Connecting TH Modules

Installation—Accessories

To connect the Main Module to the TH Module:

1.Connect the first TH Module to either port marked A-Link on the rear of the Main Module, using a standard CAT5 (or equivalent) Ethernet patch cable (APC part number 3827BK-10 or equivalent). Do not use a crossover cable for connection.

A-Link is an APC proprietary CAN (Controller Area Network) bus. Devices compatible with A-Link are

Note not Ethernet devices and cannot coexist on an Ethernet bus with other networking devices, such as hubs and switches.

2.Connect the cable from the Main Module to the top A-Link connector labeled (indicating “input”) on the TH Module. Connect the bottom A-Link connector labeled (indicating “output”), to the next TH Module.

3.Plug an APC terminator (0W04161) into the unused A-Link port at each end of the string.

The Main Module does not have to be at the beginning of the chain of cascaded modules. You can cascade TH Modules from both A-Link ports of the Main Module. Always connect the Environmental Manager to the input connector on the TH Module, as described in step 2.

The maximum combined length of all

A-Link cables is 3280 ft (1000 m).

Note

It is not possible to cascade Main

Modules. Install only one Main

Module per system.

Note

10	Temperature/Humidity Module