Athena 18C Series, Руководство по эксплуатации

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WIRING
IMPORTANT: All electrical wiring connections should be made only by trained personnel, and in strict accordance
with the National Electrical Code and local regulations.
The Series C controller has built-in circuitry to reduce the effects of electrical noise (RFI) from various sources.
However, power and signal wires should always be kept separate. We recommend separating connecting wires
into bundles: power; signal; alarms; and outputs. These bundles should then be routed through individual conduits.
Shielded sensor cables should always be terminated at one end only.
If additional RFI attenuation is required, noise suppression devices such as an R.C. snubber at the external noise
source may be used. If you wish, you may order this suppressor directly from Athena, part number 235Z005U01.
Figure 4. Contact Identification
Thermocouple circuit resistance should not exceed 100 ohms for rated accuracy; errors will occur at higher resistance values. If shielded thermocouple
wire is used, terminate the shield only at one end.
Make sure that you are using the appropriate thermocouple and extension wire.
Connect the negative lead (generally colored red in ISA-type thermocouples) to
contact #19; connect the positive lead to contact #20. Extension wires must be the
same polarity as the thermocouple.
Figure 5. Thermocouple Input Wiring
The Series C accepts input from 2- or 3-wire, 100 ohm platinum resistance temperaure
detectors (RTDs). Connect 2-wire RTDs to contacts #19 and #20, with a jumper across
contacts #18 and #20. 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.
Figure 6. RTD Wiring