HomeVision-Pro Description


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Comparison with HomeVision

The best way to understand HomeVision-Pro is to first become familiar with our HomeVision controller. The following list summarizes the differences between HomeVision-Pro and HomeVision.  Because of the many additional features and higher production cost of HomeVision-Pro, its street price is about 50% higher than HomeVision's.

bulletHomeVision-Pro is mounted in an alarm-type enclosure. The steel, beige-colored enclosure measures 14" x 13" x 3" (note that the photo above was taken with an enclosure of 11.25” x 11.25” x 3.0”).
bulletHomeVision-Pro contains three user-controllable serial ports. The primary serial port is the same as on HomeVision. In addition, all the capabilities of two HomeVision-Serial devices are built into HomeVision-Pro. You cannot use external HomeVision-Serial devices with HomeVision-Pro. Therefore, the maximum number of serial ports remains at four (three built into HomeVision-Pro, plus one on the HomeVision-Phone/Serial device).
bulletHomeVision-Pro also contains another serial port that will be dedicated to special functions (the user cannot control it like the other serial ports). We are currently considering how best to use this port.
bulletHomeVision-Pro contains a USB-to-serial adapter. This can be used on the main HomeVision-Pro serial port to connect to a PC USB port instead of a PC serial port. If you don’t use the USB-to-serial adapter for this main port, it can be connected to one of the additional serial ports HomeVision-Pro provides.
bulletHomeVision-Pro contains four analog inputs. These provide the same capabilities as the analog inputs on the Multifunction Expansion Board. When using HomeVision-Pro, you can now have a total of 20 analog inputs (four on HomeVision-Pro plus 16 on two Multifunction Expansion Boards).
bulletHomeVision-Pro supports digital temperature sensors and has an improved drive circuit. You no longer need a Multifunction Expansion Board (MFEB) to use the digital temperature sensors (the MFEB digital temperature sensor interface is disabled when used with HomeVision-Pro). The HomeVision-Pro drive circuit is improved over the one on the MFEB, and allows driving longer cables.
bulletHomeVision-Pro output Port A provides eight Single-Pole-Double-Throw (SPDT) power relays. Relays are rated for 10Amps at 125VAC, 6Amps at 277VAC, and 5Amps at 100VDC.
bulletHomeVision-Pro input Port B contains switches to individually enable or disable “pull-up” resistors. HomeVision contains pull-up resistors that make the inputs go high when nothing is connected. This makes connecting “contact closure” inputs easy. However, when connecting a voltage source, it is often necessary to add an external resistor to overcome the built-in pullup resistor. The HomeVision-Pro switches simplify connections by allowing you to disable the built-in pullup resistors instead of adding external resistors.
bulletHomeVision-Pro has an infrared receive input jack (in addition to the two built-in infrared receivers standard on HomeVision).
bulletThe HomeVision-Pro infrared output is available at a terminal block as well as an infrared output jack.
bulletThe HomeVision-Pro infrared output is a 12V signal instead of the 5V signal used on HomeVision. It provides higher current capability and is easier to connect to some IR distribution systems.
bulletThe built-in infrared emitter standard on HomeVision has been removed from HomeVision-Pro.
bulletHomeVision-Pro provides additional terminal block connection points for power, ground, and other functions. There are a total of 60 terminal block positions.
bulletThe HomeVision-Pro battery is a standard coin type that can easily be replaced by the user if needed.
bulletHomeVision-Pro can connect directly to the Sylva input/output boards. Unlike HomeVision, it does not require a Multifunction Expansion Board in order to connect to these Sylva boards.
bulletHomeVision-Pro has an enhanced memory architecture that allows the processor to access more RAM than HomeVision. This makes it easier for HomeVision-Pro to provide additional features in the future.
bulletHomeVision-Pro will function slightly faster than HomeVision.
bulletHomeVision-Pro provides connectors and board space for a future expansion board (to provide Ethernet functions as well as other capabilities).
bulletSchedules created in the HomeVision software can be read by the HomeVision-Pro software.
bulletHomeVision-Pro requires a regulated 12VDC, 1.25A power supply.
bulletHomeVision-Pro contains a total of 43 status LEDs to help you see exactly what is happening. HomeVision-Pro does not contain a "user LED" like HomeVision does. The HomeVision-Pro LEDs are:
bullet24 LEDs on each of the 24 digital I/O ports
bulletOne transmit and one receive LED on each of the 3 serial ports and the USB port
bulletOne digital temperature sensor status LED
bulletOne power indicator LED
bulletThree X-10 status LEDs
bulletTwo infrared status LEDs
bulletFour processor status LEDs

See these web pages to download the complete HomeVision-Pro documentation and software:>

bulletSoftware (FREE!)


HomeVision-Pro Specifications

Feature Specification
# of flags, variables, timers, scheduled events, periodic events, IR signals, and macros 255 each
Maximum schedule length 8000 (or more) lines
Data log size 64K bytes
TV event log size 256 lines
Port A (8 relays) ratings Single-Pole-Double-Throw (SPDT) power relays for 10Amps at 125VAC, 6Amps at 277VAC, and 5Amps at 100VDC
Port B (8 digital inputs) ratings +/-30VDC, pulled-up via resistor (which can be disabled with switches)
Port C (8-input configuration) ratings 0 to 5VDC, pulled-up
Port C (8-output configuration) ratings 0 and 5VDC at 20mA
System status LEDs 43
Video output Color NTSC video standard (PAL video on international units)
Serial ports Three ports.  One supports RS-232 only.  The other two support RS-232, RS-485 half-duplex (two-wire mode), and RS-485 full-duplex (four-wire mode).  All support baud rates of 300, 600, 1200, 2400, 4800, 9600, 19200 and 57600.  All use standard communication settings of 8 data bits, 1 start bit, 1 stop bit, and no parity.
USB port One. When used, one of the serial ports is not available.
Analog inputs (4) 0 to 5 VDC, 8-bit resolution
Digital temperature sensor interface Up to 64 sensors can be connected to the same three wires. Each sensor has it's own unique address so it can be individually read. Temperature range of -50 to +205 degrees F. 1 degree F resolution. 15 sensors can be automatically read per second.
Dimensions 14" x 13 x 3"
Required power source 12VDC, 1.2Amps.  2.1mm plug with center positive
Maximum number of Multifunction Expansion Boards 2
PC operating system Windows 3.1, 3.11, 95, 98, 2000, NT, or XP
Recommended PC 486, 90MHz, 32M Bytes RAM, VGA monitor or better, hard disk with 6M Bytes free, one serial port or USB port.


Hardware Interface Limits

The following table shows the maximum number of hardware interfaces you can have with HomeVision-Pro. It also shows which HomeVision-Pro accessories are needed to provide these.

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Hardware Feature

Maximum Number Available

Base HomeVision-Pro Unit

Multifunction Expansion Boards (2 max)

Sylva I/O Boards
(4 max)

(1 max)

(1 max)

+/-30V digital inputs



8 each
(16 max)

0 to 5V digital inputs 32


16 each
(32 max)
Opto-isolated digital inputs




8 each
(32 max)

Bi-directional digital inputs/outputs



Relay outputs




8 each
(32 max)

Analog inputs



8 each
(16 max)

Digital temperature sensors


64 max total

Infrared output jacks



8 each
(16 max)

Infrared output zones



8 total

Serial ports


3 (1 RS-232, 2 RS-232 or RS-485)



Phone interface

1 line





Caller ID

1 line

Yes (if PC is running)


Yes (no PC required)

See our comparison to other home automation systems for more details.


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