INM 5500 Rev 11
54
6 .7 .4
MTL5576-THC - Temperature Converter
Two channel, mV/THC input
The MTL5576-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.
Terminal
Function
1
THC/mV (Ch1)
3
THC/mV (Ch1)
4
THC/mV (Ch2)
6
THC/mV (Ch2)
8
Output –ve (Ch2)
9
ve (Ch2)
11
Output –ve (Ch1)
12
ve (Ch1)
13
Supply –ve
14
ve
Hazardous area
Safe area
Figure 6 .30:
Top label
for MTL5576
