Magna Series Large Digit Display 2 inches (57 mm), 4 Digit Display

Magna Series Large Digit Display 2 inches (57 mm), 4 Digit Display

Price: $990.00
  • P/NM24-MCR-MT2
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Features

  • 2-1/4 inch (57 mm) digit height
  • 4 digits with period or color dividers
  • Choice of normal or outside viewing brightness
  • Choice of signal inputs and functions
  • Choice of panel mount, wall mount or suspension mount
  • Choice of 95-264 Vac or 11-30 Vdc power
  • Sealed to NEMA-4 (IP65)
  • Only 3.0" (75 mm) deep
  • Programmable from front panel
  • Optional two or four 2A relay outputs, analog output, serial I/O

The Magna Series Large Digit Display with a 2-inch (57 mm) 4-digit configuration is a rugged industrial display engineered for clear data visualization. Featuring solid-segment LEDs for indoor use or optional 5 mm LEDs for outdoor brightness, it supports inputs including RS232/RS485, 4-20 mA, 0-10V, and pulse (0-100 kHz), with a 24V excitation output, 10-point linearization, and digital filtering (0-25s). It includes two or four 2A relays and an analog output, operating on 95-264 Vac or 11-30 Vdc, with an IP65 (NEMA-4X) seal and a temperature range of -40°C to 70°C, plus a heater option. Ideal for production monitoring and process control, it offers customizable LED colors and flexible mounting options.

Viewing distances up to 320 ft (100 m) are achieved with 8" digits. A rule of thumb is that viewing distance in feet is 40 times digit height in inches, or in metric terms, that viewing distance in meters is digit height in millimeters divided by 2.

Four digit heights are available a standard: 57 mm (2-1/4"), 102 mm (4.0"), 150 mm (5.9"), and 200 mm (7.9"). Solid segments are used for normal brightness 2.2" and 4.0" digits. Individual 5 mm LED pixels are used for larger digits and outdoor brightness versions. The number of digits can be 4, 6 or 8, depending on the display function.

Indoor or outdoor viewing: MAGNA Series Displays with normal brightness LEDs can be read over a machine or across a plant floor. Displays with outdoor brightness LEDs can be read across an industrial yard, parking lot or roadway, for example to display vehicle load. A heater option allows outdoor operation in winter in cold climates. Available mounting options are panel mount, wall mount and suspension mount. Environmental sealing to IP65 (NEMA-4X) is standard.

Choice of signal inputs: MAGNA Series Displays are available for different signal types, with can each be associated with 4 or 6 digits. Please click on the links below for detailed information by signal type:

Options available include two or four 2A relays, an analog output, an RS232 or RS485 serial data, and 95-264 Vac or 11-30 Vdc power.

Intuitive setup is normally provided by means of built-in front panel switches, which can be locked. It is also possible to remotely wire four pushbuttons to the display.

MAGNA Series Serial Input Large Digit Displays
Standard Large Digital Displays are available here. Prices are in US dollars and do not include shipping or duty charges (export sales). 

Questions about your order? Please email  our support@laurels.com
MAGNA units are built to order. MAGNA orders are non-cancelable and non-returnable.

Customized large digit displays are available by special quotation:

  • LED colors green, blue, white, yellow (not limited to red).
  • Digit heights of 12", 16", 24" or 32" (not just4", 6" or 8").
  • 2 or 4 solid state relays (not just mechanical relays).
  • Stainless steel housing (for food processing and pharmaceutical industries).
  • Explosion-proof stainless steel housing rated for ATEX Zones 2 and 22 (equivalent to Class1 / Div 2).
  • Custom signs with different colors, with fixed captions, and with multiple numeric display windows.

