Fire And Smoke Interface Modules; Mtl4561 - Fire And Smoke Detector Interface - Eaton Crouse-Hinds Series Instruction Manual

50
DRAFT - 22 March 2018
6 .6

Fire and Smoke Interface modules

Interfaces for use with conventional fire and smoke detectors located in hazardous areas.
6 .6 .1

MTL4561 - Fire and Smoke Detector Interface

Two channel
The MTL4561 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.
Hazardous area
MTL4561
Figure 6 .33:
Top labels for
Terminal
MTL4561
Safe area
Ch 2
6
I
+
5
4
–
Fire
detectors
3 I
+
2
1
–
Ch 1
13
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 1)
9 Input +ve (Ch 1)
11 Input –ve (Ch 2)
12 Input +ve (Ch 2)
+
12
Ch 2
11
–
I 10
+
9
Ch 1
8
–
I
7
14
INM 4500/4600 Rev 12