SurgeX SX-20NE-RT-AR - Manual (Page 8)

SX-20NE-RT-AR User Manual
Page 7
IV. Remote Control Connections
(continued)
b) Contact Closure/Latching Switch: The unit will power up when the contacts are closed,
and power down when the contacts are open. Connect the two wires from the contacts
or switch to Pin 1 (Contact Closure) and Pin 2 (Contact Closure).
Output control requires a combination of Axess Ready (AR) control via IP and Remote Turn-
On/Off (RT) control via hard-wired connection. The following table will detail the LED and output
states during various operating conditions.
Control State Output State
Axess
Control CC
Input DC
Input Axess
LED Remote
LED Out
put
On On Off On On On
On Off On On On On
On Off Off On Off Off
Off Any Any Off Off Off
External LED Connections
The SX-20NE-RT-AR product is able to drive external LEDs or other signaling devices through
its 12V DC LED outputs, which can provide up to 10mA of current each. External LEDs
connected to the Power LED pins (5 and 6) will be illuminated when AC power is applied to the
unit, and external LEDs connected to the Remote LED pins (7 and 8) will be On when the unit’s
AC output is On, and Off when the output is Off. When connecting LEDs to either output, a
series resistor is required. For example, many LEDs work well with 10mA of current, so a 1KΩ
resistor is usually a good choice. If more than one LED is required, then use a separate series
resistor for each LED. For example, two external LEDs, each with a 2kΩ series resistor, could
be powered from one unit at 5mA each.
Connect each LED anode to “LED +” through a resistor, and the cathodes to “LED -”.
Auxiliary Relay Contacts
The auxiliary relay contacts, Pins 9 & 10, provide a way to cascade units or to provide
confirmation feedback to a central controller. When the output is On, the aux relay contacts are
closed. There is a ½ second delay before the aux relay closes, which allows 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 the power to several large loads (such as
amplifiers) because of inrush current. SurgeX SX-20NE-RT-AR products, when cascaded, can
turn on a bank of large amplifiers with no inrush current, and therefore no risk of tripping a circuit
breaker.
To cascade two or more SX-20NE-RT-AR 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.