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Wiring
Figure 5. Thermocouple Input Wiring
Make sure that you are using the appropriate thermocouple
Thermocouple circuit
resistance should not
and extension wire. Connect the negative lead (generally
exceed 100 ohms for
colored red in ISA-type thermocouples) to contact #9;
rated accuracy; errors
connect the positive lead to contact #10. Extension wires
will occur at higher
must be the same polarity as the thermocouple.
resistance values.
If shielded thermo-
couple wire is used,
terminate the shield
8
only at one end.
9
10
Figure 6. RTD Wiring
The Series CN8200 accepts input from 2- or 3-wire, 100 ohm
platinum resistance temperature detectors (RTDs). Connect
2-wire RTDs to contacts #9 and #10, with a jumper across
contacts #8 and #10. Keep leads short and use heavy gauge
copper extension wire, if necessary, to minimize lead
resistance. For long runs, 3-wire RTDs should be used.
8
9
10
Note: For 2-Wire RTD
T/C
RTD
Jumper 8 & 10
Wiring
4
5
Figure 7. Process and Linear Input Wiring
Voltage Inputs: Connect the positive voltage input to contact
#10; the negative input to contact #9. Current Inputs: Connect
the positive current input to contact #10; the negative input to
contact #9.
8
(CURRENT
9
and VOLTAGE)
10
The Series CN8200 power supply accepts 100 to 250 Vac and
100 to 250 Vdc line power without any switch settings or
polarity considerations. All connections should be made in
accordance with the National Electrical Code and local
regulations, using only NEC Class 1 wiring for all power
terminals.
It is advisable, but not necessary, to fuse one leg of the
incoming power line, contact #11, with a 2AG, 0.5 amp rated
fuse. It is recommended that instrument power and load
power be fused independently.
Figure 8. Power Wiring Connection
3
8
11
12
4
9
5
10
L1
L2
100 - 250 V 50/60 Hz
100 - 250 Vdc (Auto Polarity)
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