Emerson E300 Series - Page 282

Safety
information
Product
information
Mechanical
installation
Electrical
installation
Getting
started
User Menu A Commissioning
Advanced
Parameters
Diagnostics Optimization CT MODBUS RTU Technical Data
282 E300 Design Guide
Issue Number: 1
T8 Analog Input 3 Thermistor Type (F59) defines the operation of the temperature feedback interface for analog input 3 when T8 Analog Input 3 Mode
(F52) is set up for a temperature feedback mode. When a temperature feedback mode is selected a 2 mA current source is connected to analog input
3 to supply the temperature feedback device that is connected to the input.
DIN44082 and KTY84 devices should always be connected directly to analog input 3. The other devices can be connected directly to analog input 3
if the 2 wire connection option is selected. Alternatively these devices can be used with a 4 wire connection to remove the effect of voltage drops due
to the 2 mA supply current as shown below. If a 4 wire connection is selected analog input 1 is disabled and T5 T6 Analog Input 1 (F35) always reads
as 0.0 %.
Figure 8-22 Connection for PT 100, PT1000 and PT2000 thermistors
Over-temperature detection becomes active for input 3 if T8 Analog Input 3 Thermistor Feedback (F62) > T8 Analog Input 3 Thermistor Trip
Threshold (F60). Over-temperature becomes inactive for input 3 if T8 Analog Input 3 Thermistor Feedback (F62) < T8 Analog Input 3 Thermistor
Reset Threshold (F61). If T8 Analog Input 3 Mode (F52) is 7 or 8 (i.e. tripping is enabled) an Thermistor.003 trip is initiated. The default values for T8
Analog Input 3 Thermistor Trip Threshold (F60) and T8 Analog Input 3 Thermistor Reset Threshold (F61) are the levels specified in the DIN 44082
standard.
See T8 Analog Input 3 Thermistor Trip Threshold (F60).
T8 Analog Input 3 Thermistor Type (F59) Compatible devices
0: DIN44082 Three thermistors in series as specified in DIN44082 standard
1: KTY84 KTY84 PTC thermistor
2: PT100 (4 W) PT100 PTC thermistor with 4 wire connection
3: PT1000 (4 W) PT1000 PTC thermistor with 4 wire connection
4:PT2000 (4 W) PT2000 PTC thermistor with 4 wire connection
5: 2.0 mA (4 W) Any device. Full scale equivalent to a resistance of 2.5k Ohms with 4 wire connection
6: PT100 (2 W) PT100 PTC thermistor with 2 wire connection
7: PT1000 (2 W) PT1000 PTC thermistor with 2 wire connection
8: PT2000 (2 W) PT2000 PTC thermistor with 2 wire connection
9: 2.0 mA (2 W) Any device. Full scale equivalent to a resistance of 2.5k Ohms with 2 wire connection
F60 T8 Analog Input 3 Thermistor Trip Threshold
Mode Open-Loop, RFC-A, RFC-S
Minimum 0 Maximum 5000
Default 3300 Units Ω
Type 16 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 0
Coding RW
F61 T8 Analog Input 3 Thermistor Reset Threshold
Mode Open-Loop, RFC-A, RFC-S
Minimum 0 Maximum 5000
Default 1800 Units Ω
Type 16 Bit User Save Update Rate Background read
Display Format Standard Decimal Places 0
Coding RW