DNF Controls SW2X1 - Manual (Page 4)

SW2X1 User Manual 4 of 15
1. STANDARD FEATURES
The SW2X1, Electronic A / B switch has 2 buffered inputs and one
buffered output for easy interfacing. There are no mechanical multi-pole
switches to wear out or fail.
Front panel control and remote control provide flexible operation to fit
your specific application.
Quickly and easily switch from primary system to backup system at the
press of a button.
In the event of power failure, on-board bypass relays switches “A” input to
output.
2. INSTALLATION SW2X1-GPI
a. Chose whether the GPI will be self powered or have power supplied by
the source equipment. Each GPI is independently settable.
JUMPERS: J1 – J8 Revision 08/16/07
DRY: External circuit powers
INPUT opto-isolator
INPUT is isolated from other inputs
Place jumper over pins 2 and 3
WET: SW2X1 powers INPUT opto-
isolator
External circuit provides path to
ground
Place jumper over pins 1 and 2