Omega CNi16A, User Manual

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This device may also have a programmable communication output. The RS232
and RS485 Output Connection are shown below.
Figure 2.13
a) RS232 Output Wiring Hookup b) RS485 Output Wiring Hookup
This meter is capable of supplying 24 Vdc
sensor excitation. The excitation output
connection is shown below. This option is not
available for low voltage power supply.
If your meter has an excitation option,
then communication is not available.
Figure 2.14 Excitation Output
This meter has snubber circuits
designed to protect the contacts of
the mechanical relays when it
switches inductive loads (i.e.
solenoids, relays). These snubbers
are internally connected between the
Common (C) and Normally Open
(NO) relay contacts of Output 1 and
Output 2.
If you have an inductive load
connected between Common (C) and
Normally Closed (NC) contacts of the
mechanical relays and you want to
protect them from the rush current
during the switching period, you have
to connect an external snubber circuit
between Common (C) and
Normally Closed (NC) contacts as
indicated in the figure below.
14
Figure 2.15
Snubber Circuits Wiring Hookup