MODEL: 27R

27R SPECIFICATIONS

ES-7654 Rev.9 Page 1/4

http://www.m-system.co.jp/

Head-mounted Two-wire Signal Conditioners

27-UNIT

RTD TRANSMITTER

(PC programmable; non-isolated)

Functions & Features

• Accepts direct input from an RTD and provides

a standard 4 – 20 mA 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

44 (1.73) DIA.

20.7

(.81)

mm (inch)

MODEL: 27R–[1][2]

ORDERING INFORMATION

• Code number: 27R-[1][2]

Specify a code from below for each of [1] and [2].

(e.g. 27R-0/M)

Use Ordering Information Sheet (No. ESU-7653). 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

(Option code /M is not selectable)

2: ATEX intrinsic safety

(Option code /M is not selectable)

[2] OPTIONS

Function Monitor LED

Blank: Without

/M: With

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)

Function monitor LED: Input status and error status are

displayed by blinking mode.

User-configurable items: PC and the transmitter are

connected with the COP-HU.

• Input sensor type

• Number of wires

• 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 Pt 100 (JIS ’97, IEC),

0 to 100°C.

■ RTD (2-wire, 3-wire or 4-wire)

Input resistance: ≥ 1 MΩ

Excitation: 0.2 mA

Allowable leadwire resistance: Max. 10 Ω per wire

Temperature Range

RTD

MIN. SPAN

USABLE RANGE

Pt 100 (JIS '97, IEC)

Pt 500

Pt 1000

JPt 100 (JIS '89)

°C

°F

10

18

°C

°F

10

18

°C

°F

10

18

°C

°F

10

18

-200 to +850

-328 to +1562

-200 to +850

-328 to +1562

-200 to +850

-328 to +1562

-200 to +510

-328 to +950

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: