Xantech 791-40 Amplified Connecting Block
The HomeVision and HomeVision-Pro infrared transmit jacks can directly drive the Xantech 791-40 amplified connecting block.
Requires: Cable with 3.5mm mono or stereo plug (mono preferred) on one end, and wires on the other end.
Connections: Plug the plug into HomeVision's IR TX jack. Connect the wires to the 791-40 terminal block as follows:
| For Mono Plug: | - Striped wire (the plug's tip) to
"Input" - Plain wire (the plug's body) to "Ground" |
| For Stereo Plug: | - Red wire (the plug's tip) to "Input" - Ground wire (the plug's body) to "Ground" - Gray wire (the plug's center ring) is left unconnected |
NOTE: If the wires don't match these descriptions, use an ohmmeter to determine which
wires connect to the specified portions of the plug
WARNING:
DO NOT CONNECT HOMEVISION TO THE 791-40 USING A CABLE WITH 3.5mm PLUGS ON EACH END. THIS COULD DAMAGE HOMEVISION, THE 791-40, AND/OR THE 791-40's POWER SUPPLY.
The 791-40's "Aux" input jack accepts a 3.5mm stereo plug (the body is 12V, center ring is ground, and the tip is the IR TX input). This "Aux" input cannot be used with HomeVision for the following reasons:
 | If you plug a mono plug into the jack (regardless of whether the other end of the
cable is connected to anything or not), it will short the 791-40's power supply to ground.
It will overheat and may be permanently damaged. |
| If you plug a stereo plug into the jack and the other end of the cable into HomeVision, improper operation will result. The cable will connect the 791-40's 12V line to HomeVision's ground, causing significant voltage shifts. The 791-40 may still work erratically and/or it's LED may light when HomeVision is transmitting to it, but this setup should never be used. |
Refer to Note 5 in the 791-40's installation instructions for more information.
