35
© 2017 Eaton
All Rights Reserved
Publication No.
Eaton Electric Limited,
Great Marlings, Butterfield, Luton
Beds, LU2 8DL, UK.
Tel: + 44 (0)1582 723633 Fax: + 44 (0)1582 422283
E-mail: mtlenquiry@eaton.com
www.mtl-inst.com
EUROPE (EMEA):
+44 (0)1582 723633 mtlenquiry@eaton.com
THE AMERICAS:
+1 800 835 7075 mtl-us-info@eaton.com
ASIA-PACIFIC:
+65 6 645 9888 sales.mtlsing@eaton.com
The given data is only intended as a product description and should not be regarded as a legal
warranty of properties or guarantee.
In the interest of further technical developments, we reserve the right to make design changes.
Hazardous area Safe area
–
–
+
+
–
+
–
Ch 2
Ch 1
Ch 2
Ch 1
+
6
5
4
3
2
1
I
I
I
I
Fire
detectors
9
8
7
12
11
10
13
14
MTL4561 – MTL5561
FIRE AND SMOKE
DETECTOR INTERFACE
2-channel
The MTLx561 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.
SPECIFICATION
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
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)
Safety description for each channel
U
o
=28V I
o
=93mA P
o
=0.65W U
m
= 253V rms or dc
MTL5561
MTL4561
Hazardous area Safe area
FSM
FUNCTIONAL SAFETY
MANAGEMENT
IEC 61508:2010
SIL capable
These models have been assessed for use in
IEC 61508 functional safety applications.
SIL2 capable for a single device (HFT=0)
SIL3 capable for multiple devices in safety redundant
configurations (HFT=1)
See data on MTL web site and refer to the safety
manual.
EPSx561 Rev7 010916
SIL
2
IEC 61508:2010
SIL
3
IEC 61508:2010