** non-stocking item **
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Technovision manufactures a 4 to 1 vertical interval switcher with RS232 and TTL control. The switcher comes standard with RS232 and 2 or 4 wire TTL control via a male DB9 connector on the back of the unit. In 4 wire mode the switcher can be controlled with external momentary contact closures.
The 421VS is also compact (8.25" wide x 2" high x 3.5" deep) and comes standard in a desktop configuration, though rack mount kits are also available (421VS-RACK).
The 421VS comes standard with a composite sync output which eliminates the need to buy an external synch generator to lock the incoming signals.
In addition to the RS232 port for external control the 421VS has an additional RS232 port for custom applications such as controlling, and switching, two RS232 devices. Technovision can provide custom developed firmware for the 421VS if you require features not standard with the unit.
421VS Operating Guide
CUE2T Firmware guide
120VAC / 60Hz
(12VDC, 800mA power adapter included)
854 g. (1.88 lbs.)
64 x 211 x 90mm (2.5" x 8.25" x 3.5")
32 to +132 deg. F (0 to +50 deg. C)
0 to 90 % non-condensing
421VS External Control
Protocol: 9600 BAUD, NO PARITY, 8 BITS, 1 STOP.
To select input 1, 2, 3 or 4 send the ASCII character "0", "1", "2" or "3"
2 bit (line) TTL control (ACTIVE LOW)
4 bit (line) TTL control (ACTIVE LOW)