IMDSI14  DIGITAL INPUT MODULE BAILEY

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The IMDSI1
Digital Input Module is an interface used to bring 16 separate process field signals into the INFI 90 ® OPEN Strategic Process Management System. These digital inputs are used by control modules to monitor and control a process. This instruction explains the digital input module specifications and operation for the IMDSI12, IMDSI13, IMDSI14 and IMDSI15 modules. It details the procedures necessary to complete setup, installation, maintenance, troubleshooting and replacement of the module.
The IMDSI12 is the functional equivalent of the existing IMDSI02 module except that the IMDSI12 only offers a 17 millisecond debounce filter time. Any of the IMDSI1
modules may be used as a direct replacement for the IMDSI02 module, with the correct jumper settings. For example, an IMDSI13 module may be substituted for an IMDSI02 module that has all its jumpers set for 24 VDC with a 17 millisecond debounce filter.
The system engineer or technician using the IMDSI1
digital input module should read and understand this instruction before operating the module.

IMDSI14

The IMDSI1
Digital Input modules provide 16 separate digital signals into the INFI 90® OPEN system for processing and monitoring. It interfaces process field inputs with the INFI 90 OPEN Strategic Process Management System. A contact closure or switch is an example of a device that supplies a digital signal. Control modules provide the control functions; I/O modules provide the inputs and outputs. Four variations of the IMDSI1
modules are presented in this instruction:
• IMDSI12 – 24 VDC, 48 VDC, 125 VDC or 120 VAC inputs.
• IMDSI13 – 24 VDC inputs.
• IMDSI14 – 48 VDC inputs.
• IMDSI15 – 125 VDC or 120 VAC inputs.
The IMDSI12 is the functional equivalent of the existing IMDSI02 module with the restriction that the IMDSI02 offers selectable debounce filter times of 1.5 milliseconds (fast) and 17 milliseconds (slow) and the IMDSI12 module offers only the 17 milliseconds (slow) debounce filter time. The slow debounce filter is used in the majority of digital input applications.
Any of the IMDSI1
modules may be substituted in place of an IMDSI02 where appropriate jumper settings are used. For example, an IMDSI13 module may be substituted for an IMDSI02 module that has all its jumpers set for 24 VDC with a slow debounce filter.
Figure 1-1 shows the INFI 90 OPEN communication levels and the position of the digital input modules within these levels.

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