The Packet Power WNC supports some models of APC automated transfer switches, depending on the version of WNC firmware. Base support is included in WNC firmware version 36.2 and newer. The following models are supported:
Other APC AP77XX devices may also work.
Required WNC Firmware
36.2 and newer
Preferred source and Actual source readings included in 36.10 and newer
The following APC resources will be useful for the WNC configuration. Note, this is not a full guide to the APC Automatic Transfer Switch interface.
Required ATS configuration
The device must be reset to factory defaults before connecting the WNC. This is accomplished via the web console or the serial console. Please follow the instructions in the ATS user manual (link above). The device must be configured with static networking settings for the ethernet port:
IP address: 192.168.149.149
Subnet Mask: 255.255.255.0
Default gateway: 192.168.149.1
This can be accomplished in a few ways:
If the device is currently connected to and accessible via an existing IP network, follow the instructions in the user manual section entitled "Administration: Network Features".
If the device is not already connected to an IP network, follow the instructions in the installation and quick start guide or user manual, in the section entitled "TCP/IP configuration methods" to configure the device with a static IP address.
Connect one end of an ethernet cable to the ethernet port on the APC ATS control panel:
On the rear of the WNC, connect the other end of the ethernet cable and the 5V DC power supply barrel plug.
ATS input A voltage
ATS input B voltage
ATS preferred source (0 = B, 1 = A)
Probe Status 9
ATS preferred source (OPEN = B, FAIL = A)
ATS actual source (0 = B, 1 = A)
Probe Status 10
ATS actual source (OPEN = B, FAIL = A)
ATS input A status (0 = ok, 1 = fail)
Probe Status 11
ATS input A status (OPEN = ok, FAIL = fail)
ATS input B status (0 = ok, 1 = fail)
Probe Status 12
ATS input B status (OPEN = ok, FAIL = fail)
ATS output current
ATS output line frequency