Technical Specifications:

• Number of Channels: 4 channels
• Input Signal: 4–20 mA DC (2-wire)
• Output Signal: 4–20 mA DC (2-wire, isolated per channel)
• Isolation: Channel-to-channel galvanic isolation (500 V DC)
• Input-to-Output Isolation: 500 V DC
• Accuracy: ±0.1% of Span (FS)
• Load Resistance: Maximum 600 Ω per output (at 24 V DC supply)
• Power Supply: 24 V DC (bus-powered or loop-powered)
• Power Consumption: Maximum 1.5 W per module
• Operating Temperature: 0°C to +50°C (+32°F to +122°F)
• Protection Rating: IP20 (cabinet mounting only)
• Dimensions (W × H × D): 25 mm × 160 mm × 115 mm (card format, DIN rail mount)
• Weight: Approximately 0.3 kg

Functional Features:

• 4 independent isolated outputs from a single input signal
• Channel-to-channel isolation — each output is electrically independent
• Signal distribution — one input can drive up to 4 separate destinations
• Ground loop elimination — isolation breaks unwanted current paths
• Signal buffering — maintains signal integrity over long cable runs
• LED indicators per channel for input/output status
• DIN rail mounting for easy cabinet installation

Structural Characteristics:

• Card-type module for DIN rail mounting (TS 35/7.5 or TS 35/15)
• Plastic housing with terminal blocks on front panel
• LED status indicators per channel (green = normal, red = fault)
• Screw-terminal connections for all inputs and outputs

Working Principle:
The SD10 accepts a 4–20 mA DC input signal on its input terminal. An internal isolation amplifier converts the current signal to a voltage, passes it through a high-voltage isolation barrier (500 V DC) using opto-couplers or transformers, and reconverts it to a 4–20 mA DC output on each of the 4 isolated output channels. Each output channel is completely independent, allowing the same signal to be sent to 4 different devices (e.g., DCS, recorder, indicator, PLC) without ground loop interference.

Advantages:

• Eliminates ground loops — the primary reason for using signal isolators
• 4 outputs from 1 input — reduces wiring and transmitter count
• ±0.1% accuracy — signal quality is maintained across all outputs
• Compact DIN rail design — saves cabinet space
• No external power required — loop-powered operation

Applicable Industries:

• Oil and Gas
• Chemical Processing
• Power Generation
• Water and Wastewater
• Building Automation (HVAC)

Installation Requirements:

• Mount on DIN rail inside a control cabinet
• Connect the input signal wires to the input terminal block
• Connect each output to its destination device using shielded twisted-pair cable
• Ensure each output loop has its own power supply or is loop-powered
• Ground the module chassis to the cabinet ground bar

Precautions:

• Do not connect voltage signals (0–10V) to the current input — this will damage the module
• Maximum input current: 25 mA DC (do not exceed)
• Ensure the total load on all 4 outputs does not exceed the input transmitter’s drive capability (typically 600 Ω per output)
• Do not mix hazardous area and non-hazardous area wiring on the same module unless properly rated