Eaton MTL5514D - Fire and Smoke Interface Modules; MTL5561 - Fire and Smoke Detector Interface

INM 5500 Rev 10
48
6.6 Fire and Smoke Interface modules
Interfaces for use with conventional fire and smoke detectors located in hazardous areas.
6.6.1 MTL5561 - Fire and Smoke Detector Interface
Two channel
The 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.
Hazardous area Safe are a
–
–
+
+
–
+
–
+
Ch 2
Ch 1
Ch 2
Ch 1
6
5
4
3
2
1
7
8
9
10
11
12
13
14
I
I
I
I
Fire
detectors
Terminal Function
1 Output –ve (Ch 1)
2 Output +ve (Ch 1)
4 Output –ve (Ch 2)
5 Output +ve (Ch 2)
8 Input –ve (Ch 2)
9 Input +ve (Ch 2)
11 Input –ve (Ch 1)
12 Input +ve (Ch 1)
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Figure 6.27:
Top label
for MTL5561