magna input boards

magna analog boards

        Magna Serieal Boards

Serial Data Input
Serial Data Types RS232 or RS485 (specify at time of order)
Serial Connector Detachable plug-in screw terminals
Displayed Information ASCII: Displays any character within 7-segment display limitations. Quant: Displays only numeric ASCII values.
  Qa.Tot: Quantity totalizer. Can be used to accumulate weight values, for example after each batch. Uses a contact closure to trigger addition.
Baud Rate 300 to 115200 baud
Data Format 701, 7e1, 7n2, 801, 8e1, 8n1, 8n2
Termination Character Hex 00 to FF
Reject Characters Counted from termination character
Addressing 00 (wildcard) to F7
Process Signal Input
A/D Converter 20-bit resolution
Current Signal Types 0-10 mA, 0-20 mA, 4-20 mA with 33Ω input resistance
Voltage Signal Types 0-5V, 1-5V, 0-10V with 1 MΩ input resistance
Accuracy ± 0.05% of range.
Tempco, Scale ± 25 ppm/°C
Tempco, Offset ± 30 ppm/°C
Excitation 24 Vdc up to 40 mA, or ratiometric 0-10V for slide-wire
Strain Gauge / Load Cell Input
A/D Converter 20-bit resolution
Signal Gain Suitable for 0.5 mV / V to 4 mV / V load cells
Accuracy ± 0.05% of range.
Tempco, Scale ± 25 ppm/°C
Tempco, Offset ± 30 ppm/°C
Excitation Output Isolated 10V up to 120 mA to power up to four 350Ω load cells in parallel
Pulse Input for Frequency, Rate, Total
Number of Inputs 4
Signal Types Configurable for contact closures, NPN or PNP proximity switches, 5V logic pulses, 24V pulses, quadrature
Debounce Programmable to eliminate false counting from contact bounce.
Timing Reference Temperature-controlled quartz crystal.
Pulse Input for Clock Operation
Time Reference Precision, temperature-compensated quartz crystal.
Clock Format HH:MM or HH:MM:SS
Display
Number of Digits 4 or 6
Digit Height 57 mm (2-1/4"), 102 mm (4.0"), 150 mm (5.9"), or 200 mm (7.9")
Digit Color Red
Brightness Variable
Brightness 8.8.8.8. or 8.8.8.8.8.8. (standard)
Clock Format HH:MM or HH:MM:SS (optional, specify at time of order)
User Controls
Scaling Digital direct or theoretical scaling with scale & offset.
Filtering Digital filtering, time constants adjustable from 0 to 25 sec.
Rounding Selectable last-digit rounding of 1, 2, 5, 10, 20, 50 units.
Linearization Up to 10 points, direct or theoretical calibration.
Logic Inputs
Font Panel Controls Calibration, Tare, Reset, Max/Min, Alarms
Logic Functions Three logic inputs, individually configurable for Hold, Reset, Tare, Peak / Valley, Net/Gross, Memory Address.
Logic Levels Normally open, NPN or contact closure input to activate.
5V open circuit, 1 mA switched current.
Power
AC Power (standard) 100-240 Vac
DC Power (option) 11-30 Vdc
Max Consumption 30 VA
Analog Output Option
Output Levels 0-20/4-20 mA into 0 to 500Ω, 0.4 μA resolution. 0-10V into loads > 600Ω, 0.2 mV resolution. -10 to +10V into loads > 600Ω, 0.4 mV resolution.
Resolution 16 bits
Accuracy 0.1% of range
Stability 50 ppm/°Cl
Output Isolation Isolated from input and power
Scaling Digitally scalable
Special Features Can be set to operate from net or gross value.
Alarm Output Option
Relay Type Two or four relays rated 2A, 250VAC, SPDT
Special Features Adjustable hysteresis
  In-flight compensation facility.
  Energize or de-energize on trip.
  Adjustable timers to set energize and de-energize delays. Can also be set to pulse for applications needing less than 100% duty cycle.
  In-band and out-of-band alarm function.
  Manual and automatic in-flight compensation.
  Can be set to operate from net or gross value.
Serial Data Output Option
Output Types RS232 or RS485, addressable, on demand or continuous output.
Special Features Can include time and date with RTC option fitted.
Can be set to operate from net or gross value.
Environmental
Storage Temp. -20°C to +70°C
Operating Temp. 0°C to 50°C, non-condensing. -25°C to 50°C, non-condensing, with MHTR AC heater option.
Sealing IP65 (NEMA-4) standard, all-round
Connections M12 compression glands for round cable, diameter 3.0 to 6.5 mm (0.118" to 0.256")
Mounting Wall mount, suspension mount, panel mount
Approvals
Types Produced to IPC 610 Class 2 Standard
  UL ISO9001:2008 QA
Serial Data Input
Serial Data Types RS232 or RS485 (specify at time of order)
Serial Connector Detachable plug-in screw terminals
Displayed Information ASCII: Displays any character within 7-segment display limitations. Quant: Displays only numeric ASCII values.
