Fire And Smoke Interface Modules; Mtl5561 - Fire And Smoke Detector Interface - Eaton Crouse-Hinds MTL5500 Series Instruction Manual

6 .6
Interfaces for use with conventional fire and smoke detectors located in hazardous areas.
6 .6 .1
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.
MTL5561
Figure 6 .27:
Top label
for MTL5561
49

Fire and Smoke Interface modules

MTL5561 - Fire and Smoke Detector Interface

Hazardous area
Ch 2
+
–
Fire
detectors
+
–
Ch 1
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)
Safe area
6 7
I
5 8
4 I 9
10
3 I
11
2
12
I
1
13
14
–
Ch 2
+
–
Ch 1
+
INM 5500 Rev 11