XR Expansion Board 16-Channel Low Power Open Collector
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Highlights
- Onboard Open Collector Status LEDs
- Screw Terminal Connectors
- Power LEDs
- 2.1mm Power Connector
- Optional Power Supply
- Includes 6″ XR Expansion Cable
- OC Outputs Allow Control of External Relays and Contactors
ProXR Expandability
ProXR Controllers were built with relay expansion in mind. Easily add different types of relays for high-power, signal, general purpose, or solid-state switching. The XR Expansion Port allows you to also add expansion boards and control up to 256 relays.
Above: A 4-channel ProXR Series Controller (bottom) shown with an 8-channel expansion board attached.
Simply chain the XR Expansion Modules, one after another, to add additional relays to any ProXR board up to 256 relays.
XR Expansion Port
XR Relay Expansion Controllers add a large variety of relay switching capabilities to an existing NCD ProXR series controller.
The XR Expansion Port is used to add banks of external relays to a ProXR Controller equipped with a XR Expansion port. As we continue to develop new devices, a modular architecture will be implemented, offering the greatest amount of user flexibility.
Controlling XR Expansion Banks
FXR Expansion Boards have no on-board brains. They are entirely reliant on the brains of a “master” ProXR device. The XR Expansion Modules have many possibilities:
- Adds up to 256 Relays to a ProXR Series Controllers
- Mix and Match Relay Types to Suite your Application Needs
- Choose Between Mechanical and Solid-State Relay Types
- Choose DPDT Relays for Signal Switching Applications
Linking XR Expansion Boards Together
XR Expansion Controllers consist of a XR Input and XR Output Connector. Simply connect the XR Output of your ProXR Controller to the XR Input located on the relay expansion board. Chaining more relays is easy. Simply connect the XR Output of your ProXR expansion board to the XR Input of your next relay expansion. Mix and Match different relay types as your application requires.
We always include a 6″ expansion cable with your expansion board. We can provide longer cables if needed, but it’s important to keep the cabling as short as possible. Not all users will be able to expand to 256 total relays, as it all depends on the installation, the amount of electrical interference, and the overall cable length. For best compatibility, the total length of the ProXR controller and all of the expansions and cabling should not exceed 1 or 2 meters.
Mechanical Drawing
ProXR vs. ProXR Lite
ProXR controllers include a XR Expansion port. This controller will plug into the XR expansion port of your ProXR series controller. ProXR Lite controllers do not include a XR Expansion port; therefore, this expansion will not work with ProXR Lite series controllers.
XR vs. FXR Expansions
XR and FXR expansions are very similar, but are not directly compatible with each other. The FXR expansion port is an updated version of XR, which includes a right-angle connector to support our metal enclosures. The FXR cable is also capable of carrying I2C data. Because of the right-angle connector, the polarity of the cable is not compatible with XR expansions.
Maximum Relay Rating Notes
ProXR is capable of expanding to an absolute maximum of 256 Relays. In some cases, it may not be possible to control all 256 relays, particularly in applications where high noise levels may be involved. Experimentation may be required, as it is not possible for us to guarantee all users will be able to utilize all 256 relays in every application. Noise tends to accumulate when several expansions are connected together. For best results, the XR expansion cables must be as short as possible. The typical total length of ProXR and all of its expansions and cabling should not exceed 1 or 2 meters.