SurgeX SX-20NE-RT - Manual (Page 3)

Auxiliary Relay Contacts
The auxiliary relay contacts, labeled REL CONT on the terminal block, provide a
way to cascade units or to provide confirmation feedback to a central controller.
When the AC power is on, the aux relay contacts are closed. There is a ½ second
delay before the aux relay closes which gives time for the SurgeX Inrush Current
Elimination (ICE™) circuit to operate. This short delay in combination with the
SurgeX ICE™ makes it unnecessary to sequence on several large loads (such as
amplifiers) because of inrush current. SurgeX RT products, when cascaded, can
turn on a bank of large amplifiers with no inrush current, and therefore no risk of
blowing a circuit breaker.
To cascade two or more RT products, connect the aux relay contacts of one unit to
the contact closure input of the next unit.
To provide confirmation feedback, connect the aux relay contacts to an input on
the central controller.
The relay contacts are rated for 1 amp at 30 V DC.