Instruction Manual T601
JAQUET AG
Revision: 004
11/73
Sensor monitoring
3 sensor monitoring settings are available in the configuration software:
•
No Sensor Monitoring
•
Monitoring of supplied sensors (active Sensor Types)
[Also for 2 wire sensors that are supplied via the internal Pull-up resistor (1 k
)
Sensors drawing current outside of I
min
or I
max
are considered to be faulty.
I
min
= 0.5…35 mA
I
max
= 0.5…35 mA
•
Monitoring of non powered sensors (passive Sensor Types)
[For 2 wire sensors such as electromagnetic sensors.]
The sensor is considered to be faulty if the line is broken.
Here the sensor impedance is dynamically measured.
Z < 60 k
= OK
Z > 125 k
= NOT OK
3.2.2 Analog Input
Number
One 0/4 ..20 mA or 1 Temperature input (Pt100)
3.2.2.1 Analog Input as Current Input
Resolution
12 Bit (4096 Steps)
Max Linearity error
1 LSB (Least Significant Bit) ca. 5.37 uA
Measurement error
Max. 0.25 % of Measured value + 1 LSB (-25 °C
+50 °C)
Max. 0.50 % of Measured value + 1 LSB (-40 °C
+70 °C)
Accuracy class
0.2 % of final value
Open circuit voltage
Max. 13.7 V
DC
(active Sensor input)
Driving voltage
Min. 12 V
DC
(active Sensor input)
External load
Max. 600
(active Sensor input)
Internal current limit
I
Max
= 24 mA+/-1 mA (active Sensor input)
Measurement
Impedance
50
(passive Sensor input)
Damping
Hardware time constant T = 4.1 ms
10 %
90 % = 8.6 ms (Hardware)
Actual time = Hardware time co Max. 1 Measurement interval
Temperature Drift
Typ.: 100 ppm/K, max. 150 ppm/K
3.2.2.2 Analogue Input as Temperature Input
Measurement
2 wire or 3 wire
Sensor
Pt100 (Measurement current = 950 uA)
Measuring range
-50 °C
+300 °C
Accuracy
+/-0.5 °C of the measurement value
Max. cable resistance
28
(3 Wire Measurement)
Max. cable length, 3
wire measurement
Cable resistance
AWG
Diameter
Cross
section
Resistance
Max. Length
mm
mm
2
/km
Pt100
T601
38
0.1
0.0082
2190
12.8 m
36
0.13
0.0127
1300
21.5 m
34
0.16
0.02
844
33.2 m
32
0.2
0.032
547
51.2 m
30
0.25
0.051
351
79.8 m
28
0.32
0.08
232
120.7 m
25
0.46
0.16
108
259.3 m
24
0.51
0.21
87.5
320.0 m
2 wire connection
The cable must be kept as short as possible, since the cable resistance will be
measured as well; e.g. a cable having 1
(2 x 0.5
wires) would introduce an
error of about 2.5 °C.
