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FAQs for Discontinued Network Controllers

Sales FAQs

How are controllers powered?

There are three methods of providing power to the controller. The first two methods are done by passing power to the controller via the Ethernet cabling. The Basic series (NT10e/NT20e) require use of a Proliphix power injector known as a EPA-20 or EPA-60.

The Professional series (NT120e,/NT130e/etc.) and Thermal Management series (TM220e/TM250e) can use an EPA or it can be powered via Power over Ethernet (PoE) equipment.

The third method is using the HVAC power supplied by the HVAC wiring; this method is required for “h” powered controllers in the Professional series (NT120h/NT130h etc.) You must have not only the 24v source (usually a red wire) but also the "common" which is the other connection from the same 24v transformer on your HVACc system. the "common" is often times a black or blue wire. Remember that wire color is no guarantee of the function of the wire.

For testing purposes of powering an "h" model controller, you only need the 24v source and common to power up the controller.

“e” and “h” suffixed units are not interchangeable and you must use the correct series to match the power source.

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What is an EPA-20/EPA-60 and why do I need it?

EPA is an acronym for Ethernet Power Adapter. The EPA is a power injector and patch panel in one. The EPA injects power onto the CAT5 unused pairs to the “e” suffixed controllers. Without the EPA there is no power to the Basic series controller.

It also provides a patch panel from the controller to your Ethernet switch or router for network access. The EPA-60 is capable of powering up to 6 basic series controllers while the EPA-20 can work with up to 2 units. Note: EPA’s are not used when working with models with the “h” suffix.

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What material do I need in addition to the Proliphix controller?

First you should review the documentation on the Proliphix web site to become familiar with the installation and how to configure and access the controller. The following is not included with the controller:

  1. Philips screwdriver and drill (for optional wall mounting)
  2. CAT5 or CAT5e Ethernet cable unterminated to connect the controller to the EPA-20/60
  3. Punchdown tool for a 110 connector to install CAT5 cable onto the EPA-20/60
  4. CAT5 Ethernet cable terminated with RJ-45 connectors to connect the EPA-20/60 to your Ethernet router or switch
  5. DHCP server residing on either a router or PC
  6. A PC to be connected on the same network as the controller for configuration of the controller.

In addition to the above material if you are replacing an existing controller it will be necessary to pull CAT5 from the controller location to your EPA-20/60. This may require pulling CAT5 cable through the walls.

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Why do I need a CAT5 cable in addition to the HVAC cable?

The CAT5 cable provides Ethernet connectivity between the controller and your Ethernet switch or router, the Basic series, the Professional series and the Thermal Management series units require an Ethernet cable. Controllers with the “e” suffix also use the CAT5 cable to carry power to the controller.

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What is PoE?

PoE (Power over Ethernet) is an IEEE standard (802.3af) which provides a mechanism to distribute power over CAT5 cabling to PoE devices.

PoE routers, switches or midspan devices provide power to the device at the other end of the CAT5. However they cannot just supply power unconditionally since the device receiving the power may not be a PoE device. So there is a protocol to determine if the receiving device is PoE. If not, no power is supplied. If so, power is supplied to the device at the other end of the CAT5.

The difference between an EPA power injector and a PoE router or switch is the EPA supplies power unconditionally. The EPA is a CAT5 power injector not a PoE compliant device.

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Does your product support Fahrenheit and Celsius?

Yes, our product line of network controllers have support for both Fahrenheit as well as Celsius.

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What is the maximum length Cat5/5e/6 cable length which can be used?

The maximum length from the controller to the switch/hub/router is 100 meters (330 feet).

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Do I need a static IP address from my Internet provider to use the UEM?

No, you do not need a static address from your ISP. In a typical network configuration, you have a router which is the connecting point of two separate networks. The public network (Internet) is on the WAN (Wide Area Network) side of the router and your private network is on the LAN (Local Area Network) side of the router.

When we recommend that you set your controller to a static IP address it is because you need to have the controller always at the same address so the port forward entry in your router will always match the controller IP address. There is more detail on Port Forwarding in the Remote Access FAQ section.

On the WAN side of your network, we don't care if it is static or dhcp, because when you use the Proliphix Remote Server, we continually are updated with your WAN address when the controller contacts the server during its periodic update.

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Local Network Access FAQs

What do I need to do to access the web pages of my controller?

From an overview perspective, you need to do the following:

  1. Have power applied to the controller
  2. Have the physical Ethernet connection installed
  3. Have a working DHCP server on your network
  4. Get the IP address and port from the lcd display of the controller
  5. Using a pc on the same local are network as the controller, type in the IP address and port into your browser.

See the following questions for more information on this subject.

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How does my controller get an IP address?

Proliphix controllers are DHCP clients. When a controller initializes; it sends a request for an IP address to a DHCP server. The DHCP server responds and provides the controller with a unique IP address.

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What is a DHCP server?

A DHCP server provides unique IP addresses to computers or other networked devices on the same IP subnet network. The DHCP server guarantees that no two devices on the network will have the same IP addresses. This address resolution prevents IP collisions that can cause network problems.

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What is the difference between dynamic and static IP address?

