DRSP-I DIN Rail DC Current Signal Splitter w/Dual Output

Supported Applications

The Omega DRSP-I series consists of DIN rail DC current signal splitters that accept a single 4 to 20 mA input and provide two optically isolated 4 to 20 mA outputs linearly related to the input. Typical applications include isolation, output splitting, output device separation, and redundancy configurations designed to prevent failure of an entire loop if one device fails.

The full 4-way isolation architecture (input, output 1, output 2, power) supports ground loop elimination, common mode signal rejection, and noise pickup reduction in industrial control environments.

Operating Conditions & Performance

The series operates within an ambient temperature range of -10 to 60°C (14 to 140°F). The input accepts a 4 to 20 mA signal with a typical impedance of 50 Ω. Output linearity is better than ±0.1% of span, and stability is rated at better than ±0.04% of span per °C.

Performance specifications include:

• Response Time: 70 milliseconds typical
• Common Mode Rejection: 120 dB minimum
• Isolation Rating: 1200 VRMS minimum across input, output 1, output 2, and power sections
• Output Ripple and Noise: Less than 10 mVRMS
• Housing Protection: IP40 enclosure rating mounting to standard 35 mm (1.37") DIN rail

Configuration Options

The DRSP-I series is configurable across power supply types, loop powering modes, and output adjustment ranges.

Power Supply Options

• DRSP-I: 60 to 265 Vac, 50/60 Hz or 85 to 300 Vdc (6 W maximum)
• DRSP-I-DC: 9 to 30 Vdc or 10 to 32 Vac, 50/60 Hz (6 W maximum)

Loop Powering and Wiring

The module provides selectable loop power for both input and output channels:

• Input Loop Power Supply: 15 Vdc ±10%, regulated, 25 mA; may be selectively wired for sinking or sourcing mA input.
• Output Loop Power Supplies: One per channel (Output 1 and Output 2); 20 Vdc nominal, regulated, 25 mA. Outputs support a load resistance of up to 1000 Ω at 20 mA with 20V compliance.

Adjustments and Diagnostics

• Zero and Span: Multi-turn potentiometers for each output channel allow ±15% of span adjustment range to compensate for load and lead variations.
• Status Indication: Variable brightness LEDs indicate I/O loop level and status (one for input, one for each output).
• Functional Test: Front panel buttons set each output to a test level; adjustable 0 to 100% of span.

Connections and Accessories

The unit features eight 4-terminal removable connectors supporting up to 14 AWG wire size. Available accessories include RAIL-35-1 (1 m DIN rail), RAIL-35-2 (2 m DIN rail), and iDRN-PS-1000 switching power supply.

Key Product Differences

The primary distinction between models in the DRSP-I series is the input power range:
• DRSP-I: Designed for universal AC or DC mains, accepting 60 to 265 Vac (50/60 Hz) or 85 to 300 Vdc.
• DRSP-I-DC: Designed for low-voltage control power systems, accepting 9 to 30 Vdc or 10 to 32 Vac (50/60 Hz).