Project cFP-2100 cFP-2110 cFP-2120 (Top Configuration) CPU 188 MHz 188 MHz 188 MHz

DRAM 32 MB 128 MB 128 MB

Built-in storage: 64 MB / 64 MB / 128 MB

Serial ports: 1×RS-232 / 2×RS-232 / 3×RS-232 + 1×RS-485

Typical applications: Economy type, single serial port / Dual serial port instrument / PLC / Multi serial port + RS-485 bus, complex control

IV. Software and Protocols

Real-time system: LabVIEW Real-Time

Programming: LabVIEW (recommended), LabWindows/CVI

Supported protocols:

Ethernet: Modbus TCP, NI Real-Time Network, TCP/IP

Serial ports: Modbus ASCII/RTU, Optomux (4 independent communication ports, RS-485 supports multi-node bus)

V. Typical Applications (Only 2120 Can Handle)

Multi-serial port device cluster: Connect 3 RS-232 instruments / PLCs + 1 RS-485 bus simultaneously

RS-485 bus master: Control multi-node sensors, frequency converters, Modbus RTU slave stations

Complex gateway: 4 serial ports ↔ Ethernet, multi-protocol conversion

Medium-sized data recording: 128 MB memory + 128 MB storage, suitable for high-density acquisition