Honeywell Series 8 8C-PDISA1 SOE Digital Input Module

Overview:
The Honeywell 8C-PDISA1 module is designed to capture discrete 24 VDC signals with high precision timing for Sequence of Events (SOE) recording. It offers flexible operation modes, robust diagnostics, and enhanced reliability, making it ideal for critical industrial and process control applications.

Key Features:

• Operation Modes: Normal (20 ms PV scan), SOE (1 ms resolution, 20 ms PV scan), Low Latency (5 ms PV scan)

• Diagnostics: Advanced internal diagnostics for data integrity

• Redundancy: Optional redundancy for improved reliability

• Power Source: Supports internal or external field power sources

• Excitation Power: Onboard excitation power eliminates need for external marshalling

• Input Indication: Direct/Reverse input indication for clear signal status

• Isolation: Galvanic isolation ensures safety and signal integrity

Technical Specifications:

• Model Number: 8C-PDISA1

• Module Type: Digital Input Sequence of Events, Coated

• Input Channels: 32 discrete inputs

• Input Scan Rate: Normal: 20 ms, Fast: 5 ms

• SOE Digital Resolution: 1 ms

• Voltage Rating: 24 VDC

• Input Power Range: 18–30 VDC

• Module Current: 95 mA

• Galvanic Isolation: 1000 VAC RMS / ±1000 VDC, optical isolation

• ON Sense Voltage/Current: ≥13 VDC / ≥3 mA

• OFF Sense Voltage/Current: ≤5 VDC / ≤1.2 mA

• Input Impedance: 4.2 kΩ

• Absolute Delay: 5 ms ±20%

• Field Resistance (ON): ≤300 Ω @ 15 VDC

• Field Resistance (OFF): ≥30 kΩ @ 30 VDC

• Hot Swap Capability: Module can be inserted or removed under power

Compatible Modules:

• 8C-TDILA1: Non-redundant, Coated, 9"

• 8C-TDILB1: Redundant, Coated, 12"

Applications:

• Process Monitoring: Sequence of Events recording in process control

• Automation: Monitoring and automation of critical field devices

• Diagnostics: Power system and industrial plant diagnostics

FAQ:

• Q: What is the minimum resolution for SOE?
  A: The module supports 1 ms digital resolution for accurate event timing.

• Q: Can it operate with external field power?
  A: Yes, it can use either internal or external power sources.

• Q: Is it safe for harsh industrial environments?
  A: Yes, galvanic isolation and robust diagnostics ensure safe, reliable operation.