XR Expansion Modules Control up to 256 Relays with any ProXR Controller XR Expansion XR Expansion Boards will allow you to add up to a total of 256 relays using the XR Port on your controller.  These Expansion Boards are only compatible with ProXR series boards and are not able to work on their own.  They get their instructions from the main controller. Summary of XR Modules Compatible with ProXR Series Controllers ONLY Not a stand-alone controller - MUST be used with a ProXR Series Controller Add up to 256 Relays to any ProXR Controller Includes 6" XR Expansion Cable Different Types of XR Expansion Modules can be Chained Together Onboard Relay Status LEDs Available with SPST, SPDT, DPDT, High-Current and Signal Switching Relays Power LEDs Optional Power Supply ZB ZigBee Devices offer Unparalleled Dynamic Networking and Adaptability. Simply power up a ZB ZigBee Device in Range of a Coordinator or a Networked Router and the network will automatically Associate itself with that Device.   XR Expansion Modules XR Expansion Boards have no on-board brains.  They are entirely reliant on the brains of a "master" device.  A master device is an NCD controller with an XR expansion port and a microprocessor of some kind.  Some master devices are wireless, and some master devices have digital I/O and analog to digital conversion capabilities.  Some master devices also have on-board relays.  The main purpose of the XR port is to add relays to the main controller.  When you run out of relays, simply plug in an XR expansion controller that is equipped with the kind of relays you need.  All XR Expansion modules are compatible with each other so if you want to add different types of relays you can.  For controllers that are equipped with an XR Expansion port (and are suitable master devices for XR Series Expansion Controllers) simply look for PROXR in the part number. UXP Expansion Modules Like the XR Expansion Modules the UXP Expansion Boards have no on-board brains.  They are entirely reliant on the brains of a "master" device.  The difference with he UXP Expansion is you don't have the ability to add relays with this port but to add applications to a controller (must be a UXP controller).  If you need to add Analog to Digital Conversion (A/D), Contact Closure Inputs or Digital Potentiometers just plug in the appropriate expansion module to a board that is equipped with a UXP Expansion Port.  You cannot daisy chain different types of modules to the same controller however. In other words if you plug in a potentiometer you will not be able to plug a contact closure or A/D module also.   For controllers that are equipped with a UXP Expansion port (and are suitable master devices for UXP Series Expansion) simply look for UXP in the part number.  All UXP Expansion Modules have an input and an output so you can simply daisy chain the boards together until you reach the number of contacts you are looking for.     Articles New to ZB ZigBee Networking? Click the following links for helpful wireless articles to get you started. Introduction to Computer Control XR Expansion Latching Relay Boards Code Name Image Price   XR1620HP Low Cost Expansion Relay Board with 16 20-Amp High Power Relays $254.00 XR165 Expansion Relay Board with 16 5-Amp SPDT Relays $209.00 XR1610 Expansion Relay Board with 16 10-Amp SPDT Relays $249.00 XR16OCLP XR Expansion Module 16-Channel Low Power Open Collector $89.00 XR241DPDT 24-Channel 1A DPDT Expansion Relay Board $343.00 XR243DPDT 24-Channel 3A DPDT Expansion Relay Board $403.00 XR245DPDT 24-Channel 5A DPDT Expansion Relay Board $463.00 XR245 24-Channel 5A SPDT Expansion Relay Board $304.00 XR2410 24-Channel 10A SPDT Expansion Relay Board $364.00 XR321DPDT 32-Channel 1A DPDT Expansion Relay Board $474.00 XR323DPDT 32-Channel 3A DPDT Expansio Relay Board $554.00 XR325DPDT 32-Channel 5A DPDT Expansion Relay Board $634.00 XR325 32-Channel 5A SPDT Expansion Relay Board $399.00 XR3210 32-Channel 10A SPDT Expansion Relay Board $479.00 XR161DPDT 16-Channel 1A DPDT Expansion Latching Relay Board $212.00 XR163DPDT 16-Channel 3A DPDT Expansion Relay Board $252.00 XR165DPDT 16-Channel 5A DPDT Expansion Relay Board $292.00 XR45 Expansion Relay Board with 4 5-Amp SPDT Relays $89.00 XR410 Expansion Relay Board with 4 10-Amp SPDT Relays $99.00 XR85 Expansion Relay Board with 8 5-Amp SPDT Relays $129.00 XR810 Expansion Relay Board with 8 10-Amp SPDT Relays $149.00 XR41DPDT 4-Channel 1A DPDT Expansion Relay Board $89.00 XR43DPDT 4-Channel 3A DPDT Expansion Relay Board $99.00 XR45DPDT 4-Channel 5A DPDT Expansion Relay Board $109.00 XR81DPDT 8-Channel 1A DPDT Expansion Relay Board $119.00 XR83DPDT 8-Channel 3A DPDT Expansion Relay Board $139.00 XR85DPDT 8-Channel 5A DPDT Expansion Relay Board $159.00 XR420HP Low Cost 4-Channel 20A SPDT Expansion Relay Board $114.00 XR420 4-Channel 20A SPDT Expansion Relay Board $139.00 XR430 4-Channel 30A SPST Expansion Relay Board $159.00 XR820 8-Channel 20A SPDT Expansion Relay Board $199.00 XR830 8-Channel 30A SPST Expansion Relay Board $239.00