18KDU MSYSTEM | Alldatasheet

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Technical content

MODEL: 18KDU 18KDU SPECIFICATIONS ES-0428 Rev.1 Page 1/3 http://www.m-system.co.jp/ Rack-mounted DCS Signal Conditioners 18K-RACK CURRENT LOOP SUPPLY (10 – 50 mA / 4 –20 mA loop) Functions & Features

  • 2-wire transmitter circuit with short-circuit protection
  • Reposition the shorting pin to switch input signals between 10 - 50 mA DC and 4 - 20mA DC
  • Applicable to smart transmitters
  • Can also be used as a 10 - 50 mA DC / 4 - 20 mA DC isolator
  • Module can be retracted without removing wiring for an insulation test
  • Optional power switch MODEL: 18KDU–66–R[1]

ORDERING INFORMATION

  • Code number: 18KDU-66-R[1] Specify a code from below for [1]. (e.g. 18KDU-66-R/S) INPUT Current 10 – 50 mA DC or 4 – 20 mA DC OUTPUT 1 Voltage 6: 1 – 5 V DC (Load resistance 2000 Ω min.) OUTPUT 2 Voltage 6: 1 – 5 V DC (Load resistance 2000 Ω min.) POWER INPUT DC Power R: 24 V DC (Operational voltage range 24 V ±10 %, ripple 10 %p-p max.) [1] OPTIONS Power Switch blank: None /S: With power switch GENERAL SPECIFICATIONS Construction: Rack-mounted; terminal access via screw terminals on the front and connector on the rear; terminal cover provided Connection Input: M3.5 screw terminals (torque 0.8 N·m) and connector Output 1: Connector Output 2: M3.5 screw terminals (torque 0.8 N·m) and connector Power input: Supplied from connector Screw terminal: Nickel-plated steel Isolation: Input to output 1 to output 2 to power Overrange output: Approx. -10 to +120 % at 1 – 5 V Zero adjustment: -5 to +5 % (front) Span adjustment: 95 to 105 % (front) Input range selector: Jumper pin on the PCB The input is factory set to 10 – 50 mA DC. Specify when 4 – 20 mA is required. SUPPLY OUTPUT Output voltage: 24 – 28 V DC with no load Current rating: ≤ 60mA DC
  • Shortcircuit Protection Current limited: Approx. 65 mA Protected time duration: No limit INPUT SPECIFICATIONS ■ DC Current: Input resistor incoporated 110 Ω ±1 % with 10 – 50 mA 260 Ω ±1 % with 4 – 20 mA OUTPUT SPECIFICATIONS The output goes below 0 % when the input is open. INSTALLATION Current consumption: Approx. 105 mA Operating temperature: -5 to +55°C (23 to 131°F) Operating humidity: 30 to 90 %RH (non-condensing) Mounting: Standard Rack 18KBXx Weight: 150 g (0.33 lb)

MODEL: 18KDU 18KDU SPECIFICATIONS ES-0428 Rev.1 Page 2/3 http://www.m-system.co.jp/ PERFORMANCE in percentage of span Accuracy: ±0.1 % Temp. coefficient: ±0.015 %/°C (±0.008 %/°F) Response time: ≤ 0.5 sec. (0 – 90 %) Line voltage effect Supply output: ±3 % over voltage range Output signal: ±0.1 % over voltage range Insulation resistance: ≥ 100 MΩ with 500 V DC Dielectric strength: 500 V AC @ 1 minute (input to output 1 to output 2 to power to ground) EXTERNAL VIEW Power Switch Span Adj. Zero Adj. 7 8 5 6 3 4 ON OFF ■ WITH POWER SWITCH EXTERNAL DIMENSIONS unit: mm (inch) 110 (4.33 ) 93 (3.66) 24 (.94) 7 (.28) 78 (3.07)32 (1.26) 8–M3.5 SCREW 7 (.28) 2–M3 SCREW

MODEL: 18KDU 18KDU SPECIFICATIONS ES-0428 Rev.1 Page 3/3 http://www.m-system.co.jp/ TERMINAL ASSIGNMENTS 1 2 3 4 7 8 5 6 SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM SZ SZ250Ω 100Ω Short-Circuit Protection /square7 When Used as Isolator Output Driver Output Driver OUTPUT 2 OUTPUT 1 POWER OUTPUT 2 CONNECTOR Voltage / Duty Cycle Section A. Field Terminals /square7 When Used as Current Loop Supply V − 1 - 5V DC MONITOR No Connection 4 - 20 mA DC or 10 - 50 mA DC * With power switch only Use either of module or external field terminals. Module Field Terminals (Section A) External Field Terminals (Section A) Isolation 2-WIRE TRANSMITTER Specifications are subject to change without notice.