Wintriss WPC 1000, Руководство пользователя

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1125100 WPC 1000 User Manual
2-38 Installation
3.
To reduce electrical noise and extend the life of the relays, do the following:
a. Install arc suppressors across each inductive AC load (motors, coils, etc.) that is
connected to a cam relay. Suppressors are supplied with your WPC 1000 cam outputs.
Install the suppressors across the load or as close to the load as possible. Attach
suppressors by connecting leads across existing terminals or junction points.
Figure 2-20, below, shows the correct way to install suppressors.
b. Install a diode across each DC load, such as relays, solenoids and PLC inputs, as
shown in Figure 2-21, page 2-39.
SUPPRESSORS INSTALLED ACROSS RELAY CONTACTS
DO NOT install suppressors across the relay contacts in the cam output assembly. If a
suppressor is installed across the relay contacts and the relay fails shorted, the equipment
controlled by that relay will remain energized.
Failure to comply with these instructions could result in death or serious injury.
Figure 2-20. Installing a Suppressor across an AC Load
WARNING
!
RIGHT
WRONG
ACCEPTABLE
not recommended
c n/o
Power
in
Power
Return
Suppressor
Relay
c n/o
Power
in
Suppressor
Power
Return
Power
Return
Relay
c n/o
Power
in
Suppressor
Power
Return
Relay