  Qa.Tot: Quantity totalizer. Can be used to accumulate weight values, for example after each batch. Uses a contact closure to trigger addition.
Baud Rate 300 to 115200 baud
Data Format 701, 7e1, 7n2, 801, 8e1, 8n1, 8n2
Termination Character Hex 00 to FF
Reject Characters Counted from termination character
Addressing 00 (wildcard) to F7
Process Signal Input
A/D Converter 20-bit resolution
Current Signal Types 0-10 mA, 0-20 mA, 4-20 mA with 33Ω input resistance
Voltage Signal Types 0-5V, 1-5V, 0-10V with 1 MΩ input resistance
Accuracy ± 0.05% of range.
Tempco, Scale ± 25 ppm/°C
Tempco, Offset ± 30 ppm/°C
Excitation 24 Vdc up to 40 mA, or ratiometric 0-10V for slide-wire
Strain Gauge / Load Cell Input
A/D Converter 20-bit resolution
Signal Gain Suitable for 0.5 mV / V to 4 mV / V load cells
Accuracy ± 0.05% of range.
Tempco, Scale ± 25 ppm/°C
Tempco, Offset ± 30 ppm/°C
Excitation Output Isolated 10V up to 120 mA to power up to four 350Ω load cells in parallel
Pulse Input for Frequency, Rate, Total
Number of Inputs 4
Signal Types Configurable for contact closures, NPN or PNP proximity switches, 5V logic pulses, 24V pulses, quadrature
Debounce Programmable to eliminate false counting from contact bounce.
Timing Reference Temperature-controlled quartz crystal.
Pulse Input for Clock Operation
Time Reference Precision, temperature-compensated quartz crystal.
Clock Format HH:MM or HH:MM:SS
Display
Number of Digits 4 or 6
Digit Height 57 mm (2-1/4"), 102 mm (4.0"), 150 mm (5.9"), or 200 mm (7.9")
Digit Color Red
Brightness Variable
Brightness 8.8.8.8. or 8.8.8.8.8.8. (standard)
Clock Format HH:MM or HH:MM:SS (optional, specify at time of order)
User Controls
Scaling Digital direct or theoretical scaling with scale & offset.
Filtering Digital filtering, time constants adjustable from 0 to 25 sec.
Rounding Selectable last-digit rounding of 1, 2, 5, 10, 20, 50 units.
Linearization Up to 10 points, direct or theoretical calibration.
Logic Inputs
Font Panel Controls Calibration, Tare, Reset, Max/Min, Alarms
Logic Functions Three logic inputs, individually configurable for Hold, Reset, Tare, Peak / Valley, Net/Gross, Memory Address.
Logic Levels Normally open, NPN or contact closure input to activate.
5V open circuit, 1 mA switched current.
Power
AC Power (standard) 100-240 Vac
DC Power (option) 11-30 Vdc
Max Consumption 30 VA
Analog Output Option
Output Levels 0-20/4-20 mA into 0 to 500Ω, 0.4 μA resolution. 0-10V into loads > 600Ω, 0.2 mV resolution. -10 to +10V into loads > 600Ω, 0.4 mV resolution.
Resolution 16 bits
Accuracy 0.1% of range
Stability 50 ppm/°Cl
Output Isolation Isolated from input and power
Scaling Digitally scalable
Special Features Can be set to operate from net or gross value.
Alarm Output Option
Relay Type Two or four relays rated 2A, 250VAC, SPDT
Special Features Adjustable hysteresis
  In-flight compensation facility.
  Energize or de-energize on trip.
  Adjustable timers to set energize and de-energize delays. Can also be set to pulse for applications needing less than 100% duty cycle.
  In-band and out-of-band alarm function.
  Manual and automatic in-flight compensation.
  Can be set to operate from net or gross value.
Serial Data Output Option
Output Types RS232 or RS485, addressable, on demand or continuous output.
Special Features Can include time and date with RTC option fitted.
Can be set to operate from net or gross value.
Environmental
Storage Temp. -20°C to +70°C
Operating Temp. 0°C to 50°C, non-condensing. -25°C to 50°C, non-condensing, with MHTR AC heater option.
Sealing IP65 (NEMA-4) standard, all-round
Connections M12 compression glands for round cable, diameter 3.0 to 6.5 mm (0.118" to 0.256")
Mounting Wall mount, suspension mount, panel mount
Meter modifiying options (not shippable separately from meter)
MRDLV Daylight viewing brightness for operation down to 0°C (32°F) instead of normal indoor brightness.
MHTR Heater for outdoor operation down to -25°C (-13°F).
MPS2 11-30 Vdc power instead of normal 85-265 Vac power.
UM Extra case width for 2 blank digits.
Use UM for units of measure like ºC. Required with M24 for relay, analog output or serial output options. Added at no charge with MHTR for M24 or M44.
Approvals
Types Produced to IPC 610 Class 2 Standard
  UL ISO9001:2008 QA

