About Us
Factory Tour
Quality Control
Contact Us
Request A Quote
Home ProductsMTL5500 Series Isolators

MTL5561 (fire and smoke detector interface 2-channel)

MTL5561 (fire and smoke detector interface 2-channel)

MTL5561 (fire and smoke detector interface 2-channel)

Product Details:

Place of Origin: UK
Brand Name: MTL
Certification: CE
Model Number: MTL5561

Payment & Shipping Terms:

Minimum Order Quantity: 1pc
Price: according to the purchase quantity
Packaging Details: carton
Delivery Time: in stock
Payment Terms: T/T payment
Supply Ability: 100pcs
Contact Now
Detailed Product Description

MTL5561 fire and smoke detector interface 2-channel

MTL5561 is a loop-powered 2–channel interface for use with conventional fire and smoke detectors located in hazardous areas. In operation, the triggering of a detector causes a corresponding change in the safe–area current. The unit features reverse input polarity protection, while ‘no-fail’ earth fault detection on either line can be provided by connecting an earth leakage detector to terminal 3 and/or 6.


See also common specification

Number of channels

Two, fully floating, loop powered

Location of fire and smoke detectors

Zone 0, IIC, T4–6 hazardous area if suitably certified

Div. 1, Group A, hazardous area

Input voltage

6 to 30V dc

Current range

1 to 40mA, nominal

Quiescent safe–area current at 20°c

(Hazardous–area terminals open circuit)

< 400µA at VIN = 24V per channel

Integral input polarity protection

Input circuit protected against reverse polarity

‘no-fail’ earth fault protection

Enabled by connecting terminals 3 and/or 6 to an earth leakage

Detector (see notes below)

Fault on either line of each channel proclaimed: unit continues


Minimum output voltage Vout at 20°c

For Vin ≤ 25V:  Vout = Vin – (0.38 x current in mA) – 2V

For Vin > 25V:  Vout = 22.5V – (0.35 x current in mA)

Maximum output voltage

28V from 300Ω

Transfer accuracy at 20°c

Better than 400µA

Temperature drift

<   4µA/°C ( 0°C to 60°C)

< 15µA/°C (–20°C to 0°C)

response time to step input

Settles to within 5% of final value within 1.5ms

Power dissipation within unit

0.7W maximum at 24V with 40mA signal (each channel)

0.9W maximum at 30V with 40mA signal (each channel)


1.  To maintain isolation between the two channels, separate earth leakage

detectors are needed.

2.  The earth leakage detectors introduce a 100µA, 1Hz ripple to the field circuit.










Tag: MTL Safety Barrier

Contact Details

Contact Person: Ms. Steven

Send your inquiry directly to us (0 / 3000)

Other Products
Request A Quote

| Sitemap

Privacy Policy | China MTL5500 Series Isolators Supplier. Copyright © 2016 - 2022 All Rights Reserved. Developed by ECER