Function
The Digital Input Sequence of Events (DISOE) module accepts 24VDC discrete signals as discrete inputs. The inputs can be time-tagged to support 1ms resolution for Sequence of Events recording.
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.
- Optional Redundancy: Increases reliability.
- Internal or External Field Power Selection: Flexibility in power source.
- Onboard Excitation Power: No need for marshalling power.
- Direct / Reverse Input Indication: Clear input status.
- Galvanic Isolation: Ensures safety and signal integrity.
Specifications
Module: 8C-PDISA1 - Digital Input Sequence of Events, CoatedIOTA Modules
- 8C-TDILA1: Non-Redundant, Coated, 9"
- 8C-TDILB1: Redundant, Coated, 12"
- Normal: 20ms
- Fast: 5ms
Voltage Rating: 24 VDC
DI Power Voltage Range: 18 to 30 VDC
Module Current Rating: 95 mA
Galvanic Isolation
- Isolation Voltage: 1000 VAC RMS or ±1000 VDC (any input terminal voltage referenced to common)
- Technique: Optical (in IOM)
- Voltage: 13 VDC (min)
- Current: 3 mA (min)
- Voltage: 5 VDC (max)
- Current: 1.2 mA (max)
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
Module Removal and Insertion under Power: Supported
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