SurgeX XR315 - Manual (Page 13)

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6.1.1 Controlling the XR315
The XR315 is primarily designed to be used with momentary action switches. A momentary
switch is a switch where the contacts are closed only while the switch is actually pressed, such as
a push switch. Using momentary switches allows several switches to be connected in parallel so
that the XR315 can be controlled from multiple locations. A single push switch would cause the
unit to power-up on the first press and then power down on the second press. A dual momentary
switch, such as a center-biased rocker, or two separate push switches (one for UP and the other
for DOWN), can also be used with equal versatility. It is up to the installer to choose the
configuration. Whatever type of switch is used, switches with gold contacts are recommended
for the best long-term reliability.
Where there are multiple control locations it is advantageous to use the 12V dc output to drive
LEDs so that there is an LED at each control location. Up to four LEDs running at 10mA each
can be powered from the 12V dc output. Each control location then has an indication of the
operational status of the XR315 regardless of which location last initiated power-up or power-
down.
The XR315 also supports latching switches, contact closure and applied DC voltage, but these
types of input cannot be used with multiple control locations – they are intended primarily for a
small system or for hook-up to a central controller. The front-panel push-button will not work
with a latching switch, contact closure or applied voltage inputs.
6.1.2 12V DC Output
The 12V dc output can be used to drive LEDs, thereby showing the operational status at remote
control locations. This output can drive up to 40mA which can power four LEDs at 10mA each,
or more LEDs at reduced current. A resistor is required for each LED to limit the current. The
12V dc output can also provide confirmation to a central controller or be used to drive a small
relay (40mA maximum coil current). The 12V dc output can be configured to control an external
bank of equipment as an alternative to or in additional to the aux relay. See section 3.2 for
connection details and section 5.3 for programming details.
The 12V dc output has a special use when XR315s are cascaded together – this is covered in the
section on cascaded systems.
6.1.3 Auxiliary Relay
The primary uses of the aux relay are to control other remote turn-on products or to provide
status feedback to a central controller to confirm that the unit has completed the requested
operation. Details of using the aux relay to control other products are covered in the specific
applications sections. The aux relay provides one normally-open contact at the rear terminal
block and can handle 1 amp at up to 30 volts dc. See section 3.2 for connection details and
section 5.4 for programming details.