INM 5500 Rev 11
51
6 .7 .1
MTL5573 - Temperature Converter
Single channel, THC or RTD input
The MTL5573 converts a low-level dc signal from a temperature sensor mounted
in a hazardous area into a 4/20mA current for driving a safe-area load. Software
selectable features include linearisation, ranging, monitoring, testing and tagging for all
thermocouple types and 2-, 3- or 4-wire RTDs. (For thermocouple applications the HAZ-
CJC plug on terminals 1–3 includes an integral CJC sensor). Configuration is carried out
using a personal computer.
Top label
Use the following LED information to understand the module status.
Status
PWR
(green)
STS
(yellow)
Power ON
ON
Insufficient voltage or Power OFF
OFF
Normal working
ON
Device failure
FLASH
Sensor failure/Error
FLASH
Early burnout detection (EBD)
FAST FLASH
Hazardous area
Safe area
Vs–
Vs+
20 to 35V dc
–
+
mV
4-wire
3-wire
Configuration
socket
Load
+
4/20mA
–
6
5
4
3
2
1
7
8
9
10
11
12
13
14
I
mV
Terminal
Function
1
THC/EMF/RTD input –ve
3
THC/EMF/RTD input +ve
4
3-wire RTD input –ve
5
4-wire RTD input +ve
11
Output –ve
12
ve
13
Supply –ve
14
ve
3
Figure 6 .32:
Top labels for
MTL5573