The NT controller defaults to a dynamic IP address. Therefore it requires a DHCP server to resolve its IP address. The Dynamic address could be different each time the device does an IP address request. A static address does not change and therefore does not require a DHCP address resolution.

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Why do I need a DHCP server on my network?

The controller requires a DHCP server to be present on the network to provide the initial address resolution. Once the controller has an IP address you are able to access the unit by using your browser.

It is recommended that once you access the controller via the web pages, you should set your controller to a static IP address. This will ensure that your controller will always be at the same IP address when you try to access it.

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What else should I know about static addresses?

When your DHCP server gives you an IP address, it is from a pool of available addresses the DHCP server maintains. If you change your IP address method to static without changing the IP address to something outside the pool of available DHCP addresses, the DHCP server may assign another device the same address as your were given from the DHCP server. It is strongly recommended to set your static address outside the range of the DHCP pool. Here’s an example of this process:

If you have a Linksys router, you are most likely going to be given an IP address in the range of to This is because the default setting for most Linksys routers is to have 50 addresses available to the DHCP pool. When you change the controller IP address mode to static, you should set your IP address to something like to, this way you will not end up with two devices that have the same address.

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What does locally connecting to my controller mean?

Locally connecting to your controller means that your pc is on the same subnet as your controller and no routing is needed for the two devices to communicate with each other. For example, your controller has an IP address of and your pc has an IP address of The two devices are considered to be on the same network. All you would need to do is type in in the address field of your browser and you would then see the Proliphix web pages from your controller. In this example, there is no need for an active Internet connection to allow the pc to talk to the controller.

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How do I access my controller from a browser on my local PC?

The controller can be accessed through your LAN with a browser. You will need to know the IP address and the port number of the controller you are trying to view. To get the address from the controller, go to the lcd on the controller, select “Next” and then “Network Status” to display the current IP address and port for the controller. Type the address and port number into you browser address bar with the following format: . This can be bookmarked for future access.

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What browsers are supported?

We have tested our controllers with Microsoft’s Internet Explorer and Mozilla’s Firefox browsers. Safari on the Macintosh has been reported by end users to work, but we do not provide a Macintosh firmware upgrade utility. If you are a Macintosh user and need to perform an upgrade, you will need access to a Windows based pc.

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Controller Troubleshooting FAQs

I installed my controller and there is nothing on the display.

If you have nothing displayed on your controller then you are most likely not getting power to the controller. The first thing you have to do is ensure that the controller is properly mounted to the backplate. There are two tabs at the top of the controller that interconnect with the backplate, once you line those up, swing the controller down until the bottom tabs engage.

If you are using an EPA-20 or EPA-60 make sure the power adapter is plugged in to a live power outlet. Also, double check that your wires are punched down in the correct order according to the color codes as documented. You should also make sure that the wires are fully punched down into the EPA-20/60. Once you have verified those connections, you should also check the wiring on the backplate assembly of the controller and make sure the connections are in the right order and secure, making good contact with the screw heads on the backplate.

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My controller's display is working but I have no network link indication.

This is a typical indicator of a connection problem with your Ethernet wiring. Troubleshooti this in the same method as you would connecting a pc to your network. Verify your Ethernet cabling using a pc when possible and ensure that you can obtain an IP address from your DHCP server.

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Why do I get a "Connection Refused" during a software upgrade?

The most likely causes of a "Connection Refused" during a software upgrade are:

  1. Wrong IP address of the controller
  2. Wrong Port number of the controller
  3. A firewall application running on your pc is blocking access to the controller

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How do I perform a Factory Reset?

A Factory Reset is a procedure that is used to erase all user configuration from the controller. This will set the controller back to factory defaults which means you will have to re-establish connectivity in the same method as when the unit was first installed.

To perform a factory reset, do the following:

  1. Power down the controller (remove from backplate or disconnect power to the controller)
  2. Hold down the center bottom button while restoring power and continue to hold the button down until the LCD displays characters.
  3. Release the button and the controller has now been reset to factory defaults.

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Can I backup and restore my controllers configuration?

Currently, you can backup and restore your configuration by using the Upgrade Utility. Whenever you run the upgrade procedure, your configuration at the time of the upgrade is saved on the pc that ran the utility.

If you want to create a backup without upgrading your controller, select the Save Configuration option and the controller configuration will be saved to your hard drive.

If you want to restore the configuration at some point in the future, just run the utility and select Restore Configuration. You will be provided a list of configuration files that are date and time stamped and also includes the IP address of the controller that the configuration was obtained from.

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Why is my controller's IP address

By far, the most common reason the controller does not have a valid IP address is because of improper wiring. Once the wiring is confirmed to be correct, you should verify that you have a functioning DHCP server on your network. The easiest way to test this is to use a laptop or other pc and see if it is able to get an IP address via DHCP.

If you do not have a vaild DHCP server, there is a way to have the thermostat use a "fallback" address. The following method will work on NT series units running 2.5.x or great and on all TM series units.

To view the controller's IP address, press next and navigate to Network Status and press select. When you are looking at the controllers IP address, the left button will have the abort label above it. Once you can press it within 60 seconds it will fall back to an ip address of Once the controller is at that IP address, you can set your pc to the same subnet (169.254.111.x) and get web access to the controller's web server. Then you can access the network settings page and statically assign the IP address that you want.

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