Electrical Installation; General Requirements - Omega Engineering CN9400 User Manual

OUTPUT DEVICES
Two of the following output devices are fitted to the controllers,
depending on the model.
1 Solid state relay drive (SSd/SSd1/SSd2)
5Vdc +0/-15%, 15mA non isolating
To switch a remote SSR (or logic)
2 Miniature power relay (rLY/rLY1)
2A/250V resistive, Form A/SPST contacts.
3 Sub miniature power relay (rLY2)
1A/250V resistive, Form A/SPST contacts.
OUTPUT DEVICE ALLOCATION
Either of the available outputs may be chosen for the main setpoint
(SP1), the remaining device being automatically allocated to the
second setpoint (SP2).
See example illustrated on page 30.
STANDARD MODEL CN9412
Output Device 1 + Output Device 2
DUAL RELAY MODEL CN9411
Output Device 2 + Output Device 3
DUAL SSd MODEL CN9422
Output Device 1 + Output Device 1
Dual relay or dual SSd model options CN9411 / CN9422 are fully
detailed on page 22.

ELECTRICAL INSTALLATION

Designed for use with the following supply voltages:
100 - 240V 50-60 Hz 4.0 VA (nominal)
+/-10% maximum permitted fluctuation
12V - 24V (AC/DC) +/-20% 4.5 VA Polarity not required
WIRING THE CONNECTOR
Prepare the cable carefully, remove a maximum of 8mm insulation
and ideally tin to avoid bridging. Prevent excessive cable strain.
Maximum recommended wire size: 32/0.2mm 1.0mm
INDUCTIVE LOADS
To prolong relay contact life and suppress interference it is
recommended engineering practice to fit a snubber
(0.1uf/100 ohms), refer to illustration on page 30.
CAUTION:
Snubber leakage current can cause some electro-mechanical
devices to be held ON. Check with the manufacturers
specifications.
2 (18AWG).
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