The HomeVision infrared transmit jack (IR TX) can directly drive the

The HomeVision infrared transmit jack (IR TX) can directly drive the
Using Sylva IO-8O8I-U Boards with HomeVision
Sylva Control Systems makes a series of input/output boards that can be used with HomeVision.
These boards provide 8 relay outputs and 8 opto-isolated inputs. Sylva has made three different
versions over the years that work with HomeVision. These are:
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IO-8O8I. This is the original version. It connects to HomeVision through the HomeVision
Multifunction Expansion Board using a short ribbon cable.
IO-8O8I/485. This version connects to HomeVision through an add-on HomeVision-Serial
RS485 port. This allows the IO-8O8I/485 board to be located a long distance from the
HomeVision unit.
IO-8O8I-U. This is the newest version and incorporates the capabilities of both of the earlier
boards. It can connect to the HomeVision Multifunction Expansion Board or a HomeVisionSerial RS485 port. It can also be controlled from an RS232 port, although HomeVision doesn’t
directly support this capability.
Sylva provides documentation with the IO-8O8I-U board, which you should read (although you can
ignore the “Serial Protocol” section, as HomeVision takes care of this automatically). This application
note provides more specific details on using the IO-8O8I-U board with HomeVision.
The setup process depends on whether you’re connecting to the Multifunction Expansion Board or a
HomeVision-Serial port, as detailed below.
Multifunction Expansion Board Connection
In this mode, the IO-8O8I-U board connects to the HomeVision Multifunction Expansion Board through
a 10-pin ribbon cable. The IO-8O8I-U documentation refers to this as the “I2C” mode. To use this
mode, make the following connections/settings on the 8O8I-U board:
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Connect a 12VDC power supply to the corresponding terminal block.
Use the address jumpers AD0, 1, 2, and 3 to set the board’s address, as follows:
- Address 0: All jumpers removed
- Address 1: Jumper 0 installed
- Address 2: Jumper 1 installed
- Address 3: Jumpers 0 and 1 installed
Remove the jumper labeled “I2C” (located right below the address jumpers).
Remove the jumper labeled “DLY” (located right below the I2C jumper).
Install the “Reset Cnfg” jumper on the “I2C” side.
Connect the 10-wire ribbon cable to Multifunction Expansion Board connecter H2 "I/O Board". Be sure
to align pin 1 on the connector with the red wire on the cable. Plug the other end of the cable into
either of the 10-pin connectors on the IO-8O8I-U board. Note that pin 1 (the red wire) goes towards
the left edge of the board. If you have multiple IO-8O8I-U boards, you can chain them together. Use
10-wire ribbon cables to connect the first board to the second board, the second board to the third
board, and so on.
You will also need to configure the HomeVision software. In the software, open the Expansion Board
Configuration Screen located under the "Configure" menu. Select the "Sylva I/O Boards" tab, then
place a checkmark next to the board(s) installed. Select the “Expansion Port” option.
Custom Solutions, Inc.
1997
P.O. Box 034206, Indialantic, Fl 32903
3 January
HomeVision-Serial RS485 Connection
In this mode, the 8O8I-U board connects to the HomeVision-Serial RS485 port. To use this mode,
make the following connections/settings on the IO-8O8I-U board:
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Connect a 12VDC power supply to the corresponding terminal block.
Use the address jumpers AD0, 1, 2, and 3 to set the board’s address, as follows:
- Address 0: All jumpers removed
- Address 1: Jumper 0 installed
- Address 2: Jumper 1 installed
- Address 3: Jumpers 0 and 1 installed
Install the jumper labeled “I2C” (located right below the address jumpers).
Remove the jumper labeled “DLY” (located right below the I2C jumper).
Install the “Reset Cnfg” jumper on the “Power Up” side.
Install the two “Serial Cnfg” jumpers vertically from the middle pins to the lower pins.
Connect the IO-8O8I-U board(s) to HomeVision-Serial. Follow the process described in the “RS-485
two-wire (half-duplex) mode” section of the HomeVision-Serial documentation. The connections are
summarized below:
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Connect the HomeVision-Serial TXA position to the IO-8O8I-U board’s “RS485 S-“ position
Connect the HomeVision-Serial TXB position to the IO-8O8I-U board’s “RS485 S+“ position
Connect the HomeVision-Serial TXA position to the HomeVision-Serial RXA position
Connect the HomeVision-Serial TXB position to the HomeVision-Serial RXB position
Connect the HomeVision-Serial Ground position to the IO-8O8I-U board’s “G“ position (next to
the 485 connections). This is required so both boards share the same ground.
The first two connections connect HomeVision-Serial to the IO-8O8I-U board, while the next two tie the
HomeVision-Serial transmit and receive lines together (which is required for a two-wire RS-485
connection). If you have more than one IO-8O8I-U board (you can have a maximum of four), connect
each to the HomeVision-Serial TXA and TXB positions.
You will also need to configure the HomeVision software as follows:
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Open the Expansion Board Configuration Screen located under the "Configure" menu. Select
the “Sylva I/O Boards” tab and configure the Sylva board(s) as follows:
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Check each board that you are using
Select the “Serial Port” option for the “Board connection method”
Select the HomeVision serial port the board(s) will be connected to. Each of the four
possible HomeVision serial ports is identified by a unique port number, as follows:
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HomeVision built-in port (RS-232):
HomeVision-Phone/Serial port (RS-232):
First HomeVision-Serial port (RS-232 or RS-485):
Second HomeVision-Serial port (RS-232 or RS-485):
Port 1
Port 2
Port 3
Port 4
Select the “Other” tab and configure the HomeVision serial port as follows:
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9600 baud (this is what the IO-8O8I-U boards use)
Timeout: None
Half-duplex (485 two-wire) mode
Board version: Either I or II, depending on which version you have. Note that if your
HomeVision-Serial documentation doesn’t mention a board version, then it’s the
earlier version, I.
Custom Solutions, Inc.
1997
P.O. Box 034206, Indialantic, Fl 32903
3 January
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