Rockwell Automation T8833 Trusted 20 Channel Analogue/Digital Isolated Input FTA - Manual

SDS-8833
Trusted
TM Industrial Control System
Trusted TM 20 Channel Analogue/Digital Isolated Input FTA - T8833
Issue 2 Jan 2006
GENERAL ASSEMBLY
DESCRIPTION
The Trusted
TM 20 Channel Isolated AI/DI FTA (Field Termination Assembly)
T8833 is designed to act as the main interface between a field device
generating a 4-20mA signal and the Isolated Analogue Input Module T8433.
When used with a Trusted
TM T8433 TMR Isolated Analogue Input module
each of the inputs is loop powered and individually isolated.
The Input Module field circuit supply is fed via a zener diode in series with
the field input, thus powering the input circuit from the field. The field input
loop is then fed through a 100R precision resistor to provide a voltage
measurement in the module.
This means that input module operates on the loop power of the field
devices. This way each field device is isolated from the other devices and
from ground.
The cable linking the 20 channels on the input module to the FTA is
terminated at a 96-way socket. A row of forty screw terminations is used for
the field loops.
The FTA is designed to be mounted on either of the TS32 or TS35 DIN rails
in the horizontal or vertical positions as required.
FEATURES
Twenty isolated input
channels per FTA
Standard DIN rail
compatibility
Simple installation and
connection
Loop powered operation