Rockwell Automation T8800 Trusted 40 Channel 24Vdc Digital Input FTA - Manual

SDS-8800
Trusted TM Industrial Control System
Trusted TM 40 Channel 24V dc Digital Input FTA -T8800
Issue 5 Jan 2006
ASSEMBLY
DESCRIPTION
The 40-channel T8800 Trusted
TM Field
Termination Assembly (FTA) is the primary
interface between the Trusted
TM TMR 24V dc
Digital Input module and the field device
(wiring) loop. The FTA provides the system
integrator with a high density, manageable set
of hardware, which minimizes the labour
required to assemble a Trusted
TM solution.
The FTA is made up of several components:
the interface cable connector and hood lock,
loop power distribution, dropping resistors,
and field input terminations.
To reduce integration time, the interface
cable, which connects the FTA and its I/O
module is pre-assembled and fitted with a pair
of specialized hoods. These hoods are used
to secure the cable in place. The FTA hood
fits into the metal slot retainer shown in the
illustration at left.
To facilitate the need for on-line
replacement of an unhealthy I/O
module, the interface cable is designed
to provide the user with two different
methods for on-line maintenance. The
first method involves the use of a dual
connector hood. The dual connectors
allocate an adjacent slot in the
Trusted
TM chassis for a hot-replacement
module. Refer to Figure 1 below for
more details regarding a dedicated
spare slot approach.
The second method of hot replacement
uses a “one-to-many” approach. This
feature is called the SmartSlot Link
(SSL). The SSL furnishes the method
to use a single I/O module slot as a hot
replacement slot. This configuration
reduces I/O chassis space by using a
single slot for hot replacement of all
modules of that type. In this case the I/O
cable has a second socket on the back
of the module end for connecting a
cable to the hot replacement slot.
Figure 1
FEATURES
40 TMR input points
per assembly
Easy to mount and
replace
Industry standard
field device
connections
Standard DIN rail
compatibility
Small physical size
Low cost
On-board LED for
loop power integrity
indication
Interface
Cable
Fi
el
d
D
ev
ic
e
Dual Hood
P
rim
ar
y
&
H
ot
S
pa
re
M
od
ul
es
TTA
Educa ted
Active
Hea lthy
T8 xx x Tr us te d TM R D ig ita lI np ut
1
3 5
7
9 11
13 15
17
19 21
23 25
27 29
31
33 35
37 39
Standby
2 4
6 8
10
12 14
16 18
20 22
24
26 28
30 32
34
36 38
40
Educa ted
Active
Hea lthy
T8 xx x Tr us te d TM R D ig ita lI np ut
1
3 5
7 9
11 13
15
17 19
21 23
25
27 29
31 33
35 37
39
Standby
2
4
6 8
10 12
14
16 18
20 22
24 26
28 30
32
34 36
38 40