DPI-AL-Series

Supported Applications

The Omega DPi-AL Series comprises temperature and process meters with alarm outputs, designed for universal input measurement in industrial environments. These instruments support thermocouple (ITS 90), RTD (ITS 68), analog voltage, and analog current inputs to monitor process variables directly on the front panel.

Documented applications include:

• Process Measurement: Monitoring temperature via J, K, T, E, R, S, B, C, N, L (J DIN) thermocouples and Pt sensors with 2-, 3- or 4-wire configurations.
• Analog Signal Conditioning: Measuring voltage inputs from 0 to 100 mV, 0 to 1 V, and 0 to 10 Vdc; current inputs of 0 to 20 mA (5 Ω shunt).
• Alarm Monitoring: Providing two relay outputs for high/low, above/below, band, latch/unlatch, normally open/normally closed, and process/deviation alarm operations.

Operating Conditions & Performance

The DPi-AL Series operates within an ambient temperature range of 0 to 55°C (32 to 131°F) with a humidity rating of 90% RH non-condensing. The meters feature front removable and plug connectors for electrical connection.

Performance specifications include:

• Accuracy: ±0.5°C temperature; 0.03% rdg.
• Reading Rate: 3 samples/s.
• Temperature Stability: RTD: 0.04°C/°C; Thermocouple @ 25°C (77°F): 0.05°C/°C with cold junction compensation; Process: 50 ppm/°C.
• Input Impedance: 10 MΩ for 100 mV, 1 MΩ for 1 or 10 Vdc.
• Thermocouple Lead Resistance: 100 Ω maximum.

The series includes a built-in excitation of 24 Vdc @ 25 mA, which is not available with the low power option. Approvals include CE and UL US, backed by a 5 YEAR WARRANTY.

Enclosure Ratings & Dimensions

• 1/8 DIN (DPi8-AL): NEMA 1/Type 1 front bezel; dimensions: 48 H x 96 W x 127 mm D (1.89 x 3.78 x 5").
• 1/16 DIN (DPi16-AL): NEMA 4X/Type 4 (IP65) front bezel; dimensions: 48 H x 48 W x 127 mm D (1.89 x 1.89 x 5").
• 1/32 DIN (DPi32-AL): NEMA 4X/Type 4 (IP65) front bezel; dimensions: 25.4 H x 48 W x 127 mm D (1.0 x 1.89 x 5").

Display Specifications

• 1/8 DIN: Single 4-digit 9-segment LED, 21 mm (0.83”).
• 1/32 and 1/16 DIN: Single 4-digit 9-segment LED, 10.2 mm (0.40”).

Configuration Options

The DPi-AL Series offers configurable power options to suit different installation requirements:

• Standard Power Option: 90 to 240 Vac ±10%, 50 to 400 Hz, or equivalent voltage of 110 to 300 Vdc.
• Low Voltage Power Option: Supports 24 Vac or 12 to 36 Vdc. Note: An external power source must meet safety agency approvals for this option.

The series supports two relay alarm outputs (Alarm 1 and Alarm 2) with the following ratings:

• Relay Type: SPDT, 250 Vac or 30 Vdc @ 3 A (resistive load).
• Configuration: Front panel programmable for high/low, above/below, band, latch/unlatch, normally open/normally closed, and process/deviation modes.

Sensor inputs are configurable across the series to accommodate:

• RTD Input (ITS 68): 100/500/1000 Ω; Pt sensor with 2-, 3- or 4-wire connections and 0.00385 or 0.00392 curves.
• Thermocouple Types (ITS 90): J, K, T, E, R, S, B, C, N, L (J DIN).

Key Product Differences

The DPi-AL Series is distinguished by three physical form factors and two power supply configurations:

• DIN Size 1/8: Models such as DPi8-AL (90 to 240 Vac) and DPi8-AL-DC (12 to 36 Vdc). Features a larger display of 21 mm (0.83”) and NEMA 1/Type 1 front bezel protection.
• DIN Size 1/16: Models such as DPi16-AL (90 to 240 Vac) and DPi16-AL-DC (12 to 36 Vdc). Features a display of 10.2 mm (0.40”) and NEMA 4X/Type 4 (IP65) front bezel protection.
• DIN Size 1/32: Models such as DPi32-AL (90 to 240 Vac) and DPi32-AL-DC (12 to 36 Vdc). Features a display of 10.2 mm (0.40”) and NEMA 4X/Type 4 (IP65) front bezel protection.

All variants include two relay outputs with alarm functionality. The low power option models are identified by the "-DC" suffix in the model number guide, supporting 12 to 36 Vdc or 24 Vac inputs where standard models support universal AC/DC voltage ranges.