·Some details are not shown. Please refer to specification sheets for all information.

26REX

Head-mounted Two-wire Signal Conditioners
26-UNIT

RTD TRANSMITTER
(intrinsically safe)

Functions & Features
• Accepts direct input from an RTD and provides
a standard 4 – 20mA DC signal
• Linearization and burnout
• Intrinsic Safety
Typical Applications
• Mounting in a sensor connection head minimizes noise effect and signal degradation
 

MODEL: 26REX–4[1]

ORDERING INFORMATION
• Code number: 26REX-4[1]
Specify a code from below for [1].
 (e.g. 26REX-41)
• Temperature range (e.g. 0 – 100°C)
English manual is included in the product package. Use Ordering Information Sheet (No. ESU-4267) to specify the country in which the product is to be used.

INPUT RTD (2- or 3-wire)
4: Pt 100 (JIS'97, IEC)
Note: Consult M-System for 2-wire RTD

[1] TEMPERATURE UNIT
1: °C
2: °F

GENERAL SPECIFICATIONS
Construction: Sensor head-mounting
Connection: Euro terminal
Applicable wire size: 0.14 – 1.5 mm2, stripped length: 6mm
Housing material: Flame-resistant resin (black)
Zero adjustment: -1 to +5 % (front)
Span adjustment: 95 to 105 % (front)
Burnout: Upscale
Linearization: Standard

INPUT SPECIFICATIONS
Maximum leadwire resistance: 20 Ω per wire (3-wire)
Sensing current: 1 mA
Temperature range
°C:
0 – 50, 0 – 100, 0 – 150, 0 – 200, 0 – 300,
0 – 400, 0 – 500, 0 – 650
°F: 0 – 100, 0 – 200, 0 – 300, 0 – 400, 0 – 600,
0 – 800, 0 – 1000, 0 – 1200

OUTPUT SPECIFICATIONS
Output: 4 – 20 mA DC
Load resistance vs. supply voltage:
Load Resistance (Ω) = (Supply Voltage (V) – 10 (V)) ÷ (0.02 (A))
(including leadwire resistance)

INSTALLATION
Supply voltage: 12 – 30 V DC
Operating temperature: -40 to +80°C (-40 to +176°F)
Operating humidity: 0 to 90 %RH (non-condensing)
Mounting: Head-mounting (DIN type B head)
Weight: 30 g (1.1 oz)

PERFORMANCE in percentage of span
Accuracy: ±0.1 % or ±0.1°C (±0.2°F), whichever is greater.
Temp. coefficient: ±0.02 %/°C (±0.01 %/°F)
Response time: ≤ 0.5 sec. (0 – 90 %)

STANDARDS & APPROVALS
EU conformity:
ATEX Directive 
  EEx ia EN 50020
EMC Directive 
  EMI EN 61000-6-4
  EMS EN 61000-6-2
RoHS Directive
  EN 50581
Safety approval:

SAFETY PARAMETERS
Operating temperature
T4: -40 to +80°C
Ex-data:
• Output circuit
  Ui: 30 V DC
  Ii: 100 mA DC
  Pi: 750 mW
  Ci: 0 μF
  Li: 0 mH
• Sensor circuit
  Uo: 8 V DC
  Io: 8 mA DC
  Po: 16 mW
  Co: 100 nF
  Lo: 6 mH

DIMENSIONS unit: mm (inch)

MOUNTING REQUIREMENTS unit: mm (inch)

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

M-System Co., Ltd.