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6.2
Single Unit System
Most of the information necessary to install and set up a single unit system can be found in
sections 3.2 and 6.1. Figure 1 shows a single unit system controlled by momentary switches at
three different locations, and figure 2 shows a single unit controlled by a central controller.
6.3
Expanded System
A basic expanded system consists of a XR315 in combination with a remote turn-on SurgeX
such as the SX1120-RT or the SX20-NE/RT. The auxiliary relay inside the XR315 is normally
used to control the second unit although the 12V dc output can also be used for this purpose. The
only difference in these remote control configurations is that, when the aux relay is used to
control a second unit, it cannot be used for confirmation feedback to a central controller, and
when the 12V dc output is used for control it cannot be used to drive LEDs.
If more current capability is required then additional SurgeX RT products can be connected to
the second unit. Connect pins 6 & 7 of the second unit to pins 1 & 2 of the third unit, and so on.
It is possible to configure an expanded system by using both the aux relay and the 12V dc output
to simultaneously control two separate pieces of equipment or two racks of equipment. In this
case, refer to both figures 3 & 4 and follow the instructions below.
The XR315 in an expanded system can be controlled by the same inputs as a single unit system.
Figure 3 shows how the two units are wired together using the aux relay contacts. The aux relay
contacts on the XR315 (terminals 6 & 7) are connected to the contact closure inputs at the back
of the RT (terminals 1 & 2). The aux relay must be programmed accordingly. The Aux Output
menu item must be set to A, B or C. This synchronizes the aux relay to the internal trigger used
to turn on the receptacles on the rear panel of the XR315. The Aux Delay On and Aux Delay Off
delay times are then set to the desired turn-on and turn-off delays.
If an over-ride is used with an expanded system do not use the Special Delay.
Figure 4 shows how to configure an expanded system using the 12V dc output instead of the aux
relay to control external units. This option allows the aux relay to be used for confirmation but it
is then no longer possible to drive external LEDs from the 12V dc output. The programming and
delay timing set up follow the same concepts as for the aux relay which is explained above.
6.4
Ganged System
A ganged system consists of two or more XR315s connected together in such a way that they all
turn off and on together. Figure 5 shows how to connect and program each unit in a three-unit
system. If only two units are to be ganged together then ignore the middle unit in the diagram. If
more than three units are to be ganged together then keep the first and last units set up as shown,
add units in the middle and set them up and connect them in the same way as the middle unit in
the diagram.
