Series MTL5541 Galvanic Barrier

Intrinsically Safe Isolators for Hazardous Locations

The Series MTL5541 Galvanic Barrier provides intrinsically safe isolation for communication with Dwyer® transmitters approved for use in hazardous areas. This galvanic barrier eliminates the need for a high integrity earth ground required when using shunt type diode type safety barriers. DIN rail mounting and plug-in signal and power connectors simplify installation and maintenance.

Product Applications

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

Models & Ordering

Shipping Information

All shipping times are dependent on product availability at time of shipment.

Although we make every effort to ensure a continuous supply of our products, occasional circumstances may force us to temporarily run out of a product, or have shipping delays. Should this occur, customers will be notified soon after placement of any orders for such products and, if applicable, items will be put on backorder. For orders requiring expedited shipment, our customer service team can be contacted to confirm product availability

Model Description Usually Ships* Price Code Order
Ships: Same Day
Price: $978.00
Galvanic barrier. Same Day* $978.00 B Order


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 final 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.
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.
5 to 95% RH.
T-section 35mm DIN rail (7.5 or 15mm) to EN 50022.
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.
5.3 oz (150 g).
Agency Approvals:
See table on catalog page.


  • Easy snap-in installation for most DIN rails
  • Safe to use in hazardous locations


Model Number Description Usually Ships* Price Code Order
Aluminum DIN rail A-360 Aluminum DIN rail Same Day $11.00 B Order

Product Literature


Catalog Pages

Product Data Sheet


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