10
This device has snubber circuits designed to
protect the contacts of the mechanical relays
when it switches to 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
Figure 2.8
.
This device may have a programmable communication output. The RS-232 and
RS-485 Output Connection are shown below.
External RS-232 connections are not available with -EI or C4EI options.
Figure 2.9
a) RS-232 Output Wiring Hookup b) RS-485 Output Wiring Hookup
This device may also have an excitation output.
Figure 2.10 Excitation Output
Figure 2.8
Snubber Circuits Wiring
Hookup
Excitation is not available if Serial
Communication (-C24) or Ethernet
(-C4EI) or Low Voltage Power
Supply (-DC) option is installed.