With the introduction of our new product line (FAC-2100+), 2023 (or while supplies last) marks the end of production for legacy FAC-2100 units (EOL Announcement). We will continue to provide technical support on all EOL products. In addition, we will continue to repair the EOL products for as long as replacement parts can be acquired.


Features and Benefits

  • Multi-Loop High-Performance Process Control
  • Versatile I/O (4-20mA, 0-10V, RTD, Discrete Logic, Relays, etc.)
  • Can be configured for Motor Control (PWM, Encoders, etc.)
  • Modbus, Custom ASCII/Binary Messaging, and Fairnet Networking
  • Prominent displays and intuitive user-interface
  • Aluminum/steel construction — fully sealed enclosure
  • -20°C to +65°C (-4°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)
  • Powerful and easy-to-use graphical programming
  • Available with mil-spec miniature cylindrical connectors

The Fairmount Automation Controller Series, Model 2100 (FAC-2100, which superseded the also now obsolete FAC-2000) is a general-purpose, highly configurable, multi-loop process controller.  Its aluminum-steel construction makes the controller extremely rugged—it is specifically designed for operation in environments susceptible to extreme temperature, humidity, pollution, corrosion, shock, and/or vibration.  To install the MIL-STD-901D Grade A shock qualified device, simply cut out the specified pattern in your console or panel and bolt the controller in — no special shock/vibration mounts, supports, or brackets are required.

The FAC-2100 digital process controller is equipped with a wide array of I/O capabilities.  It combines the analog functionality of a standard process controller, with the digital functionality normally associated with Programmable Logic Controllers (PLC).  In its standard configuration, the FAC-2100 has three analog inputs, two analog outputs, two universal digital inputs, eight standard digital inputs, two digital outputs, and four form-C relays.  Additional I/O can be added to the device through remote I/O points from our Chameleon product line.

FAC-2100 controllers are configured with the Design Pad G4 graphical programming environment.  Design Pad technology makes setting up, debugging, and fine-tuning your control scheme quick and easy.  It also allows the device to be very versatile — virtually every feature from the front-panel displays to the back-panel I/O and everything in between can be customized to fit your needs.

The user interface on the front panel of the FAC-2100 provides 2 bar graphs, 3 numeric displays, and 3 lines of scrolling alpha/numeric text.  It allows users instant access to the application-specific parameter values that were tagged as operator-adjustable in the controller’s program.  With the ‘Set Menu’ (the upper three keys) the user can easily change parameter values, tune a system, turn outputs on or off, etc.  The ‘Automatic/Manual (A/M) Menu’ (the three lower keys) allows an operator to quickly change and manipulate the A/M state of one or more control loops.

The FAC-2100 also supports various industrial networking protocols via RS-485 and/or RS-232 communication ports.  Supported protocols include 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.

Introducing FAC-2100+

This new generation of controller called FAC-2100+ was designed to replace obsolete components with modern electronic components and to incorporate new product features. We encourage all customers to begin planning a migration of existing and future installations to the next-generation FAC-2100+. This new controller will be backward compatible and feature:

