Dwyer Instruments MTL5541 Operating Manual

Series MTL5541 Galvanic Barrier

A

A

SAFE AREAHAZARDOUS AREA

®

Specications - Installation and Operating Instructions

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Bulletin PC-MTL5541

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The Series MTL5541 Galvanic Barrier provides a fully-oating dc supply for energizing
a conventional 2 or 3-wire 4/20mA transmitter, which is located in a hazardous area,
and repeats the current in another oating circuit to drive a safe-area load. For HART
2-wire transmitters, the unit allows bi-directional communication signals superimposed
on the 4/20mA loop current. Separately powered current sources, such as 4-wirw
transmitters, can be connected but will not support HART communication.

FEATURES/BENEFITS

• Designed to mount on most standard DIN rails

• Approved for use in hazardous areas

APPLICATIONS

• Electrically isolates pressure and level transmitters from unregulated circuits for
intrinsically safe applications.

Mounting and Wiring

MTL5541 MTL5541S

4-20 mA

Com
Tx+
Input

I

I

20 TO 35 VDC

4-20 mA

Vs­Vs+

Load

Load

HAZARDOUS

REA TERMINAL

SPECIFICATIONS
Hazardous Area Input: Signal range: 0 to 24 mA (including over-range);

Transmitter voltage: 16.5 V at 20 mA.
Safe Area Output: Signal range: 4 to 20 mA; Under/over-range: 0 to 24 mA; Load
resistance: 0 to 360Ω @ 24 mA, or 0 to 450Ω @ 20 mA; Current sink: 600Ω max.;
Maximum Voltage Source: 24 VDC; Output resistance: > 1 MΩ.

Power Requirement: 20 to 35 VDC.
Response Time: Settles to within 10% of nal value within 50 µs.
Current Consumption (20 mA signal): 51 mA @ 24V.
Maximum Power Dissipation (20 mA signal): 0.7 W @ 24 VDC, 1.0 W @ 24

VDC.
Isolation: 250 V RMS, tested at 1500 V RMS minimum, between safe- and
hazardous-area terminals; 50 V between safe-area circuits and power supply.

Transfer Accuracy at 68°F (20°C): Better than 15 µA.
LED Indicator: Green: Power Indication.
Temperature Limits: Operating: -6 to 140°F (-20 to 60°C); Storage: -40 to 176°F

(-40 to 80°C).

Temperature Drift: < 0.8µA/°C.
Humidity: 5 to 95% RH.
Mounting: T-section 35mm DIN rail (7.5 or 15mm) to EN 50022.
Terminals: Accommodate up to 2.5 mm2 stranded or single-core.
Safety Description: Vo= 28 V, Io= 93 mA, Po= 651mW, Um= 253 RMS or DC.
Weight: 150 g.
Agency Approvals: FM, UL, ATEX, IECEx, CE.

TERMINAL FUNCTION

1
2
3
10
11
12
13
14

Current Input.
Transmitter Supply +ve.
Common.
Output +ve via 220Ω for HART apps.
Output –ve (+ve current sink).
Output +ve (-ve current sink).
Supply –ve.
Supply +ve.

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SAFE ARE
TERMINAL

MAINTENANCE/REPAIR

Upon nal installation of the Series MTL5541, no routine maintenance is required. The
Series MTL5541 is not eld serviceable and is not possible to repair the unit. Field
repair should not be attempted and may void warranty.

WARRANTY/RETURN

Refer to “Terms and Conditions of Sale” in our catalog and on our website. Contact
customer service to receive a Return Goods Authorization number before shipping the
product back for repair. Be sure to include a brief description of the problem plus any
additional application notes.

Printed in U.S.A. 3/18 FR# 444431-00©Copyright 2018 Dwyer Instruments, Inc.

DWYER INSTRUMENTS, INC.

P.O. BOX 373 • MICHIGAN CITY, INDIANA 46360, U.S.A.

Phone: [phone]

Fax: [phone]

www.dwyer-inst.com

e-mail: [e-mail]