8C-PDIS01 - Digital Input Sequence of Events, Coated

Product Type: Input / Output Model

Input Channels: 32

Input Channel Scanning:

• Normal: 20ms
• Fast: 5ms

Digital Input Resolution for Sequence of Events (SOE): 1ms

Galvanic Isolation:

• Voltage: 1500 VAC RMS or ±1500 VDC
• Isolation Technique: Optical (in IOM)

DI Power Voltage Range: 18 to 30 VDC

ON Sense Voltage/Current:

• 13 VDC (min) or 3 mA (min)

OFF Sense Voltage/Current:

• 5 VDC (max) or 1.2 mA (max)

Input Impedance: 4.2 KΩ

Absolute Delay Across Input Filter and Isolation: 5 ms ± 20%

Field Resistance for Guaranteed ON Condition: 300 Ω max @ 15 VDC

Field Resistance for Guaranteed OFF Condition: 30 KΩ min @ 30 VDC

Function

The Digital Input Sequence of Events (DISOE) module accepts 24VDC discrete signals as inputs. These inputs can be time-tagged to support 1ms resolution for the Sequence of Events.

Notable Features

• Three Modes of Operation:
  • Normal (20ms PV scan)
  • Sequence of Events (1ms resolution SOE, 20ms PV scan)
  • Low Latency (5ms PV scan)
• Extensive Internal Diagnostics: Ensures data integrity.
• Open Wire Detection: Available in Normal mode only.
• Optional Redundancy: Provides reliability.
• Field Power Selection: Can be internal or external.
• On-board Excitation Power: Eliminates the need for marshalling power.
• Non-incendive Field Power: Ensures safe operation in hazardous environments.
• Direct / Reverse Input Indication: Shows input status.