Rockwell Automation Publication ICSTT-RM447M-EN-P - July 2019
121
Module Overview and Specifications
Chapter 7
T9401/2 Digital Input
Module, 24 Vdc, 8/16 channel
The T9401/2 digital input module monitors eight (T9401) or sixteen
(T9402) isolated digital input channels and measures input voltages in the
range 0 V to 32 Vdc. Each channel supplies the digital state and voltage data to
the processor module for field device state, line monitoring and field fault
detection.
Input modules give module and individual channel status indications through
the front panel LEDs. These status indications are also connected to
application variables and viewed at the Workbench. Comprehensive
diagnostics at both system and module levels give clear fault indications which
help fast maintenance and repair.
Signal and power isolation circuits divide each input channel from the
remainder of the system, protecting the controller from field faults. An
independent watchdog arrangement monitors the module operation and gives
more fault containment by a shutdown mechanism should a fault occur.
These modules mate with the T9801/2/3 Digital input termination
assemblies. When digital input modules are installed in a dual or TMR
configuration they provide fault tolerant input functionality, enabling you to
replace a faulty input module without interrupting the channel data flow to the
processor modules.
T9401/2 Digital Input Module Specification
Table 27 - T9401/2 Digital Input Module Specification
Attribute
Value
Functional Characteristics
Input Channels
T9401: 8
T9402: 16
Performance Characteristics
Safety integrity level
IEC 61508 SIL 3
1
Safety level degradation
1oo1D, 1oo2D,2oo3D
Safety accuracy limit
1.0 Vdc
Self test interval
< 1 hour; system dependent
Sample update interval (no filter)
6 ms
Sequence of events
Event resolution
Time-stamp accuracy
1 ms
10 ms
Electrical Characteristics
Module Supply Voltage:
Voltage
Red 24 Vdc nominal; 18 Vdc to 32 Vdc range
Module supply power dissipation
T9401: 3.3 W (11.3 BTU/hr.)
T9402: 4.0 W (13.6 BTU/hr.)
Input data voltage range
0V to 32 Vdc
Maximum Slew Rate
2
Содержание Allen-Bradley AADvance T9110
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