This is for ONE NX-200 Zone Doubling Resistor Kit for NetworX Series Panels. Zone Doubling Resistor Kit allows doubling of the panel’s on-board hardwire capacity. Includes (100) 3.74 K and (100) 6.98 K Ohm. Compatible with Alarm Control Panels by Interlogix /UTC & General Electric (GE) & CADDX NetworX Series Alarm Control Panels Including. NX-4, NX-6, NX-8 & NX-8E. GE & CADDX is Now. UTC Fire & Safety Interlogix. GE NetworX Intrusion & Property Protection Systems. The NX-200 is a zone doubling resistor kit from Interlogix which is designed to allow the number of zones on certain types of NetworX control panels to be doubled with certain restrictions depending on the particular control panel used. The NX-200 doubling resistor kit comes with (100) 3.74 Ohms, and (100) 6.98 Ohm resistors. WHEN USED WITH NX8 / NX8E CONTROL PANELS This feature allows you to use the eight zones on the panel as sixteen normally closed zones. When this feature is used European double E. Configuration cannot be used on the first sixteen zones. THIS FEATURE DOES NOT INCREASE THE TOTAL NUMBER OF AVAILABLE ZONES BEYOND 48. If one of the sixteen zones must be a fire zone, it must be one of zones 1 to 8. The corresponding upper zone will become unavailable. For example, if zone 6 is a fire zone, then zone 14 will not be available. WHEN USED WITH NX6 CONTROL PANELS This feature allows you to use the six zones on the panel as twelve normally closed zones. When this feature is used, zone seven cannot be a two-wire smoke zone, and European double E. Configuration cannot be used. THIS FEATURE DOES NOT INCREASE THE TOTAL NUMBER OF AVAILABLE ZONES BEYOND 16. Zones 7 – 12 should not be programmed as “Fire” zone types when Zone Doubling is used. If one of the twelve zones must be a fire zone, it must be one of zones 1 to 6. For example, if zone 6 is a fire zone, then zone 12 will not be available. WHEN USED WITH NX4 CONTROL PANELS Zone doubling can only be enabled when at least one other device is added to the basic system (consisting of the main control panel and one keypad). Additional devices can include wireless receivers, extra keypads, etc. If enabled, this feature allows you to use the four zones on the panel as eight normally closed zones. When this feature is used, European double E. THIS FEATURE DOES NOT INCREASE THE TOTAL NUMBER OF AVAILABLE ZONES BEYOND 8. If one of the eight zones must be a fire zone, it must be one of zones 1 – 4. For example, if zone 4 is a fire zone, then zone 8 will not be available. REFER TO PROGRAMMING LOCATION 37 IN THE INSTALLATION MANUALS FOR FURTHER INSTRUCTIONS. Please request an invoice before paying if combining with items from our other listings.