PMA-Relay S 3PH
from 60A to 210A
20
User Manual
9.2.
HB Alarm contact
The Relay S unit with HB option (if available), is supplied
with Heater Break alarm contact normally opened (NO):
• In normal conditions (without alarm) and with auxiliary
power supply, the contact to the terminals has opened
(relay coil energized).
• In alarm condition or without auxiliary power supply the
contact to the terminals is closed (relay coil not energized).
If you wish to change the alarm contact open the cover of
the Master module (first on the left with terminal block) and
set the jumper as shown in the next page,
don’t set the
other jumpers with factory settings.
Warning:
Before operate, be sure that power and control cables are isolated from
voltage sources.
