Micromod MOD: 1800P - MOD 30ML Identity Module (Version 2) System, I/O and Communications Functions - Manual (Page 123)

Logic Functions - Book 1
DIGITAL INPUT MODULE BLOCK (DIM)
5-3
5.2 DIGITAL INPUT MODULE BLOCK (DIM)
The digital input module block serves as the data handling block for the digital input module.
A digital input module conditions a field signal and processes the signal through an on-board
select circuit which passes all digital data between the modules and the module blocks at the
base scan rate of 50 milliseconds. Input filtering and power-up conditions are determined by
the digital input function block (DI). The digital input module block identifies a single point
connection to one of the following digital input modules:
DIM 2004A Solid State Relay Input
2006A Unconditioned Digital Input
Block outputs are the data, data quality, and active and unacknowledged status of the block’s
diagnostic error. A functional block diagram of a digital input module block is shown in Figure
5-2. The displays used to configure the Digital Input Module block are shown in Figures 5-3
and 5-4.
Manual
I/O
Selection
Unlock
Discrete Value
Auto
Mode
Input Module
• Solid State Relay Input
• Unconditioned Digital Input
I/O Mismatch
(SUPP/ENAB)
Auto
Manual
BAD
GOOD
Unlock
Lock
Error Check
I/O Lock
(from IF Block)
Lock
GOOD
Diagnostic
Group
(NONE, 1 - 7)
I/O Comm. Error
Field
Result
Result
Result
Quality
Board Number
Slot Number
MODMMA
MODMMU
MODMM
FRQ
1
2
Figure 5-2. Digital Input Module Block, Functional Block Diagram