Rockwell Automation T8834 Trusted 20 Channel Analogue/Digital Isolated Input FTA - Manual

SDS-8834
Trusted
TM Industrial Control System
Trusted TM 20 Channel Analogue/Digital Isolated Input FTA - T8834
Issue 2 Jan 2006
GENERAL ASSEMBLY
DESCRIPTION
The Trusted
TM 20 Channel Isolated AI/DI FTA (Field Termination Assembly)
T8834 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 powered from the field or FTA as required, and
individually isolated.
The FTA allows the field loop to be wired in a variety of configurations. The
field device may be connected with either three or four wire power from the
FTA, or the device may be powered locally with the module input circuit
powered from the device. The device may source current to the loop, or sink
it to the loop or to the local power supply. Four terminals are provided to
allow this versatility.
The module input circuit is powered by current passed through a zener
diode. The field input loop is fed through a 100R precision resistor to provide
a voltage measurement in the module. 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 eighty screw terminations is used
for the field loops, with another forty terminations providing local isolated
power connections.
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
Versatile circuit operation
CON1
DIN41612
TB1 Screw Terminals
TB2 Screw Terminals
Channel 1
Circuit Channel 5
Circuit
Channel 2
Circuit
Channel 3
Circuit
Channel 4
Circuit
Channel 6
Circuit
Channel 7
Circuit
Channel 8
Circuit
Channel 9
Circuit
Channel 10
Circuit
Channel 11
Circuit
Channel 12
Circuit
Channel 13
Circuit
Channel 14
Circuit
Channel 15
Circuit
Channel 16
Circuit
Channel 17
Circuit
Channel 18
Circuit
Channel 19
Circuit
Channel 20
Circuit
T
B
3
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