RS-485 Network Interface Module Type 1+ (NIM-1+)

Features and Benefits

  • 2-Wire Isolated RS-485 Interface with Selectable On-board Biasing and Termination
  • Protocols: Master or Slave Modbus RTU/ASCII, Master or Slave FairNET, and Custom ASCII or Binary Messaging
  • Network Configuration Tools Integrated in Design Pad G3
  • Multiple NIMs Can Be Combined to Form Gateway, Bridge, Routing, and/or Redundant Connection Functionality
  • Selectable Baud Rates from 75 bps to 1 Mbps
  • -40°C to +65°C (-40°F to +149°F) Operating Range
  • MIL-STD-901D Grade A for High Impact Shock
  • MIL-STD-167B for Vibration
  • MIL-STD-461E for Electro-Magnetic Interference (EMI)
  • Supports Hot Swapping
  • Significantly faster microprocessors and increased memory
  • Cyber security enhancements including secure boot with firmware and configuration validation, intrusion detection, role-based authentication control (RBAC), hardware validation, encrypted files/communication, trust groups, and historical logging with evidence of critical events
  • USB ports that may be used for configuration and/or computer-less programming
  • Module expansion port for installation of optional features such as two-port Ethernet in any module

The Chameleon RS-485 Network Interface Module (NIM-1+) offers high-speed communications using FairNET, Modbus ASCII (master and slave), Modbus RTU (master and slave), Custom ASCII, or Custom Binary protocols. FairNET provides both deterministic and non-deterministic messaging, automatic bus mediation, and a robust master-slave architecture.

You can network up to 256 NIM-1+ modules and achieve data rates as high as 1 Mbps. NIM-1+ units have built-in biasing and termination circuitry for easy and reliable network configuration.

As with all Chameleon modules, NIM-1+ units are hot-swappable: to replace one, you can simply swap the front panel (with attached processing board) and the unit is back online—there is no need to shut off the power and there is no need to detach connectors. It is powered by a modern cyber-secure processor with computational power to handle the most demanding applications. They also provide unequaled ruggedness. They are specifically designed for sustained operation in severe environments, including those characterized by extreme shock, vibration, electro-magnetic interference, temperature, and/or humidity. The fully-sealed enclosure (sealing end-caps not pictured) ensures long-lasting operation in the grimiest settings.

Operating Ambient Temperature Range -40°C to 65°C
Storage/Transport Ambient Temperature Range -40°C to 85°C
High Impact Shock MIL-STD-901D, Grade A
Mechanical Vibration MIL-STD-167B, 0-50Hz
Electro-Magnetic Interference MIL-STD-461E
Facial/Housing Protection NEMA 1,2,4,4X,5,6,12,12K,13
Maximum Power Consumption 2.8W
Network Capacity One module can drive 32 standard RS-485 unit loads or 256 NIM-1 modules
Network Capacity 256 NIM-1 modules can be driven by a standard RS-485 transceiver
Max Baud Rate 1 Mbit / Second
Electrostatic Discharge Protection +/- 15 KV Human Body model
Signal Electrical Isolation from Control Circuitry 1500 VDC
Cable Fault Protection No spurious signals on receiver inputs if network cable is open or shorted
Biasing On-board 470Ω high and low
Termination On-board 110Ω
Supported Cable Diameters Two glands 0.24”-0.47”; two glands 0.16”-0.31”
Supported Wire Gauges 16-28 AWG
Status Readout One three-color (red/yellow/green) LED Indicator
IR Wireless Interface 115kbps SIR
Weight 1.3 lbs
Front Panel Dimensions 2.5” W x 6” L
Enclosure Height 3″H

The following part numbers can be used when ordering the Network Interface Module Type 1+ (NIM-1+).

Fairmount Part Number Description
01012-402 NIM-1+ with Gray Enclosure
01012-702 NIM-1+ with Black Enclosure (without Stuffing Tubes)
01014-402 NIM-1+ Half-Size Gray Enclosure with Wiring Hub Assembly
01014-702 NIM-1+ Half-Size Black Enclosure and Wiring Hub Assembly (without Stuffing Tubes)
11132-200 NIM-1+ Active Board and Gray Cover
11132-250 NIM-1+ Active Board and Black Cover