ADI-1 - Universal Input LED Display Controller

What Is the ADI-1 Universal Indicating Unit?

The KOBOLD ADI-1 is a universal input LED display controller that converts current, voltage, and frequency signals into simultaneous bar graph and digital readouts with two built-in alarm relays. Engineered for industrial environments demanding reliable signal monitoring, it combines a high-visibility 55-point LED bar graph with a 5-digit digital display to deliver instant process status at a glance.

Transform complex process signals into clear, actionable visual data — the ADI-1 accepts most standard transducer output signals and displays them without external signal conditioning, in panel-mount or field-mount housings.

Advanced Display Technology for Critical Applications

The ADI-1 provides simultaneous analog and digital visualization: a circular 270° bar graph with 55 LEDs for intuitive trend monitoring, plus 14 mm (0.55 in) high red LED digits designed for readability from distances up to 16.4 ft (5 m), even in challenging lighting conditions.

The ADI-1 excels where standard indicators fall short, helping operators identify trends and anomalies faster. The bar graph is freely scalable and can be configured as forward bars, reverse bars, bars from the middle, or dot display, with a programmable display time of 0.1 to 10 seconds. Min/max memory captures process extremes for quality documentation, and display flashing can be assigned as an additional visual alarm.

Universal Signal Inputs and User Scaling

The ADI-1 accepts 0-20 mA, 4-20 mA, 0-5 V, and 0-10 V analog signals, or frequency inputs from 0.01 Hz to 100 kHz, according to specifications. User scaling and programming are handled entirely through four front buttons — no software or external tools required.

User-configurable scaling with 30 linearization points accommodates non-linear sensors without external signal conditioning, eliminating the need for multiple display units in complex control panels. A programming interlock with user and master codes prevents unauthorized parameter changes.

Alarm Relays and Optional Analog Output

Two programmable relay outputs with changeover contacts handle up to 250 VAC / 5 A (resistive) or 30 VDC / 5 A loads, enabling direct control of alarms, pumps, or valves without additional relay modules. Independent hysteresis and switching delays for each alarm help prevent nuisance tripping from signal noise.

An optional galvanically isolated analog output retransmits the process value as 0-20 mA or 4-20 mA (load <360 Ω) or 0-10 VDC (load >10 kΩ), with an output error of 0.1% of full scale according to specifications.

Built for Demanding Industrial Environments

With IP65 front panel protection and field-housing operating temperatures from -4°F to 140°F (-20°C to 60°C) with the standard power supply, the ADI-1 is designed to maintain reliable performance where moisture, dust, and temperature extremes challenge standard instrumentation.

The panel-mount version uses a glass-fiber-coated Noryl housing with EPDM sealing, while field housing versions use powder-coated aluminum and PA 66 construction, resisting the chemical exposure common in process industries. Panel-mount versions operate from 32°F to 122°F (0°C to 50°C).

Installation Flexibility and Integration

Choose between a 96 x 96 mm (3.78 x 3.78 in) panel-mount housing for control room integration, or field housing options with finely rotatable wall mounting or pipe mounting for 2-inch piping at the point of use. Pluggable terminal connections accepting wire sizes up to 2.5 mm² simplify installation and maintenance.

An optional sensor power supply (24 VDC / max 50 mA, 12 VDC / max 20 mA, or 5 VDC / max 20 mA) directly powers 2-wire transmitters, reducing wiring complexity and component count. The integrated totalizer function with configurable time base enables flow totalization and batch counting applications without external counters.

Specifications That Deliver Performance

• Display accuracy: ±0.1% of measuring range ±1 digit for current/voltage inputs; 0.05% ±1 digit for frequency inputs
• Update rate: adjustable 0.1 to 10 seconds for optimal response
• Display range: -19999 to +19999 with programmable decimal point
• Memory retention: EEPROM storage preserves configuration without battery backup
• Power options: 100-240 VAC/VDC, or 18-30 VAC / 10-40 VDC

Sample Applications Across Industries

The ADI-1 serves critical monitoring needs in water treatment facilities tracking flow rates and tank levels, manufacturing plants monitoring pressure and temperature, HVAC systems displaying differential pressures, and chemical processing operations requiring precise batch control. The versatile configuration accommodates virtually any 4-20 mA or voltage-output sensor in your facility.

Common Questions for Universal Input LED Display Controller