Number of Digits & Case Dimensions

magna six digit clock
Serial Data Input 4 Digits 6 Digits
Serial Data Input
Process, Strain Gauge, Rate / Frequency,
Totalizer, Quadrature
Clock / Timer
Digit Height Case Width x Height Case Width x Height
57 mm (2.2") 280 x 155 mm (11.0" x 6.1") 376 x 155 mm (14.8" x 6.1")
102 mm (4.0") 434 x 196 mm (16.7" x 7.7") 616 x 196 mm (24.3" x 7.7")
150 mm (5.9") 580 x 247 mm (22.8" x 9.8") 820 x 247 mm (32.3" x 9.8")
200 mm (7.9") 750 x 290 mm (29.5" x 11.4") 1072 x 290 mm (42.2" x 11.4")
Case depth 75 mm (3.0")

Number of Digits & Case Dimensions

magna six digit clock
Serial Data Input 4 Digits 6 Digits
Serial Data Input
Process, Strain Gauge, Rate / Frequency,
Totalizer, Quadrature
Clock / Timer
Digit Height Case Width x Height Case Width x Height
57 mm (2.2") 280 x 155 mm (11.0" x 6.1") 376 x 155 mm (14.8" x 6.1")
102 mm (4.0") 434 x 196 mm (16.7" x 7.7") 616 x 196 mm (24.3" x 7.7")
150 mm (5.9") 580 x 247 mm (22.8" x 9.8") 820 x 247 mm (32.3" x 9.8")
200 mm (7.9") 750 x 290 mm (29.5" x 11.4") 1072 x 290 mm (42.2" x 11.4")
Case depth 75 mm (3.0")
Note:   Models with 57 mm (2.2") digits, 4 digits and 4 relays require the larger 6-digit case. For panel mount versions, add 18 mm (0.7") to case width and height for bezel and 25 mm (1.0") for cable gland in back of case.

 

MAGNA Large Digit Display Product Bulletin

 

What Is a MAGNA Series Large Digit Display, 2 Inches (57 mm), 4 Digit Display?

The Magna Series Large Digit Display is a versatile and high-performance digital display solution designed for a wide range of industrial and commercial applications. With a digit height of 2-1/4 inches (57 mm), this model offers clear and visible readings that can be easily seen from a distance, making it ideal for environments where quick and accurate data visibility is crucial.

Key Features and Specifications

1. 2-1/4 Inch (57 mm) Digit Height: The Magna Series Large Digit Display boasts a 2-1/4 inch (57 mm) digit height, providing excellent readability. This size is perfect for medium-range viewing distances, ensuring that the display is legible even from afar.

2. 4 Digits with Period or Color Dividers: This model includes four digits, each of which can be accompanied by period or color dividers, allowing for easy differentiation between numerical values or data points. This feature is particularly useful in scenarios where clarity and quick interpretation of information are paramount.

3. Choice of Normal or Outside Viewing Brightness: The Magna Series Display offers flexibility in brightness settings, with options for normal or outside viewing brightness. Whether your application is indoors or outdoors, the display can be adjusted to suit the lighting conditions, ensuring optimal visibility in any environment.

4. Choice of Signal Inputs and Functions: This display supports various signal inputs and functions, making it adaptable to different systems and requirements. Whether you need to display time, temperature, process values, or other data, the Magna Series can accommodate your needs.

5. Mounting Options: Panel, Wall, or Suspension: The Magna Series Large Digit Display is designed for versatile installation. It offers a choice of panel mount, wall mount, or suspension mount, allowing it to be installed in the most convenient and effective location for your specific application.

6. Power Options: 95-264 Vac or 11-30 Vdc: To accommodate various power environments, the Magna Series Display can operate on either 95-264 Vac or 11-30 Vdc power. This flexibility ensures compatibility with different power sources and enhances the display's adaptability to different installations.

7. NEMA-4 (IP65) Sealing: The display is sealed to NEMA-4 (IP65) standards, providing excellent protection against dust and water ingress. This robust sealing makes it suitable for harsh industrial environments where exposure to moisture and dust is a concern.

8. Compact Design: Despite its powerful capabilities, the Magna Series Large Digit Display is only 3.0 inches (75 mm) deep. Its slim profile makes it easy to install even in space-constrained environments without compromising performance.

