Mtl4544A/Mtl4544As - Current Repeater - Eaton Crouse-Hinds Series Instruction Manual

INM 4500/4600 Rev 12
DRAFT - 22 March 2018
6 .4 .5

MTL4544A/MTL4544AS - Current Repeater

Two channel, 4/20mA, passive input for HART® transmitters
The MTL4544A provides inputs for separately powered 4/20mA transmitters and also
allows bi-directional transmission of HART communication signals superimposed on the
4/20mA loop current. Alternatively, the MTL4544AS acts as a current sink for a safe-area
connection rather than driving a current into the load.
Hazardous area
MTL4544A
PWR
Terminal
MTL4544AS
1
PWR
2
4
Figure 6 .28:
5
Top labels for
MTL4544A & 8
MTL4544AS 9
11
12
13
14
Safe area
Ch 2
6
I
+
5
4/20mA
I
4
–
I
3
2
4/20mA
I
1
Ch 1
13 14
Function
Ch1 input –ve
Ch1 input +ve
Ch2 input –ve
Ch2 input +ve
Ch1 output –ve (+ve current sink)
Ch1 output +ve (–ve current sink)
Ch2 output –ve (+ve current sink)
Ch2 output +ve (–ve current sink)
Supply –ve
Supply +ve
MTL4544A MTL4544AS
+ Ch 2
Load Load
–
12
4/20mA
11
–
+
10
+ Ch 1 Load Load
–
9
4/20mA
8
–
+
7
20 to 35V dc
Vs+
Vs–
45