4DP7APXID511 provides high voltage isolation per PCFA. Digital Inputs are filtered to reject contact bounce, random noise and (optional) high voltage surges. Digital Inputs maintain point configuration and current status in memory, accessible by other Data Hiway devices.

Digital input for HL PIU and MFC

• 16 Input points per card
• .10ms filter for each input point
• TTL input circuit power for each input point
• Card edge LED indicates power source and fuse are good

4DP7APXID511 Digital Input card detects and reports input changes on non-status-only points. Time tag and queue sequence-of-events changes, with one millisecond resolution between points in same PIU. For each status-only point, accept a target state and time-to-target code, and Report Command disagree changes based on reaching the target value within a specified time period (0 to 1023 seconds).

Digital Inputs:
• 4DP7APXID111 24V 1MS Filter Digital Input
• 4DP7APXID211 24V 24MS Filter Digital Input
• 4DP7APXID311 48V 1MS Filter Digital Input
• 4DP7APXID411 48V 24MS Filter Digital Input
• 4DP7APXID611 125V 1MS Filter Digital Input
• 4DP7APXID622 125v 24MS Filter Digital Input

The digital input cards are used to sense the status (open or closed, on or off) of an input point. They can be data base configured for notified status and input tracking, or for change-detect or sequence-of-events (SOE) operation. Digital Inputs differ primarily in filter response time, input voltage, and signal current direction, i.e., source current to IDll-4l, 61, and 62 but sink from ID5l.