Product Brochure & Pricing

L91 Series Brochure.pdf

Price Page L91 1-2006V.pdf


L91 Series Manual

L91 1/16 DIN Manual 03-2006.pdf


Warranty: 3-Years

L91 3-Year Warranty.pdf


Control Comparison:

100, 300, B, C, P, L & 90 Series

Single Loop Control Comparison.pdf (25KB)

Product Line Review Brochure:

FDC_Product_Line_Review.pdf (415KB)


DIN Rail Mount Accessory.pdf

DIN Rail Mount Accessory Price Page.pdf

L Series Limit Control Features.htm

DIN Mechanical Accessories.htm

DIN Communication Accessories.htm


Additional Information

EnVision SCADA Software.html (FREE Software)

Enclosure Dimensions - DIN controls.htm

Terminal Covers.pdf

DIN Control Series - Feature Comparison.pdf

DIN Controls Output Module Part #.pdf

Price Sheet DIN Controls Output Modules.pdf

OEM Private Branding.htm

L91 Series Modbus Parameters.pdf

RS232/485 Converter for PC communication.pdf


Agency Approvals

UL Approval.pdf

UL _Conditions_of_Acceptability_(CoA).pdf

CSA Approval.pdf

CE Conformity.pdf

RoHS Compliance.pdf



Need single & multiloop controls and Data Acquisition system?


nCompass Series Operator Interface & Data Acquisition Systems for100/C, 300, B41, B42, L, & P Series Controls and FDC IO modules

nCompass Single & Multiloop Control System

Windows CE embedded Operator Interface and Data Acquisition offering 4.3" and 7" touch screen displays supporting up to 15 loop controls, 15 monitor points with up to 16 DI and 32 DO for user configurable control outputs, sequencing & logic.

Go to nCompass Page.htm


EnVision PC Based Data Acquisition

A FREE PC based SCADA software offers unrivaled flexibility for remote SCADA access to up to a mix of 128 devices.


Devices include Future Design Controls loop, IO and Orion-M iSeries control systems.

Go to EnVision Page.htm


L91 FM Approved Temperature Limit Control:

$180 List

Future Design Controls FM Approved L91 is a 1/16 DIN control designed to provide limit protection in process applications where FM approvals are required. With up to three discreet setpoints, two outputs, fast scan rates, 3-Year Warranty and user friendly prompts make the L91 the right choice for safety protection.


The L91 offers a full range of universal thermocouple & RTD inputs with latching output selections for mechanical Relay, SSR Drive or Triac.


Optional features such as a second relay output, DC Transmitter power supply, remote reset, linear mA/VDC retransmission or RS485 communications offer maximum flexibility for demanding applications. Click here for more information on retransmission & communication options.


The L91 display is configurable for PV, HSP, LSP SP2 or SAFE offering the simplicity required by operations personnel. For more information - Limit Control Features.

Additional Limit Control Features include 2nd relay output configurable as latching or non-latching, alarm silence mode, configurable display decimal point, F/C, input filter factor and more. Click here to learn more about these Limit Control Features.

Agency Approvals include FM, UL Component Recognition, CSA (as a limit control), CE and RoHS compliant. (FM Approval applies to units with accepting thermocouple or RTD inputs, not linear mA or VDC.)

Like FDC's other DIN control platforms, PC Configuration Software, very shallow mounting depth and OEM or Distributor Private Branding are available.

FREE EnVision PC Based SCADA Software


EnVision, a FREE PC based SCADA software offers unrivaled flexibility for remote SCADA access to up to a mix of 128 devices including loop controls, 8-channel analog input modules and Orion-M iSeries control systems.

  • Data Logging: Each of the 128 devices, whether a mix of L91's or other Future Design products, can have their data saved to the hard disk at user-defined rates. With up to 129 concurrent data log files, EnVision offers unparalleled data logging flexibility. Data file analysis tools (digital and trend) make looking at schedule run data a simple task

Specification Review

  • Power Input:
    • 90-264VAC
    • 11-26 VAC/11-36 VDC optional
  • Input sample rate - 5 scans/second
  • Input:
    • Universal Thermocouple & RTD
      • Special Order linear mA/VDC [FM approval applies only to units with thermocouple or RTD input]
    • Event Input - Optional: Configurable as a Remote Reset or to Lock all parameters.
  • Limit Control Output #1 - Latching:  Configurable as High Alarm, Low Alarm or combination High-Low Alarm Setpoint with one digital output. Available Digital Outputs:
    • Relay: 2A/240 VAC resistive Form C [spdt]
    • ssr driver: 5VDC/30mA
    • Triac: 1A/240 VA
  • Output #2 is available with one of the following options: Digital Output [relay, triac or ssr driver] transmitter power supply, communications and Event Input for remote reset & Lock.
    • Digital Outputs are same as output #1 except relay is Form A [spst].
    • Transmitter Power Supply [Isolated];
      • 20 VDC/25mA
      • 12 VDC/40mA
      • 5 VDC/80mA
    • Linear Retransmission:
      • Process or Setpoint Values
      • 0-5/1-5/0-10 VDC, 0-20/4-20mA
    • RS485 Modbus Communication with access to all parameters.
  • Configurable Display when not in alarm condition HSP, LSP, SP2, PV and word SAFE.
    • When in Alarm display defaults to PV with output 1 annuciator energized.

Process & Temperature Control Page.htm


For other FM Approved High Limit Controls

Limit Controls Page.htm


FM Approved Series 7L DIN Rail Mount and L41 1/4 DIN Limit Controls

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Future Design Controls   888.751.5444