MTL Instruments MTL1142 Data sheet

DRAFT - 03 August 2017

Technical data

MTL signal conditioners

MTL1142 Transmitter
Power Supply

1 Channel, Smart for
2/4-wire transmitters

The MTL1142 is a Single Channel Analogue
Input isolator with current source or current
sink output (switch selectable). HART
communication is provided for Smart two
wire transmitters. The transmitter can be
interrogated either from the operator station or
by a hand-held communicator (HHC).
Power for this module is supplied via the power
bus embedded in the DIN rail.
The PBUS6.2 kit must be ordered separately. 10
x 2 way power clips are provided to power 20
modules.
The MTL1991 is used to feed power onto
the bus.

August 2017
EPS 1142 rev 3

PWR

+

-

Terminals Function

1 Tx+

2 Input

3 Common

5 Output + ( with HART )

6 Output - ( with HART )

D Power supply -ve

E Power supply +ve

Tx+

1

+

­Input

2

Com

3

D E

Vs- Vs+

5

6

+

4-20mA

-

Source - Sink

Load

Load

Output

-

+

SPECIFICATION see also common specification

Number of channels

Location of Transmitter

Input and output signal range

Under/Over-range

System output load resistance (source mode)

Power supply voltage

Output voltage (field power supply)

Transfer Accuracy at 20 °C

Temperature drift

Maximum current consumption (with 20mA signal)

Maximum power dissipation within unit

Digital Signal Bandwidth

Isolation

One, with 1 fully floating output

Safe area

4 to 20mA Output current source or sink, switch selectable

<3.0mA to >23mA

@ 20mA: 0 to 440Ω @ 24mA: 0 to 360Ω

18V to 32V DC

≥16.5V at 20mA

Transmitter powering mode: < ±20μA

<2μA/°C (-20 to +60°C)

52mA @ 24V dc

<0.7W @ 24V dc

Approx. 3dB @ 1KHz to 2.2KHz

250V ac or dc functional isolation between power, field and system
circuits. (Tested to 1100Vac)

Eaton Electric Limited,
Great Marlings, Butterfield, Luton
Beds, LU2 8DL, UK.
Tel: + 44 (0)1582 723633 Fax: + 44 (0)1582 422283
E-mail: [e-mail]
www.mtl-inst.com

© 2017 Eaton
All Rights Reserved
Publication No. EPS 1142 rev 3 030817
August 2017

1

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The given d ata is only intended as a p roduct
descrip tion and sho uld not be reg arded as a legal
warrant y of properties or gu arantee. In t he interest
of further technical developments, we reserve the
right to make de sign changes.