MTL Instruments MTL 9492-PS-PLUS Data sheet

Technical data

MTL intrinsic safety solutions

November 2015
EPS 9492-PS-PLUS rev1

MTL 9492-PS-PLUS

12V DC intrinsically safe power supply

• Isolated power supply

• Zone 2 mountable

• DIN-rail or backplane mounting

• ATEX / IECEx certified

• 480mA @ 10.00V DC - Ex ia IIB

• 550mA @ 11.90V DC - Ex ib IIB output

• Power over Ethernet option

• Multiple outputs achieved by ganging

9492-PS-PLUS modules using 24V DC power
distribution backplane

• Wide operating temperature −40°C to +70°C

The MTL 9492-PS-PLUS power supply is the preferred method for
supplying the 9460-ET series of intrinsically safe ethernet modules

and is based on an isolating power supply. It takes a 24V DC safe area
/ Zone 2 supply and produces an intrinsically safe, 12V DC nominal
output capable of powering the ethernet modules mounted in a Zone 1
hazardous area. The 9492-PS-PLUS may be mounted in a safe area or
Zone 2 hazardous area.

Each 9492-PS-PLUS can power a single ethernet module. In order
to provide multiple outputs required for several ethernet modules,
the 9492-PS-PLUS power supply module is ganged up to the
required number of ways, either DIN-rail mounted or using the power
distribution backplane to simplify the 24VDC input connection to the
modules.

The 9492-PS-PLUS module has LED power indication for both
input and output along with internal current limiting and electronic
auto-reset circuit breaker action to protect the module in the event of
its output being short circuited or overloaded. This also minimises the
power dissipation during the fault to a negligible level, thus improving
reliability.

The output can be from either the Ex ia IIB or Ex ib IIB output
connectors depending upon application. The ‘ib’ IIB output provides

a higher useable output power where the Gas Group and Zone
allows.

Measurement Technology 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

© 2015 MTL
All Rights Reserved
Publication No. EPS 9492-PS-PLUS rev1 131115
November 2015

1

12V DC intrinsically safe power supply

Minimum output voltage Equivalent circuit

November 2015

SPECIFICATION

See also System Specification

POWER INPUT

Separately powered

Input voltage

24V DC (20 – 30V)

Input current

390mA

Input protection

Fuse + supply reversal diode

Connectors (see dimension drawing)

DIN rail mounting: screw terminals – capacity 2.5mm

stranded or single core

Backplane mounting: multipin connector

POWER OUTPUT

[Ex ia] output (pins 1 & 3)

Graph shows normal working range & total available range

10.0

Certification Code

See approvals

Safety description

See certificate

DIMENSIONS (mm)

2

480

[Ex ib] output (pins 5 & 6)

12.5

11.9

550

Connectors

9492-PS-PLUS is supplied with two IS output connectors.
Capacity 2.5mm

2

stranded or single core

(When using crimp ferrules for the IS connectors the metal tube
length should be 12mm and the wire trim length 14mm.)

ISOLATION

Isolation - input to output

Um = 253V rms

SAFETY

Location of module

Safe area, Zone 2

Location of field wiring

[Ex ia] output

Zone 0, IIB hazardous area
[Ex ib] output

Zone 1, IIB hazardous area

Measurement Technology 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

© 2015 MTL
All Rights Reserved
Publication No. EPS 9492-PS-PLUS rev1 131115
November 2015

1.09

12.5V

MECHANICAL

Mounting

DIN rail

Please contact Eaton MTL product line for ‘backplane’ option
Dimensions

See diagram

Weight

130 g

ENVIRONMENTAL

Ambient temp

Operating −40°C to +70°C
Storage −40°C to +70°C

Relative Humidity

5 to 95% RH (non-condensing)

Ingress Protection

Select enclosure to suit application, see certificate for information

LED INDICATORS

OFF Flash ON

Pwr (gre en)

IS (green)

24V power fail N/A 24V power OK

IS power fail output overload

IS power OK
or short circuit
present

EUROPE (EMEA):

[phone]
[e-mail]

THE AMERICAS:

[phone]
[e-mail]

ASIA-PACIFIC:

[phone]
[e-mail]

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

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