Mtl5541A/Mtl5541As - Repeater Power Supply - Eaton Crouse-Hinds MTL5500 Series Instruction Manual

6 .4 .2
Single channel, for 4/20mA, HART® for 2- or 3-wire transmitters
The MTL5541A 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 MTL5541AS acts as a current sink for a safe-area connection rather
than driving a current into the load.
MTL5541A
PWR
MTL5541AS
PWR
Figure 6 .21:
Top labels
for MTL5541A
& MTL5541AS
43

MTL5541A/MTL5541AS - Repeater Power Supply

Hazardous area Safe area
6
5
4
3
+
2
4/20mA
1
–
Terminal Function
1 Input –ve
2 Input +ve
11 Output –ve (+ve current sink)
12 Output +ve (–ve current sink)
13 Supply –ve
14 Supply +ve
7
8
9
MTL5541A MTL5541AS
Load
I
10
+
–
11
I
4/20mA
12 –
+
Vs–
13
Vs+
14
20 to 35V dc
Load
+
–
INM 5500 Rev 11