Rockwell Automation T8802 Trusted 60 Channel 24V dc Digital Input FTA - Manual

SDS-8802
Trusted TM Industrial Control System
Trusted TM 60 Channel 24V dc Digital Input FTA - T8802
Issue 4 Jan 2006
GENERAL ASSEMBLY
DESCRIPTION
The Trusted
TM Field Termination Assembly (FTA) 24V dc Digital Input
60-Channel is designed to act as the main interface between a field device
generating a digital signal and the Trusted
TM Dual 24V dc Digital Input
Module T8402.
The field supply is derived from dual 24V dc feeds which are ‘commoned’ via
diodes on the FTA. The supply is then fed to each channel. Channels 0
and 61 on the Trusted
TM Dual 24V dc Digital Input Module will be configured
in the future to provide monitoring of the field power supply.
The supply voltage to the field is fed via a 50mA fuse. The incoming signal
(digital) from the field device is developed across a 5k/ resistor, then
connected to the appropriate input circuit on the Input Module. Line
monitoring components (if required) provide the necessary thresholds used
by the input module to detect the field loop/device status, i.e. open/short
circuit, alarm etc.
The cable linking the 60 channels on the input module to the FTA is
terminated at a 64-way socket. The dual dc power supplies are connected
to the FTA via a single 4-way connector. Ten 12-way connectors are used
for the field loops.
The VFTA is designed to be mounted on either of the TS32 or TS35 DIN
rails in the horizontal or vertical positions as required.
FEATURES
Sixty input channels per
FTA
Industry standard field
device connections (2-wire)
Standard DIN rail
compatibility
Simple installation and
connection
24V dc operation
Fused field power supply
per channel