Signal (Cn63300); Power Wiring; Control And Alarm Outputs; Relay Connections - Omega CN63100 Series User Manual

Signal (CN63300)

When connecting signal
leads, be certain that the
connect ions are clean and
tight. For voltage signals, use
terminal #8 for common and
terminal #9 for signal. For
current signals, use terminal
#8 for common and terminal
# 1 0 f o r s i g n al . Th e s e
c o n n e c ti o n s a re s h o w n in
Figure 6 . Multicontroller
applications using the same
signal source are possible, by
connecting current signals in
series, and voltage signals in
parallel.

POWER WIRING

AC Power
Primary AC power is connected to terminals #11 and #12, labeled AC. To
reduce the chance of noise spikes entering the AC line and affecting the
controller, an AC feed separate from that of the load should be used to power
the controller. Be certain that the AC power to the controller is relatively
"clean" and within the variation limit. Connecting power from heavily loaded
circuits or circuits that also power loads that cycle on and off, (contacts,
relays, motors, etc.) should be avoided.
DC Power
DC power (18 to 36 VDC) is connected to terminals #11 and #12 labeled
DC+ and DC- respectively.
CAUTION: Observe proper polarity when connecting DC voltages.
Damage to the unit may occur if polarity is reversed.
Figure 6, CN63300 Signal Connection

CONTROL AND ALARM OUTPUTS

For CN63100 heating, cooling, and alarms, there are up to two types of
ON/OFF outputs. These outputs can be relay, or logic for control or alarm
purposes. Relay outputs can switch user applied AC or DC voltages.
Logic/SSR drive outputs supply power to external SSR power units. One
Logic/SSR Drive output can control up to four SSR power units at one time.
The CN63300 is only available with relay outputs. Terminal numbers for the
outputs and output types vary from model to model. Refer to the Rear
Terminal Assignment Tables or the label on the controller for the terminal
numbers corresponding to the model being wired.

Relay Connections

To prolong contact life and suppress electrical noise interference due to the
switching of inductive loads, it is good installation practice to install a snubber
across the contactor. Follow the manufacturer's instructions for installation.
Note: Snubber leakage current can cause some electromechanical devices to be
held ON.
Relay Outputs:
Type: Form-A
Rating: 3 Amps @ 250 VAC or 30 VDC (resistive load).
Life Expectancy: 100,000 cycles at maximum load rating. (Decreasing
load and/or increasing cycle time, increases life expectancy).
Figure 7, Relay Output
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