What is it?

The Stewart CVM masking / screen controller is a bi-directional device capable of controlling multiple motors while providing instant recall of pre-selected viewing settings. It can be controlled by the supplied dedicated wired keypad, serial communication, remote IR or IP (Internet Protocol). There are many 3rd party serial drivers available; AMX, Crestron, Control4, Savant, On Controls, RTI, etc.

Mounting

Secure the CVM control box to a location near the Stewart screen. The encoder signaling cables are length sensitive and therefore the control set must reside near the screen. The factory has pre-wired the motors and encoder lines to the control box. DO NOT CUT, SPLICE OR LENGTHEN THESE CABLES. Do not coil the excess encoder cables as this could lead to possible EMI causing control issues. Also, avoid placing encoder cables directly adjacent to motor’s AC power leads (do not use cable ties). 

How does it operate?

Plug in the CVM’s main AC power cord and wait approximately 30 seconds before sending any commands. This time frame allows the controller to perform an internal status check. The on board red, green & blue LED will cycle and when ready for normal keypad or serial operation you will see a steady blinking “blue” LED. If you are using IP control, this blinking LED will be “green”. At this time, you can begin to operate the CVM control system. For enhanced testing, control and bi-directional feedback, use the Pilot application software thru the IP port. 

The CVM board receives positioning signals from encoders that are mounted adjacent to the motors. The encoders track the position of the panels / screen sending signals back to the board. This positioning data is used to store preset stopping positions for panels / screen.  

Wired 11-Button Keypad

The dedicated CVM keypad is the quickest way to test, operate and control the masking motors. You can easily overwrite the preset masking positions / presets directly from the keypad. You simply move the panels and or screen to the desired stopping position and then depress a preset button for 4 seconds until you hear a slight "beeping" sound. Once the panels & screen are retracted or setting at a different position, a quick press and release of the newly assigned preset button will recall and move the motors accordingly. 

The keypad also contains the IR receiver should IR control be utilized. The supplied connection cable is a 4-conductor cable terminated with RJ-25 plugs. This factory cable must be replaced if the keypad is to reside at mounted positions further away from the CVM control box. Use Cat5 or 6e cables for runs up to 100 ft. We advise placing this keypad in a convenient location as it can be used as a backup to quickly test the motors / control system should 3^rd party or other control inputs be non-operational. The keypad’s RJ-25 input port (powered) is located in the middle of the switching side of the CVM. The second RJ-25 port (non-powered) directly to its right is reserved for “daisy-chaining” other CVM apparatus.

Serial Control

Using serial control from other 3rd party networks is easily obtained by connecting to the CVM's RJ-45 serial port. 3rd party serial control duplicates all the functions of the supplied 11-button keypad. When using serial control, the availability of additional presets is also obtained. Standard IP network cables connect the CVM serial port to outboard 3 party controllers.  

These settings are set at the factory and should not need to be changed.

CVM main control board and keypad