DRC-8906 DIN Rail Temperature, Voltage/Current Signal Conditioners

Supported Applications

The Omega DRC-8900 Series consists of DIN rail mount signal conditioners designed for process monitoring applications. These isolated transmitters convert various input signals—including thermocouples, RTDs, DC voltage, and DC current—into standardized output signals suitable for data acquisition systems.

• Thermocouple inputs: Type J (DRC-8920) and Type K (DRC-8921)
• RTD inputs: Pt RTD with 100Ω, 500Ω, or 1000Ω resistance
• Voltage/Current inputs: DC voltage ranges from 0 to 50 mV up to 0 to 100 V; DC current ranges from 4 to 20 mA and 0 to 50 mA

Operating Conditions & Performance

The series operates within an ambient temperature range of 0°C to +55°C (32°F to 131°F) with a storage temperature capability from -40°C to +85°C. All models provide three-way isolation rated at 700 VDC between power, input, and output circuits.

• Accuracy: ±0.1% of full scale for voltage/current inputs; ±2°C maximum linearization error for thermocouple models (excluding sensor error); ±0.7°C maximum for RTD models
• Response Time: 10 ms (10% to 90%) for voltage and current input models; 1.5 sec for thermocouple and RTD input models
• Power Supply: 22 to 26 Vdc unregulated, with consumption varying by model family from 15 mA to 40 mA

Voltage/Current Input Specifications

• Input Resistance: 1 MΩ for voltage inputs; 50 Ω for current inputs
• Linearity: ±0.02% of full scale
• Ripple and Noise: 0.05% of full scale

Temperature Input Specifications

• Type J Range (DRC-8920): 0 to 500°C (32°F to 932°F)
• Type K Range (DRC-8921): 0 to 1250°C (32°F to 2282°F)
• RTD Range: -50 to 450°C (-58°F to 842°F) for Pt RTD models

Configuration Options

The DRC-8900 Series offers a broad envelope of configurable inputs and outputs housed in a slim plastic case (UL-94V-1) with an integrated DIN rail foot. The series supports screw terminal connections for electrical interfacing.

Input Configurations

• Voltage: 0 to 50 mV, 0 to 100 mV, 0 to 5 V, 0 to 10 V, 0 to 100 V
• Current: 4 to 20 mA, 0 to 20 mA, 0 to 50 mA
• Sensors: Type J and Type K thermocouples; Pt RTD (100Ω, 500Ω, 1000Ω)

Output Configurations

• Voltage Output Models (e.g., DRC-890x): Standardized to 0 to 10 V into a minimum resistive load of 5 KΩ
• Current Output Models (e.g., DRC-891x): Standardized to 4 to 20 mA with a maximum load resistance of 0 to 500 Ohms and an open circuit voltage of 13 Volts

Housing & Environmental Ratings

• Dimensions: 110 H x 22.5 W x 75 mm D (4.33"H x 0.895"W x 2.95"L)
• Weight: 142 g (5 oz)

Key Product Differences

The series is divided into distinct model families based on input type and output signal.

• DRC-890x Models: Accept DC voltage or current inputs; provide a 0 to 10 V output. Includes models DRC-8901 through DRC-8908 covering specific mV, V, and mA ranges.
• DRC-891x Models: Accept DC voltage or current inputs; provide a 4 to 20 mA output. Includes models DRC-8911 through DRC-8918 matching the input ranges of the -890x series.
• DRC-892x Models: Dedicated thermocouple conditioners (Type J and Type K) with a fixed 0 to 10 V output. Includes models DRC-8920 and DRC-8921.
• DRC-894x Models: Dedicated RTD conditioners for Pt sensors (100Ω, 500Ω, 1000Ω) with a fixed 0 to 10 V output. 
Includes models DRC-8940 through DRC-8942.

Accessories available include the iDRN-PS-1000 DIN rail mount power supply (95 to 240 Vac input, 24 Vdc @ 1A output) and RAIL-35 mounting rails in 1 m or 2 m lengths.