MTL5541AS datasheet(16/29 Pages) EATON

16 / 29 page

EUROPE (EMEA)

Tel: +44 (0)1582 723633

Fax: +44 (0)1582 422283

AMERICAS

Tel: +1 281 571 8065

Fax: +1 281 571 8069

ASIA PACIFIC

Tel: +65 6 487 7887

Fax: +65 6 487 7997

E-mail: enquiry@mtl-inst.com

Web site: www.mtl-inst.com

The given data is only intended as a product description and should not be re-

garded as a legal warranty of properties or guarantee. In the interest of further

technical developments, we reserve the right to make design changes.

MTL5526 SWITCH-

OPERATED RELAY

two–channel IS–output

The MTL5526 enables two separate IS circuits in a hazardous area

to be relay-contact controlled by two on-off switches or logic signals

in a safe area. Applications include the calibration of strain–gauge

bridges; changing the polarity (and thereby the tone) of an IS

sounder; the testing of IS fire alarms; and the transfer of safe-area

signals into an annunciator with IS input terminals not segregated

from each other. The output–relay contacts are certified as non–

energy–storing apparatus, and can be connected to any IS circuit

without further certification, provided that separate IS circuits are

such that they would remain safe if connected together.

SPECIFICATION

See also common specification

Number of channels

Two, fully floating

Location of control circuit

Safe area

Input/output characteristics

Contact/Logic mode

(Inputs suitable for switch contacts, an open–collector transistor

or logic drive)

Relay energised if

< 450

Ω or < 1V applied

Relay de–energised if

> 5k

Ω or > 2V applied (35V max.)

Loop powered mode

Relay energised if

>20V

Relay de-energised if

<17V

Power supply failure protection

Relays de–energised if supply fails

Response time

25ms nominal

Contacts (suitable for connection to IS circuits)

1–pole changeover per channel

Contact rating

250V dc, limited to 30V dc for IS applications, 2A

(reactive loads must be suppressed)

Contact life expectancy

2 x 107 operations at maximum IS load

Relay drive (see switch setting table)

Switch selection of loop powered or contact/logic control for

both channels. Further switch selects "1in2out" mode

LED indicators

Yellow: one provided for each channel, ON when relay is

energised

Green: one provided for power indication

Power requirement, Vs

44mA at 24V dc

41mA at 20V dc

60mA at 35V dc

Power dissipation within unit

1.1W maximum at 24V

Safety description (each channel)

Non-energy–storing apparatus: relay contacts may be

connected to any IS circuit without further consideration

EPS5526-1

Terminal

Function

IS relay output 1 (normally open)

IS relay output 1 (normally closed)

IS relay output 1 (common)

IS relay output 2 (common)

IS relay output 2 (normally closed)

IS relay output 2 (normally open)

Relay 1 control +ve

Relay 1 control –ve

Relay 2 control +ve

Relay 2 control –ve

Supply –ve

Supply +ve

Mode

Function

SW1

SW2

SW3

SW4

Contact/Logic

Input

2 ch

Off

1in2out

Loop Powered

2 ch

Off

Hazardous area

Safe area

IS relay

Vs+

20 to 35V dc

Control

20 to

35V dc

Loop

powered

Contact

inputs

All contacts shown

in normal position

(relays de-energised)

* this link applies only to

contact/logic operation

User switch settings for operating mode

Jan 2009

MTL5541AS Datasheet(PDF) 16 Page - Eaton All Rights Reserved.

MTL5541AS Datasheet(HTML) 16 Page - Eaton All Rights Reserved.

Html Pages

1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29

Datasheet Download

Link URL