Define Merlin - Universal Input Digital Indicator

With no buttons to worry about, the Merlin is designed for hassle-free setup via USB, preventing accidental changes during handling. Its wide voltage range suits both AC mains and 24V DC applications, making it a truly global solution.

The Merlin is built tough, with an IP65 sealed bezel and extensive testing of noise effects to and beyond CE requirements, making it perfect for industrial environments.With a large, 0.8″ super-bright LED display, you can be sure of clear data visibility in any application.

For even more control, the Merlin R2A model includes two relays for alarms and control functions, along with a 4-20mA output for seamless retransmission to PLCs and SCADA systems.

Universal input – software selectable!
Thermocouple, RTD, NTC, mA, V, mV, potentiometer, digital pulse and AC current sensors.

Universal AC/DC power supply
Accepts 24-250V AC or 19.5-250V DC – no header adjustments required.

Excitation supplied
22V excitation to power 2-wire transmitters without an external power supply.

Optional relay outputs
Ideal for alarming and simple on/off control.

Optional isolated 4-20mA output
Ideal for use as a PLC/SCADA accessory.

Easy, USB powered programming
Configure without a power supply, for lighting-fast commissioning.

• mA, V, RTD, TC, NPN/PNP, potentiometer, & AC inputs
• Optional 2 relay outputs & 4 to 20mA analog output
• 1/8 DIN panel mount
  • Only requires 80mm behind panel
• Program using free Define ToolBox software download
  • Requires a USB Bridge Key
• Designed to withstand harsh industrial environments
  • IP65 sealed bezel
  • UL Listed & CE approved
• 5-year guarantee

• General Specifications
• 1x Universal input Accepts Thermocouple, RTD, NTC, Current, Voltage, Digital Pulse, Potentiometer & AC Current sensor See below for full specifications for each input type
• Universal power supply 24-250V AC / 19.5-250V DC, 47-63Hz, 6VA max
• Isolation 2,300Vrms for 1min to all inputs and outputs
• Programming
• Define ToolBox USB programmable using Define ToolBox (Bridge Key required)
• Construction
• Casing Panel mount enclosure. Installation Category II, Pollution Degree 2. Flame resistant. Panel gasket and mounting clips included.
• Ingress protection rating IP65 indoor use. (Face only, when mounted according to manufacturer’s instructions)
• Dimensions (H x W x D) 1.89 x 3.74 x 2.44″ (48 x 95 x 62 mm)
• Weight 6.87oz (195g)
• Cutout area 1.77 x 3.62″ ±.02 (45 x 92mm ±.5)
• Space behind panel 3.15″ (80mm) minimum space required behind panel (includes space for connectors/wiring)
• Display
• Display type 0.8″ (20mm) red LED, 7-segment characters
• LED indicators 2 x setpoint indicator LED’s (R2A model only)
• Digits 4
• Full scale range -1999 to 9999
• Environmental Conditions
• Operating temperature 14 to 122°F (-10 to 50°C)
• Storage temperature -4 to 140°F (-20 to 60°C)
• Operating humidity 5-85%RH max (non-condensing)
• Altitude Up to 2,187yd (2,000m)
• Certifications & Compliances
• EN 61326-1 Immunity to Industrial Locations
• Emission CISPR 11 Class A (EN 61326)
• Safety requirements for electrical equipment for measurement control and laboratory use EN 61010-1 General Requirements, EN 61010-2-030 Particular Requirements for Testing and Measuring Circuits
• UL listed File Number E473114