Wintriss SmartPAC PRO Servo, User Manual

Page: 54 / 228

1147100 SmartPAC PRO Servo User Manual
54 Chapter 2
– Installation
Table 2-9. Connections to Relays
Module How to Connect Type
Electro-mechanical Relay One wire to C, one wire to N/O or
N/C, polarity does not matter SPDT
DC Solid State
– to C, + to N/O
SPST
AC Solid State One wire to C, one wire to N/O,
polarity does not matter SPST
INCORRECT SUPPRESSOR INSTALLATION MAY CAUSE RELAYS TO REMAIN ENERGIZED
Ensure that suppressors are correctly installed. They must not be installed across the relay
contacts inside the ProCamPAC Output enclosure. If a suppressor is installed across the relay
contacts and it fails shorted, the equipment controlled by that relay will remain energized.
Failure to comply with these instructions could result in death or serious injury.
11. To reduce electrical noise and to extend the life of the relays, do the following:
a. AC loads: Install arc suppressors across each inductive load (motors, coils, etc.) that is
connected to a cam relay (see Figure 2-17). Suppressors are supplied with each relay. 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.
b. DC loads: Install a diode across each DC load, such as relays, solenoids and PLC inputs (see
Figure 2-18).
Figure 2-17. Install Suppressors
Across AC Loads
Figure 2-18. Installing a Diode
Across a DC Load