ICS Triplex T8403 Digital Input Module

ICS T8403 is a digital input module produced by ICS Triplex, mainly used in industrial automation and process control systems. Each module has 40 triple modular redundant (TMR) input channels, providing a high degree of reliability and fault tolerance.

 

 

Manufacture	ROCKWELL ICS TRIPLEX
Model	T8403
Part Number	T8403
Description	Trusted Digital Input Module
Origin	USA / Mexico
Dimension	25*20*8cm
Weight	0.58kg

 

The Trusted® TMR 24 Vdc Digital Input module interfaces to 40 field input devices. Fault tolerance is achieved through a Triple Modular Redundant (TMR) architecture within the module for each of the 40 input channels.

 

Each field input is triplicated and the input voltage is measured using a sigma-delta input circuit. The resulting field voltage measurement is compared to user configurable threshold voltages to determine the reported field input state. When a line-monitoring device is installed at the field switch, the module can detect open and short circuit field cables. Line monitoring functions are independently configured for each input channel. The triplicated voltage measurement, coupled with onboard diagnostic testing, provides comprehensive fault detection and tolerance.

 

The module provides onboard Sequence of Events (SOE) reporting with a resolution of 1 ms. A change of state triggers an SOE entry. States are determined by voltage thresholds that can be configured on a per channel basis.

 

• 40 Triple Modular Redundant (TMR) input channels per module.

• Comprehensive, automatic diagnostics and self-test.

• Selectable line monitoring per channel to detect open circuit and short circuit field wiring faults.

• 2500 V impulse withstand opto/galvanic isolation barrier.

• Onboard Sequence of Events (SOE) reporting with 1 ms resolution.

• Module can be hot-replaced online using dedicated Companion (adjacent) Slot or SmartSlot (one spare slot for many modules) configurations.

• Front panel input status LEDs for each channel indicate input status and field wiring faults.

• Front panel module status LEDs indicate module health and operational mode (Active, Standby, Educated).

• TϋV Certified IEC 61508 SIL 3.

 

 

 

 

To install the module:

1. Ensure that the field cable assembly is installed and correctly located.

2. Release the ejector tabs on the module using the release key. Ensure that the ejector tabs are fully open.

3. Holding the ejectors, carefully insert the module into the intended slot.

4. Push the module fully home by pressing on the top and bottom of the module fascia.

5. Close the module ejectors, ensuring that they click into their locked position.

 

The module should mount into the chassis with a minimum of resistance. If the module does not mount easily, do not force it. Remove the module and check it for bent or damaged pins. If the pins have not been damaged, try reinstalling the module.

 

Status LEDs on the front of the Module provide visual indications of the module's operational status and field input status. Each LED is a tri-color LED of which for normal operation, only two colors are used; red and green. At the top and bottom of each Module is an ejector lever that is used to remove the Module from the Chassis. Limit switches detect the open/closed position of the ejector levers. The ejector levers are normally latched closed when the Module is firmly seated into the Controller or Expander Chassis 

 

Module status LEDs：

There are six module status LEDs on the Module Front Panel; three Healthy, one Active, one Standby, and one Educated. The Healthy indicators are controlled directly by each module slice. The Active, Standby, and Educated indicators are controlled by the FPU. The FPU receives data from each of the module slices. The FPU performs a 2oo3 vote on each data bit from the slices and sets the indicators accordingly.

 

I/O status LEDs：

There are 40 input channel status LEDs on the Module Front Panel, one for each field input. These indicators are controlled by the FPU. The FPU receives data from each of the module slices. The FPU performs a 2oo3 vote on each data bit from the slices and sets the indicators accordingly

 

The input status LED mode is dependent upon the voltage level of the field I/O signal. Each field input voltage is measured and compared to six threshold levels (four configurable and two fixed) which produce seven threshold bands. Each threshold band can be defined to have a particular indicator mode: off, green, red, flashing green, or flashing red.

 

The configurable voltage thresholds and LED modes allow users to customize the input measurement and status indications to suit individual application requirements. Without customization, the default indicator modes are suitable for digital inputs without line monitoring as described below: