Eaton MTL4516 - MTL4544 A;MTL4544 AS - Current Repeater

INM 4500/4600 Rev 12
45
DRAFT - 22 March 2018 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.
Terminal Function
1 Ch1 input –ve
2 Ch1 input +ve
4 Ch2 input –ve
5 Ch2 input +ve
8 Ch1 output –ve (+ve current sink)
9 Ch1 output +ve (–ve current sink)
11 Ch2 output –ve (+ve current sink)
12 Ch2 output +ve (–ve current sink)
13 Supply –ve
14 Supply +ve
Hazardous area Safe area
+

4/20mA
Load
Ch 2
Ch 1
MTL4544A MTL4544A
S
Load
+

Vs
Vs+
20 to 35V dc
Ch 2
Ch 1
+

4/20mA
Load Load
+


+
4/20mA
4/20mA
I
I
I
I
6
5
4
3
2
1
9
8
7
12
11
10
13
14




Figure 6.28:
Top labels for
MTL4544A &
MTL4544AS