Series-LCI308-LCI408

Supported Applications

The Dwyer Series LCI308 and LCI408 are 1/8 DIN panel meter indicators designed for process measurement, temperature monitoring (Thermocouple & RTD), frequency counting, load cell weighing, and potentiometer inputs. The series accommodates a broad range of industrial sensing requirements within a standard footprint.

Documented input types include:

• Temperature: Types J, K, T, R, S, E Thermocouples; 100 Ohm Pt RTDs (0.00385 DIN and 0.00392 NIST).
• Process Signals: ±10 VDC, ±20 mVDC.
• Frequency/Counter: Digital inputs from 0.1 to 25,000 Hz.
• Potentiometer: Resolution up to 0.001% (LCI408).
• Load Cell: ±30 mVDC with included excitation power supply.

Operating Conditions & Performance

The series operates on a 115/230 VAC, 50/60 Hz ±10% power supply. The front panel carries a NEMA 4X (IP66) rating and the unit weighs 8 oz (250 g). Accuracy specifications vary by input type:

• Process Inputs: ±0.1% of reading (+2 count).
• Thermocouples: ±0.4% of reading for types J, K, T, & E; ±0.05% of reading for types R & S.
• RTD Inputs: ±0.2% of reading.

The LCI308 features a 4 3/4 digit display scalable to ±32,000 counts, while the LCI408 provides a full 5-digit display scalable between -99,999 and +99,999. The dual-display capability on the LCI408 allows simultaneous viewing of the measured value plus other values such as peak or valley.

Input Ranges by Sensor Type

• Type J Thermocouple: -58.0 to +1472.0 °F (-50.0 to +800.0 °C)
• Type K Thermocouple: 58.0 to +2282.0 °F (-50.0 to +1250.0 °C)
• Type T Thermocouple: -328.0 to +752.0 °F (-200.0 to +400.0 °C)
• Type R Thermocouple: +32.0 to +3182.0 °F (0.0 to 1750.0 °C)
• Type S Thermocouple: -58.0 to +3182.0 °F (-50.0 to +1750.0 °C)
• Type E Thermocouple: -58.0 to +1832.0 °F (-50.0 to +1000.0 °C)
• 100 Ohm Pt, 0.00385 DIN RTD: -328 to 1472.0 °F (-200.0 to +800.0 °C)
• 100 Ohm Pt, 0.00392 NIST RTD: -328 to 1607 °F (-200 to +875 °C)

Configuration Options

The series supports a wide array of configurable options for output, communication, and control. The LCI408 model offers universal input capability covering all process, temperature, load cell, and potentiometer inputs found in the LCI308.

Output & Communication Options

• Relay Outputs: LCIA-01 (Dual Relay Card: 2 SPDT relays, 8A @ 240 VAC); LCIA-02 (Quad Relay Card: 4 SPST relays, 0.2A @ 240 VAC).
• Transistor Outputs: LCIA-03 (Four NPN optically coupled transistors, 50 mA @ 50 VDC max); LCIA-04 (Four PNP optically coupled transistors, 50 mA @ 50 VDC max).
• Analog Retransmission: LCIA-05 provides selectable 4 to 20 mADC or 0 to 10 VDC output.
• Digital Outputs: LCIA-07 BCD Parallel Output (Tri-state logic for 5 V TTL or 24 VDC signals).
• Serial Communication: LCIA-08 (RS-232) and LCIA-09 (RS-485), both supporting Modbus® Protocol with selectable ISO1745 (ASCII). Baud rates of 1200 or 19200 are available.
• Converter: MN-1 Mini-Node™ USB/RS-485 converter.

Mechanical & Electrical Specifications

• Cutout Dimensions: 3-25/32 in [96.04 mm] width x 1-57/64 in [48.02 mm] height.
• Mounting Depth: 4-31/32 in [126.25 mm].
• Display: 5 digit, 7 segment, 14 mm red with fixed decimal point; includes 14 LEDs for programming and control.
• Input Impedance (Load Cell): 100 MΩ for 300 mV, 1 MW for 30 mV.

Key Product Differences

The primary distinction between the two models lies in display resolution and input universality. The LCI308 is configured as a process indicator with inputs including ±10 VDC, ±20 mADC, and Potentiometer, offering a 4 3/4 digit display scalable to ±32,000 counts.

The LCI408 serves as the universal input model. It accepts all Process, Temperature (T/C & RTD), Load Cell, and Potentiometer inputs supported by the series. The LCI408 features a full 5-digit display scalable between -99,999 and +99,999 counts.

Both models share identical physical dimensions, power requirements (115/230 VAC), front panel ratings (NEMA 4X/IP66), and the same suite of optional output cards. The LCI408 is specifically noted for its potentiometer resolution capability up to 0.001%.