Block diagram, Electrical specification, Sds-8423 trusted – Rockwell Automation T8423 Trusted TMR 120V dc Digital Input Module User Manual
Page 2: Industrial control system trusted, Ics triplex, Mechanical specification, Environmental
 
SDS-8423 
Trusted
TM
Industrial Control System
Trusted
TM
TMR 120V dc Digital Input Module-T8423
ICS Triplex 
 
Technical data sheets are intended for 
information and guidance. The Company 
has a policy of continual product 
development and improvement. 
Specifications are subject to change 
without notice. For latest information, visit 
our Website:- 
www.icstriplex.com
BLOCK DIAGRAM
ELECTRICAL SPECIFICATION
Number of Inputs
40 Channels
Field Common Isolation
Sustained Working
±250V dc
Maximum Withstanding
±2.5kV dc
Input Voltage
Measurement Range
±150V dc
Maximum Withstanding
±250V dc
Channel Input Resistance
25k9
Power Consumption
15 to 18W
Sample Update Interval (no 
filter) 
5ms
Self-Test Interval
2 minutes
Sequence of Events
Event Resolution
1ms
Time-stamp Accuracy
±0.5ms
Turn-on/off Voltage
Configurable
Fusing
None, external if required
Intrinsic Safety
External barrier
Circuit Type
Fault tolerant, fully triplicated with optional 
line monitoring 
MECHANICAL 
SPECIFICATION 
 
Dimensions (HxWxD): 
241mm x 30mm x 300mm 
(9.5ins x 1.2ins x 11.8ins) 
 
Weight: 
1.13kg 
(2.5lbs) 
 
ENVIRONMENTAL
 
Operating Temperature: 
 
-5
°C to 60°C
(23
°F to 140°F)
 
Operating Humidity: 
5 to 95%, non-
condensing 
 
Vibration: 
10 to 57Hz 
±0.075mm
57 to 150Hz 1.0g 
 
Shock: 
15g, ½ sine wave, 11ms 
 
EMI (IEC 801): 
ESD 
Air discharge to 15kV 
Contact discharge to 8kV 
 
Radiated Fields 
10V/m, 27MHz to 
500MHz 
 
Transients and Bursts 
2kV, 2.5kHz for 
t=60 seconds 
Back Plane
Power Bus 1
Front Panel
T
M
R
In
te
rm
o
d
u
le
B
u
s
Opto Isolation Boundary
Serial Display Latches
Voted Status Display LEDs
Internal Voting Bus
Housekeeping
Module Temp
Supply Diag
DSP reference
Health
Indicators
Back Plane Power Bus 1
Back Plane Power Bus 2
Front Panel
Voting
Logic
HIU Power
Slice
Control A
Time Stamp
Slice
Control C
Time Stamp
Slice
Control B
Time Stamp
Slice A
Slice B
Slice C
IFIU
HIU
IFTU
FPDU
Bus
Interface
Bus
Interface
Bus
Interface
FPIU
Field Input
+V
- V
Line
Monitoring
Device
1-40
Field Logic
Control
Sigma Delta
ADC
Slice Power
Supply
Housekeeping
Field Logic
Control
Sigma Delta
ADC
Slice Power
Supply
Housekeeping
Field Logic
Control
Sigma Delta
ADC
Slice Power
Supply
Housekeeping
Redundant
Supply