![](https://gqt.gr/689/sb-593-keri-satellite-board.jpg)
The SB-593 Satellite Expansion Board plugs directly onto the PXL-500 to provide an additional 8 general purpose inputs and 4 general purpose outputs.
With a simple jumper setting, two of the inputs and two of the outputs are configured to economically manage a second door.
UL/CSA CERTIFICATION: The PXL-500 is UL certified under UL-508 (Control Equipment)
Satellite Board