The GEMC-BSLC-1PT is single-point expansion module. Terminals are provided for one supervised zone supporting normally-closed or normally-open contacts. Each expansion module has a unique factory-programmed code (printed on the label located on the rear case) that distinguishes itself to the receiver. (Note: See control-panel instructions for entering this six-digit hexadecimal code into the panel; be sure to enter all numbers and/or letters, including leading zeros, if any).