Eaton MTL4516 - MTL4576-THC - Temperature Converter

INM 4500/4600 Rev 12
55
DRAFT - 22 March 2018 DRAFT - 22 March 2018
6.7.4 MTL4576-THC - Temperature Converter
Two channel, mV/THC input
The MTL4576-THC converts low-level dc signals from temperature sensors mounted in
a hazardous area, into 4/20mA currents for driving safe-area loads. The hazardous area
connections include cold-junction compensation and do not need to be ordered separately.
Performance features, including linearisation for standard thermocouple types, ranging,
monitoring, testing and tagging are selected using
PCS45 software, which is loaded onto a
personal computer and connected via the PCL45USB serial link - see Section 6.9 .
Top label
Use the following LED information to understand the module status.
Status PWR (green) FLT (red) STS(yellow)
Power ON ON
Insufficient voltage or Power OFF OFF
Communication in progress FLASH
Normal working ON OFF OFF
Device failure ON ON
Channel 1 - Sensor failure/Error ON FLASH OFF
Channel 2 - Sensor failure/Error ON FLASH ON
Default configuration for both channels is as shown in 6.7 except S/C alarm set OFF.
Hazardous area Safe area
Configuration
socket
Load
+
4/20mA
Load
4/20mA
Ch2
Ch1
Vs–
Vs+
20 to 35V dc
+
+
–
+
–
Ch2
Ch1
mV
mV
–
–
6
5
4
3
2
1
I
mV
I
9
8
7
12
11
10
13
14
Terminal Function
1 THC/mV (Ch1)
3 THC/mV (Ch1)
4 THC/mV (Ch2)
6 THC/mV (Ch2)
8 Output –ve (Ch1)
9 Output +ve (Ch1)
11 Output –ve (Ch2)
12 Output +ve (Ch2)
13 Supply –ve
14 Supply +ve







Figure 6.37:
Top label for
MTL4576