8C-PDIS01 | Honeywell | Series 8 Digital Input SOE Module

Module Overview

The 8C-PDIS01 is a high-performance Sequence of Events (SOE) Digital Input module integrated within the Honeywell Experion PKS Series 8 platform. Engineered for critical monitoring where timing precision is non-negotiable, this module captures state changes with millisecond accuracy. Its architectural design prioritizes signal integrity in high-interference environments, making it a standard choice for turbine control, emergency shutdown systems, and complex process interlocking.

Technical Parameters

The following specifications define the electrical and environmental limits of the 8C-PDIS01 hardware:

• Channel Density: 16 isolated input channels

• Nominal Input Voltage: 24 VDC

• Input Current Loading: 2 mA per channel at rated voltage

• SOE Time Stamp Precision: 1 ms resolution for event logging

• Galvanic Isolation: 2500 Vrms (tested channel-to-logic)

• Field Side Voltage Range: 18 VDC to 30 VDC

• ON State Threshold: > 13 VDC

• OFF State Threshold: < 5 VDC

• Operating Ambient Temperature: -40°C to +70°C (-40°F to +158°F)

• Storage Temperature Range: -55°C to +85°C

• Humidity Limits: 5% to 95% RH (non-condensing)

• Conformal Coating: Standard for Series 8 ruggedization

Application and Deployment

The 8C-PDIS01 module is typically deployed in scenarios requiring post-trip analysis or precise causal sequence tracking. By utilizing the 1ms time-stamping capability, engineers can reconstruct the exact order of field contact closures during a system upset. It mounts directly onto the Series 8 Input/Output Termination Assembly (IOTA), allowing for vertical airflow and efficient heat dissipation within the control cabinet.

Frequently Asked Questions

Does the 8C-PDIS01 require external power for the field inputs?Yes, the 24 VDC loop power must be provided to the field contacts, as the module acts as a sinking input device to detect the presence of voltage.

What is the difference between this SOE module and a standard Digital Input module?While a standard DI module scans inputs based on the controller's execution cycle, the 8C-PDIS01 features local processors that timestamp transitions immediately at the hardware level, bypassing controller scan-time jitter.