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3.1
ELECTRICAL INSTALLATION
The figures below reproduce the labels placed on the top of the device and show the disposition of the
N20K48 Modular Controller
resources:
POWER SUPPLY 100~240 VAC/DC
POWER SUPPLY 24 VDC/AC
INSTALLATION RECOMENDATIONS
Electrical connections labels
•
Electronic and analog signal conductors should run through the plant separately from the output and supply
conductors. If possible, in grounded conduits.
•
The power supply for electronic instruments must come from a network suitable for instrumentation.
•
The use of RC FILTERS (noise suppressors) in contactor coils, solenoids, etc. is recommended.
•
In control applications, you must consider what can happen when any part of the system fails. The built-in safety
features of the device do not guarantee total protection.
•
You must detach the terminal blocks from the device to make the electrical connections. Before you connect them,
make sure you have made the correct connections.
3.1.1
POWER SUPPLY CONNECTIONS
100~240 Vac/dc Model
24 Vdc/ac Model
3.1.2
INPUT CONNECTIONS
•
Thermocouples: Figure 10
shows the connection mode for thermocouple sensors. If you need to extend the thermocouple wires,
use appropriate compensating cables.
•
50 mV, 5 V and 10 V: Figure 11
shows the connection mode for 0-50 mV, 5 V and 10 V.
•
RTD (Pt100): Figure 12
shows the connection mode for the 3-wire Pt100. You should use conductors of the same gauge and length
to compensate for cable length. For 4-wire Pt100, you must leave one conductor disconnected at the controller. For 2-wire Pt100, use
short-circuited terminals 1 and 2.
•
0-20 mA and 4-20 mA: Figure 13
shows the connection mode for current signals
.
Thermocoupl
e connection
50 mV, 5 V and
10 V connections
3-wire Pt100 connections
0-20 mA and 4-20
mA connections
3.1.3
OUTPUT CONNECTIONS
Output A
connection (Voltage
Pulse)
Output B
connection (Relay)
3
INSTALLATION