9. Front Panel Programmability: The display is fully programmable from the front panel, allowing for easy adjustments and customization to meet specific application requirements. This user-friendly feature simplifies setup and operation.

10. Optional Relay Outputs, Analog Output, Serial I/O: For enhanced functionality, the Magna Series Display offers optional two or four 2A relay outputs, an analog output, and serial I/O. These features enable the display to interact with other systems and provide additional control and monitoring capabilities.

Viewing Distances and Application Suitability

The 2-1/4 inch digit height allows for clear viewing up to 90 feet (27 meters). For applications requiring longer viewing distances, Magna Series displays are available with larger digit heights, with 8" digits achieving viewing distances of up to 320 feet (100 meters). The rule of thumb is that viewing distance in feet is 40 times the digit height in inches, or in metric terms, viewing distance in meters is digit height in millimeters divided by 2.

Applications of Magna Series Large Digit Displays with a 2-inch (57 mm) and 4-digit configuration

The Magna Series Large Digit Display, with a 2-inch (57 mm) and 4-digit configuration, offers a versatile and reliable solution for a variety of visibility needs. Its adaptability to both indoor and outdoor environments makes it a valuable asset across numerous industries. Here's a closer look at where and how these displays are commonly used:

1. Industrial Facilities

Indoor Environments:

  • Machine Monitoring: Magna Series Displays are ideal for use over machines within industrial plants. Their bright LEDs ensure clear visibility, allowing operators to monitor crucial metrics such as machine status, production counts, or process variables from a distance.
  • Floor Management: In large manufacturing or processing plants, these displays can be mounted strategically to provide real-time information, enhancing operational efficiency and workflow management.

Outdoor Environments:

  • Industrial Yards: With the option for outdoor brightness LEDs, these displays are effective for use in expansive industrial yards. They can be utilized to show load weights, equipment status, or other critical data across large distances.
  • Parking Lots and Roadways: The Magna Series Displays are also suited for large-scale outdoor applications such as parking lots and roadways. For instance, they can display vehicle load information or other pertinent details to drivers and personnel.

2. Transportation and Logistics

Vehicle Load Display:

  • In transportation and logistics sectors, these displays can be employed to show the load capacity of vehicles, ensuring that operators are aware of the weight limits and making informed decisions about cargo distribution.

Traffic Management:

  • Magna Series Displays can be mounted along roadways to convey information such as traffic conditions or load limits. Their ability to remain visible in various lighting conditions makes them a practical choice for outdoor traffic management systems.

3. Construction Sites

Equipment Status:

  • On construction sites, these displays can be used to monitor and display the status of equipment, such as cranes or excavators. Their durability and outdoor capabilities make them suitable for harsh construction environments.

Operational Alerts:

  • They can also serve to provide operational alerts and critical information to site managers and workers, helping to ensure smooth operations and timely responses to any issues.

4. Cold Weather Operations

Winter Operation:

  • For regions experiencing cold climates, the Magna Series Displays can be equipped with a heater option, allowing them to function effectively even in winter conditions. This makes them suitable for outdoor applications in colder areas where consistent readability is essential.

5. Versatile Mounting Options

Flexible Installation:

  • The Magna Series offers various mounting options, including panel mount, wall mount, and suspension mount. This flexibility allows for easy integration into different environments and ensures that the display can be positioned for optimal visibility based on specific needs.

Conclusion

The Magna Series Large Digit Display excels in providing clear, readable information across diverse settings, from industrial facilities and transportation hubs to construction sites and outdoor environments. Its adaptability to both indoor and outdoor applications, combined with its robust features like environmental sealing and optional heating, makes it a versatile tool for improving operational visibility and efficiency.

Frequently Asked Questions About This Model

Is the 2-1/4" model the smallest MAGNA display available, or are there smaller options?

Within the MAGNA Series, 57 mm (2-1/4") is the smallest of the four standard digit heights; for applications needing an even more compact footprint, Laurel's standard (non-MAGNA) digital panel meters and displays are a separate product line worth considering.

I'm ordering this with four 2A relays — does that change the case size?

Yes — per the case dimension notes, a 57 mm (2.2") digit height configured with 4 digits and 4 relays requires the larger 6-digit case rather than the standard 4-digit case, since the relay board needs the extra internal width; this is worth accounting for when planning panel cutout dimensions if the 4-relay option is being ordered.

Is this model a cost-effective choice compared to the larger digit heights?

