Rockwell Automation T8314 Trusted Fibre TR/TX Unit - Manual (Page 7)

Trusted
TM
Fibre TX RX Unit T8314
Issue 10 Sep 08 PD-T8314 7
1. Description
The Trusted TM Fibre TX/RX Unit T8314 is designed to be DIN rail mounted in the rear area of a
cabinet/bay containing the Trusted TM Controller Chassis T8100. A block diagram of the Unit is shown
in Figure 2 below:
Figure 2 Trusted TM Fibre TX/RX Unit Block Diagram
The Unit provides a communications connection interface between the Trusted TM Controller Chassis
and a remote Expander Chassis.
The Positive Emitter Coupled Logic (PECL) signal from the Trusted TM Expander Interface Module in
the Controller Chassis is connected to the Unit by a Trusted TM Expander Cable TC-302. The signal is
fed through an isolator, then filtered and terminated before being connected to the PECL input of the
fibre-optic transceiver. The fibre-optic signal is transmitted to a similar Unit at the remote end via a
Single Mode Fibre-Optic Cable. The fibre-optic transceiver at the remote end of the link converts the
signal back to a PECL signal before transmitting it to the Trusted
TM Expander Processor Module via a
filter/termination circuit, isolator and ‘F’ filter. Signals originating from the Trusted TM Expander
Processor Module in the remote Expander Chassis are processed in the same manner.