  • 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
Operating Ambient Temperature Range-20°C to 65°C
Storage/Transport Ambient Temperature Range-40°C to 85°C
High Impact ShockMIL-STD-901D, Grade A
Mechanical VibrationMIL-STD-167B
Electro-Magnetic InterferenceMIL-STD-461E
Facial ProtectionNEMA 4
Housing ProtectionNEMA 4
Quantity / Resolution3 Channels / 16 Bits
Sampling Rate50Hz Maximum
Current Input Ranges Supported0-20mA, 4-20mA
Current Input Accuracy+/-40uA at 25°C, +/-100uA Over Temperature
Standard Voltage Input Ranges Supported0-20V, 0-10V, 0-5V, 1-5V, 0-2.5V
Standard Voltage Input Range Accuracy+/-36mV at 25°C, +/-86mV Over Temperature
Low Voltage Input Ranges Supported0-1V, 0-500mV, 0-250mV, 0-100mV
Low Voltage Input Range Accuracy+/-2mV at 25°C, +/-5mV Over Temperature
Resistance Input Range Supported0-2400Ω
Resistance Input Range Accuracy+/-2.4 or +/-0.4% of Reading (whichever is smaller) Over Temperature
RTD Support3 Wire, 100Ω Platinum (European or American curve), 120Ω Nickel, or Custom
RTD Accuracy+/- 1°C Over Temperature
Quantity / Resolution2 Channels / 14 Bits
Current Output Ranges Supported0-20mA, 4-20mA
Current Output Range Accuracy+/-40uA at 25°C, +/-100uA Over Temperature
Voltage Output Ranges Supported0-10V, 0-5V
Voltage Output Range Accuracy+/-40mV at 25°C, +/-100mV Over Temperature
Quantity / Type2 Channels / Opto-isolated
Input Signal Support5VDC, 28VDC (at approximately 7mA)
Single-Input Operating Modeson/off (i.e., switch), pulse counter, frequency counter
Dual-Input Operating Modesevent timer, quadrature decoder
Maximum Frequency500 KHz
Quantity / Type8 Channels / Opto-isolated
Maximum Allowable Continuous Input Voltage200 VDC or 140 VAC RMS
Maximum Allowable Voltage Spike1000V peak 1.2µS x 50µS pulse per MIL-STD-1399 Section 300
Logic High Voltage Range5-200 VDC or 24-130 VAC RMS 55-500 Hz
Minimum Input Duration for Logic High Detection4 ms
Logic Low Voltage Range0-1 VDC or 0-0.5 VAC RMS 55-500 Hz
Minimum Input Duration For Logic Low Detection56 ms
Minimum Input Current Required (AC and DC inputs)5mA RMS
Quantity / Type2 Channels / Opto-isolated Transistor
Output SIgnal SupportUp to 28VDC (40mA maximum)
Operating Modeson/off, variable frequency square-wave, pulse width modulation (PWM)
Maximum Frequency50 Hz
Quantity / Type5 Relays Maximum / Up to 4 Mechanical Form “C” Relays and up to 3 Opto-isolated Solid State Form “A” Relays
Mechanical Relay Rated Signal Range4 A (resistive) @ 24VDC or 120VAC, 2A (resistive) @240VAC
Solid State Relay Rated Signal Range3 A @ 60VDC or 140VAC
Protocols SupportedModbus RTU/ASCII (Master or Slave), Custom Binary/ASCII Messaging, FairNET (Master and Slave)
Network CapacityCan drive 32 standard RS-485 unit loads or 256 FAC-2100
Network Capacity256 FAC-2100s can be driven by a standard RS-485 transceiver
Max Baud Rate1 Mbit / Second
Electrostatic Discharge Protection+/- 15 KV Human Body model
Signal Electrical Isolation from Control Circuitry1500 VDC
Cable Fault ProtectionNo spurious signals on receiver inputs if network cable is open or shorted
BiasingOn-board 470Ω high and low
TerminationOn-board 110Ω
Numeric DisplaysTwo user-programmable 4-digit and one user-programmable 3-digit, 7-segment digital readouts (0.4″ x 0.3″)
Analog BargraphsTwo user-programmable columns of 40 LEDs (4.0″ x 0.2″)
Status ReadoutThree user-programmable 8-character displays (7×5 pixel resolution)
KeypadSix positive tactile-feel push buttons
Weight9 lbs
Front Panel Dimensions5.5” W x 8.0” H
Depth (w/o cylindrical connector shells)7.75″ D

Please refer to the following part numbers when ordering FAC-2100 controllers:

Fairmount Part NumberDescription
FAC-2100-DC-28-CDigital Controller with DC Input Power, 28VDC Output
FAC-2100-DC-28-C-RAAADigital Controller with DC Input Power, 28VDC Output, and AC Solid-State Relays

FAC-2100 Accessories:

Fairmount Part NumberDescription
30110-015EMI Chassis Ground Braid
01004-000COM1 9/25 pin D RS-232 PC Serial Cable (5ft)

FAC-2100 Spare/Replacement Parts:

Fairmount Part NumberDescription
01001-007Bezel Gasket
01001-008Flange Gasket
01001-009Side Access Panel Gasket
01001-010Connector Plate Gasket
21005-000Locking Clamp
21011-000Gasket Mounting Spacers
30130-0013 A, 250VAC, 1/4 x 1″, Slow-blow Fuse
50010-00710-32 x 1 1/4 Socket Head Cap Screw SS