Mtl5544A/Mtl5544As - Current Repeater - Eaton Crouse-Hinds MTL5500 Series Instruction Manual

6 .4 .4
Two channel, for 4/20mA passive input for HART® transmitters
The MTL5544A provides an input 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 MTL5544AS acts as a current sink for a safe-area connection rather
than driving a current into the load.
MTL5544A
PWR
MTL5544AS
PWR
Figure 6 .23:
Top labels
for MTL5544A
& MTL5544AS
45

MTL5544A/MTL5544AS - Current Repeater

Hazardous area Safe area
6
+
5
Ch 2 4/20mA
4
–
3
+
2
4/20mA
Ch 1
1
–
Terminal Function
1 Ch1 input –ve
2 Ch1 input +ve
4 Ch2 input –ve
5 Ch2 input +ve
8 Ch2 output –ve (+ve current sink)
9 Ch2 output +ve (–ve current sink)
11 Ch1 output –ve (+ve current sink)
12 Ch1 output +ve (–ve current sink)
13 Supply –ve
14 Supply +ve
MTL5544A MTL5544AS
Ch 2
7
I
–
8
4/20mA
9
I
+
Load
Ch 1
10
I
–
11
4/20mA
I 12
+
Load
13 Vs–
14 Vs+
20 to 35V dc
Load
+
+
–
–
Load
+
+
–
–
INM 5500 Rev 11