CAN Bus Wiring

Equipment

Homer (must be provided with CAN Bus communication option).
DC power supply 24 V ±10% (see Power Supply Issues).
DC power supply cable.
Personal computer (PC) with Windows 95 or higher operating system (optimally Windows 7 or higher).
CAN Bus adapter. Currently usable adapters are:

Peak PCAN-USB Interface
Sontheim CANfox
Sontheim CAN USB Light Dongle (not advertised anymore but available on request)

Standard CAN Bus cable.

Connection

Fig. 6. Homer wiring diagram using CAN Bus interface.

Note on CAN Bus Adapters

Install the CAN Bus adapter device (including SW driver) on your PC according to manufacturer’s instructions. HomSoft supports the Peak PCAN-USB Interface, Sontheim CANfox and legacy type Sontheim CAN USB Light Dongle.

If using the Sontheim CAN USB Light Dongle, copy the CanApi.dll file from the Dongle installation package available on the manufacturer's web page to any of the following folders:

Windows central location for shared dlls (something like c:\Windows\System32). This is the best approach, as it covers all HomSoft upgrades and all users at once. For Windows 7 and higher you will need administrator rights to do that.
HomSoft Installation folder (something like c:\Program Files\S-Team\HomSoft\Ver5001). For Windows 7 and higher you will need administrator rights to do that.
HomSoft User Folder (applicable to HomSoft versions starting V5.0.0.0). This folder is created automatically when starting HomSoft for the first time. It looks something like

c:\Users\<username>\S-Team\HomSoft

HomSoft searches the folders in the same order as listed above.

If using the Peak PCAN-USB Interface, installation of the Windows driver places the dll files to appropriate folders and no further action is needed.

Note on CAN Bus Cable Termination

Terminal CAN devices (those at both ends of CAN cabling) should load the CAN cable with a 120-ohm resistor.

The Homer’s CAN Bus is not internally terminated (unless you expressly specify it in your order). In case of any doubt, simply measure the resistance between pins 2 and 7 of a Homer CAN connector. If the Homer is not internally terminated and if it should serve as a terminal device, the resistor must be connected externally (many available CAN cable assemblies have switchable resistors at both ends).

CAN Bus adapters may or may not have such resistor connected internally: check the resistance between pins 2 and 7 of its CAN D9 connector.