Yokogawa KS1-10-B

Yokogawa KS1-10-B

Product Introduction KS1-10-B is a signal isolator manufactured by Yokogawa Electric of Japan for 4 to 20 mA analog signal isolation in process control. The product electrically isolates field transmitter signals from the control system, blocking ground loops and common-mode interference while performing signal distribution and conversion. DIN-rail mounted for analog signal isolation and distribution in petrochemical, chemical, and power process control.

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Description

Yokogawa KS1-10-B

Technical Specifications

  • Product type: Signal isolator
  • Input: 4 to 20 mA
  • Output: 4 to 20 mA
  • Supply: DC24 V
  • Isolation: 1500 VAC three-way
  • Accuracy: ±0.1 % FS
  • Response time: 100 ms
  • Temperature: 0 °C to +55 °C
  • Storage: -20 °C to +70 °C
  • Humidity: 5 % to 90 %, non-condensing
  • Protection: IP20
  • Installation: DIN rail
  • Channels: 1 channel isolation

Functional Features

  • 4 to 20 mA one-in one-out isolation
  • Three-way 1500 VAC isolation blocking ground loops
  • ±0.1 % FS accuracy
  • Loop-powered or external powered options
  • Front panel LEDs for power and signal
  • Compact DIN rail mounting
  • Industrial-grade long-term stability
  • Isolation protects downstream equipment
  • Channel fault diagnostic output
  • Withstands strong industrial EMI

Application Scenarios

  • Petrochemical process control signal isolation
  • Chemical DCS analog signal distribution
  • Power plant transmitter signal isolation
  • Water treatment 4 to 20 mA signal transfer
  • General industrial process signal isolation

Materials and Construction

  • Housing: Flame-retardant engineering plastic
  • PCB: FR4 board
  • Core: Isolation amplifier, DC/DC supply
  • Passive components: Metal film resistors, ceramic capacitors
  • Terminals: Screw-fastened terminals
  • Mounting clip: 35 mm DIN rail clip

Structural Features

  • Narrow DIN rail plastic housing
  • Top input terminals, bottom output terminals
  • Side supply terminals
  • Internal isolation transformer and amplifier
  • Fanless natural convection
  • Compact width saving cabinet space

Working Principle Field 4 to 20 mA enters input terminals; V/I conversion feeds an isolation transformer that transfers the signal to the output side. The transformer provides 1500 VAC three-way isolation; the output side reconstructs a 4 to 20 mA current to the PLC. DC24 V supply feeds a DC/DC converter powering both sides. LEDs indicate power and signal.

Installation Requirements

  • Snap-mount on 35 mm DIN rail
  • Connect input/output terminals per markings
  • Connect DC24 V supply
  • Use shielded twisted pair signal wires
  • Cabinet temperature 0 °C to +55 °C
  • Verify signal direction after power-up

Precautions

  • Never reverse input and output
  • Do not overload
  • Store spares in dry environment
  • Periodically check output accuracy
  • Disconnect power before service
  • Route signal wires separately from power cables

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