SurgeX SX-1120-RT User Manual

SurgeX

Installation Instructions

SX1115RT and SX1120RT

Mounting

The SurgeX SX1115/1120RT are designed to be installed in a 19 inch equipment
rack and require one unit (1-U) of rack space. Remove the product from its
packaging and slide it into place in the rack being careful to feed the power cord
into the rack first and guide it so that it does not get caught or jammed as the
product is installed. Use the four screws provided with the product to secure the
rack ears to the rack rails. These screws can be tightened by hand and do not
require tools.

120 Volt Connections

Connect power to the unit by plugging the cord into a 120V ac receptacle. The
SX1120RT must be plugged into a 20 amp receptacle. If a 120V, 20 amp
receptacle is not available, you will need to have one installed by a licensed
electrical contractor.

The SX1115/1120RT have a total of 9 receptacles: six switched, two always on
and a front panel courtesy outlet. Each receptacle is rated for a maximum load of
15 amps, but the total load must not exceed 15 amps for the SX1115RT and 20
amps for the SX1120RT. Plug the equipment cords into the always-on and
switched receptacles as needed to power the equipment.

The always-on and courtesy receptacles provide power as long as power is
supplied to the SurgeX and the AC voltage is within normal limits. The six
switched outlets provide power only when the front panel switch is on and the
remote control input is also activated.

Indicator Lights

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– App

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The SX1115-RT and SX1120-RT have four indicator lights on the front panel. The
red Power light indicates that the power switch is turned on, power is applied to the
unit and the AC voltage is within normal limits. The orange Over/Under Voltage
Protection light indicates that the AC voltage is below 90 volts or above 145 volts.
The green Self-Test light indicates that power is applied to the unit and the internal
surge protection circuitry is fully functional. The yellow Remote light indicates
that the remote control is active and the rear switched receptacles are on.

CAUTION: Do not repeatedly turn an SX1115RT or an SX1120RT off—on—
off—on with a heavy load connected. The ICE™ circuitry absorbs the inrush
energy each time the unit is turned on and may overheat if this is done too
many times in a short period of time. Wait one minute between repeated turn­ons.

Remote Control

Remote control connections are wired to the green 7-pin plug-in Phoenix terminal
block on the rear of the unit next to the power cord. The terminal block is shipped
with a jumper wire between pins 1 & 2 so that the unit can be used without a
remote control connection. If you will be using remote control you will first need
to remove this jumper wire. You can unplug the terminal block to make
connections and after you have made the connections to the terminal block, plug it
back into the connector on the rear of the unit. Never solder (tin) wires before
inserting into a terminal block – solder cold flows and you will eventually have
loose connections!

The connections are as follows:

Pin 1 – Contact Closure
Pin 2
Pin 3
Pin 4
Pin 5
Pin 6 – Aux Relay Contact
Pin 7 – Aux Relay Contact

Contact Closure / Applied Voltage +

lied Voltage ­ Remote LED +
Remote LED -

Control Connections

Control of the switched receptacles can be accomplished by using a switch (contact
closure), another SurgeX product such as the SEQ, or by an applied voltage (5 to
30 volts DC). When using a switch, choose a switch with gold contacts for the best
long-term reliability. The most convenient way of controlling the unit is to use a
SurgeX switch plate which are available with either a rocker switch or a keylock
switch, and also include a red indicator light.

Connections are made to terminal block pins 1, 2 & 3 as follows:

• Connect switch contacts, a contact closure, or SurgeX control to pins 1 and 2.
Or:

• Connect an applied DC voltage to pins 2 and 3. The positive must be connected
to pin 2 and the negative must be connected to pin 3.

Remote Indicator LED

Connecting the Remote LED is optional. If you are using a SurgeX switch plate
which has a built in LED and resistor simply connect it as per the instructions
supplied with the switch plate. An LED connected to pins 4 and 5 will indicate
when the switched receptacles are on. 10mA of current is available at this output,
but you
a 1K resistor will provide suitable brightness. If you need less brightness use a
larger value of resistor, and if you need more brightness use a smaller value of
resistor.

must use a series resistor if you are using your own LED. For most LEDs

• Connect the LED positive wire to Pin 4

• Connect the LED negative wire to pin 5

Auxiliary Relay Contacts

The auxiliary relay contacts, pins 6 & 7, provide a way to cascade units or to
provide confirmation feedback to a central controller. When the switched
receptacles are on, the aux relay contacts are closed. There is a 1 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 the power to 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.