Generally yes — the 2-1/4" digit height is the lowest-priced option in the MAGNA Series lineup at a given digit count and signal input configuration, making it the natural choice whenever its shorter viewing distance is sufficient for the application.

Is 90 feet of viewing distance enough for a typical machine-mounted display?

For displays read by an operator standing at or near the machine, or viewed across a single production cell, 90 feet is usually more than sufficient; the shorter range only becomes a limitation when the display needs to be read from across a large open floor or from a distant vantage point.

Can I add a unit-of-measure label to this 4-digit model?

Yes, using the UM option, which adds case width for two blank digit positions — commonly used to show a unit like °C alongside the four numeric digits; note that on the 57 mm/4-digit/4-relay configuration, the case is already the larger 6-digit size, which affects how much extra room the UM option adds relative to that base.

Does the compact case size limit which signal input types this model supports?

No — all MAGNA signal input types (serial data, process signal, strain gauge/load cell, temperature, pulse/frequency, and clock/timer) are available regardless of digit height, so the 2-1/4" model has the same input flexibility as the larger models, just in a smaller enclosure.

If I might need more viewing distance later, should I order a larger model now?

Since digit height is fixed at the time of manufacture and MAGNA units are built to order and non-cancelable/non-returnable, it's worth confirming the maximum realistic viewing distance for the installation location up front rather than assuming the 2-1/4" model can be swapped later if the distance requirement grows.

Is this 4-digit model wide enough to fit in a tight panel space where the 6-digit version wouldn't?

Yes — at 57 mm digit height, the 4-digit case is 280 x 155 mm compared to 376 x 155 mm for the 6-digit case, a meaningfully narrower footprint that matters in space-constrained panel layouts where only four digits of data are actually needed.

Does this smaller model have a shorter warranty than the larger MAGNA displays?

No — the 3-year parts and labor warranty applies across the MAGNA Series regardless of digit height or digit count.

What's the typical use case where the 2-1/4" 4-digit model is the right choice over a 6-digit or larger-digit model?

It fits best where the display sits close to where it's being read (over a single machine, at eye level on a wall) and the value being shown — a count, short process reading, or simple status — comfortably fits in four digits, prioritizing compact size and lower cost over long-distance visibility.

Questions From the Field

We ordered the 4-relay option and the case is bigger than the drawing we based our panel cutout on — why?

At 57 mm digit height with 4 digits and 4 relays, the unit requires the larger 6-digit case rather than the standard 4-digit case; confirming which case size applies to the specific board configuration ordered, before finalizing panel cutout dimensions, is the standard check to avoid this mismatch.

Our display is readable at the machine but a supervisor walking the floor says it's hard to make out from further away — is this normal?

Yes — at 90 feet of rated viewing distance, this model is intended for closer-range reading than the larger digit heights; if floor-wide visibility from a greater distance is actually needed, a 4" or 6" model would be a better fit than troubleshooting this unit.

We're trying to fit this display plus a unit-of-measure label into a panel cutout sized for the standard 4-digit case — will it fit?

The UM option adds extra case width beyond the standard 4-digit dimensions, so a cutout sized only for the base 280 x 155 mm case won't accommodate the UM option without modification; checking the actual ordered case width including UM against the cutout is the standard first step.

We need to swap this unit for a 6-digit version later because our data grew past four digits — can we just reprogram it?

No — digit count is a hardware configuration set at the time of manufacture, not a field-programmable setting, so accommodating more digits requires ordering a 6-digit unit rather than reconfiguring the existing 4-digit display.

Our panel space is tighter than expected and we're wondering if the 4-digit case is actually smaller than what we ordered for a similar project — how do we check?

Comparing the specific board configuration (digit count, relay count, and whether UM is included) against the case dimension table is the standard way to confirm; identical digit heights can have different case sizes depending on which options are populated, as with the 4-relay exception on this model.

We're deciding between this model and a larger digit height for a new install and don't want to overspend — how do we decide?

Measuring or estimating the actual distance from the display's mounting location to where it will be read, then comparing that against the 90-foot rated distance for this model, is the standard way to confirm whether the more compact and lower-cost 2-1/4" model will actually serve the application before paying for a larger digit height.

This unit has been reliable, but we're now asked to also feed an alarm relay from it — can this specific unit support that after the fact?

Relay output boards are populated at build time, so whether this specific unit can support an added relay depends on whether it already has an unused relay board slot; checking the original order configuration or contacting support to confirm what's populated is the standard first step before assuming a field retrofit is possible.