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

27TS

Head-mounted Two-wire Signal Conditioners
27-UNIT

THERMOCOUPLE TRANSMITTER
(PC programmable)

Functions & Features
• Accepts direct input from a thermocouple and provides a standard 4 – 20mA DC signal
• Suitable for Functional Safety applications up to SIL2
• I/O range programming via PC Configurator
• User’s temperature table can be used
• Self diagnostics
• Low temperature drift
• CE marking (conforms to ATEX and EMC)

MODEL: 27TS–[1]

ORDERING INFORMATION
• Code number: 27TS-[1]
Specify a code from below for [1].
(e.g. 27TS-0)
Use Ordering Information Sheet (No. ESU-7655). Factory standard setting will be used if not otherwise specified.
Specify the country in which the product is to be used with the Safety Approval code 2.

[1] SAFETY APPROVAL
0: None
1: FM intrinsically safe
2: CENELEC intrinsic safety (ATEX)

RELATED PRODUCTS
• USB interface Bell202 modem (model: COP-HU)
Usable in ‘non-hazardous’ area only.
• PC configurator software (model: 27MCFG)
Downloadable at M-System’s web site.

GENERAL SPECIFICATIONS
Construction: Sensor head-mounting
Connection: M3 screw terminals (torque 0.5 N·m)
Screw terminal: Nickel-plated brass
Housing material: Flame-resistant resin (black)
Isolation: Input to output
Cold Junction Compensation: CJC sensor incorporated
Self diagnostics: Detects internal error, burnout
User-configurable items: PC and the transmitter are connected with the COP-HU.
· Input sensor type
· Input range
· Burnout
· Output limits (Upper / Lower)
· Damping time (factory set to 0)
· Linearization
· Output calibration
· Loop test output

INPUT SPECIFICATIONS
The input is factory set for use with K thermocouple, 0 to 100°C.
See Table 1 for the available input type, the minimum span and the maximum range.
Input resistance: 1 MΩ min.

OUTPUT SPECIFICATIONS
Output range: 4 – 20 mA DC
Operational range: 3.75 – 23 mA
Load resistance vs. supply voltage:
Load Resistance (Ω) = (Supply Voltage (V) – 9 (V)) ÷ 0.023 (A)   (including leadwire resistance)
Burnout: 3.75 – 3.8 mA or 21.5 – 23 mA
(factory set to 23 mA)
Upper output limit proportional to the input:
20 – 21.5 mA (factory set to 21.5 mA)
Lower output limit proportional to the input:
3.8 – 4 mA (factory set to 3.8 mA)
Update time: 440 msec.

INSTALLATION
Supply voltage
 · 9 – 35 V DC (non-approved)
 · 9 – 28 V DC (approved)
Operating temperature: -40 to +85°C (-40 to +185°F)
(See Safety Parameters for use in a hazardous
location.)

Operating humidity: 0 to 95 %RH (non-condensing)
Mounting: Head-mounting (DIN type B head)
Weight: 50 g (1.76 oz)

PERFORMANCE
Accuracy: As indicated in Table 1, ± 0.075 % of span or ±0.075 % of max. range, whichever is greater.
Add the CJC error. (max. range = 0 % or 100 % value, absolute value of whichever is greater.)
Cold junction compensation error: ±0.5°C (±0.9°F)
Temp. coefficient: 0.0075 % /°C (0.004 % /°F) of max. range
Response time: ≤ 1 sec. (0 – 90 %) with damping time set to 0
Burnout response time: ≤ 2 sec.
Supply voltage effect: ±0.01 % of span/V
Insulation resistance: ≥ 100 MΩ with 500 V DC
Dielectric strength: 1500 V AC @1 minute (input to output)
Safety integrity level according to IEC 61508: Suitable for use in a safety instrumented system up to SIL2 (together with sensor) if appropriate safety instructions are observed. Consult M-System.

STANDARDS & APPROVALS
EU conformity:
ATEX Directive 
  Ex ia EN 60079-11
EMC Directive 
  EMI EN 61000-6-4
  EMS EN 61000-6-2
RoHS Directive
  EN 50581
Safety approval:
FM: Intrinsically safe
  Class I, Division 1, Groups A, B, C and D
  Class I, Zone 0, AEx ia IIC (US)
  Class I, Zone 0, Ex ia IIC (Canada)
  T4, T5 and T6
  (Class 3610, ANSI/ISA 60079-11,
  CAN/CSA-C22.2 No. 157,
  CAN/CSA-C22.2 No. 60079-11)

SAFETY PARAMETERS
Operating temperature
For CENELEC (ATEX) / FM:
  T4: -40 to +80°C
  T5: -40 to +60°C
  T6: -40 to +45°C
Ex-data:
• Output circuit
  Ui (Vmax): 30 V DC
  Ii (Imax): 96 mA DC
  Pi (Pmax): 720 mW
  Ci: 1 nF
  Li: 0 mH
• Sensor circuit
  Uo (Voc): 30 V DC
  Io (Isc): 24 mA DC
  Po: 180 mW
  Co (Ca): 50 nF
  Lo (La): 40 mH

DIMENSIONS unit: mm (inch)

MOUNTING REQUIREMENTS unit: mm (inch)

SCHEMATIC CIRCUITRY & CONNECTION DIAGRAM

M-System Co., Ltd.