Ascon tecnologic K49 User Manual

Ascon Tecnologic - K49 Line - ENGINEERING MANUAL -Vr. 09 - PAG. 2
2.2 Inputs
2.2.1 Termocouple Input
2
1
+
-
External resistance: 100Ω max., maximum error 0.5% of span.
Cold junction: automatic compensation between 0... 50°C.
Cold junction accuracy: 0.1°C/°C after a warm-up of
20 minutes.
Input impedance: > 1 MΩ.
Calibration: According to EN 60584-1.
Note: For TC wiring use proper compensating cable
preferable shielded.
2.2.2 Infrared Sensor Input
Exergen
2
1
+
-
External resistance: Not relevant.
Cold junction: Automatic compensation between 0... 50°C.
Cold junction accuracy: 0.1°C/°C.
Input impedance: > 1 MΩ.
2.2.3 RTD (Pt 100) Input
3
RTD
1
2
Input circuit: Current injection (135 µA).
Line resistance: Automatic compensation up to 20Ω/wire
with maximum error ±0.1% of the input span.
Calibration: According to EN 60751/A2.
Note: The resistance of the 3 wires must be the same.
2.2.4 Thermistors Input
3
PTC/NTC
1
Input circuit: Current injection (25 µA).
Line resistance: Not compensated.
2.2.5 V and mV Input
mV
V
+
__
2
1
+
Input impedance: > 1 MΩ
Accuracy: ±0.5% of Span or ±1 digit @ 25°C.
2.2.6 mA Input
0/4... 20 mA input wiring for passive transmitter
using the auxiliary pws
+
_
+
_
4... 20 mA
2 wires
transmitter
4
1
Input impedance: < 51Ω.
Accuracy: ±0.5% of Span or ±1 digit @ 25°C.
Protection: NOT protected from short circuit.
Internal auxiliary PWS: 10 VDC (±10%), 20 mA max..
0/4... 20 mA input wiring for passive transmitter
using an external pws
+
_
+
_
1
2
0/4...20 mA
Passive
transmitter
_
External
PWS
+
0/4... 20 mA input wiring for active transmitter
+
-
+
-
1
2
0/4...20 mA
Active
transmitter
2.2.7 Logic Inputs
Safety notes:
• Do not run logic input wiring together with power cables;
• Use an external dry contact capable to switch 0.5 mA, 5 VDC;
• The instrument needs 150 ms to recognize a contact
status variation;
• Logic inputs are not isolated by the measuring input.
A double or reinforced isolation between logic inputs and
power line must be assured by the external elements.
Logic input driven by dry contact
6
54
Digital Inputs
12

Ascon tecnologic K49 Specifications

General

Brand	Ascon tecnologic
Model	K49
Category	Controller
Language	English