Overview
Manuals
Input Circuit Match
IOTA Wiring
Commissioning Checks
Features:
- Thirty-two coated channels for 24 VDC discrete input acquisition.
- Optical isolation with documented input thresholds and filtering delay.
- Supports documented nonredundant or redundant Series 8 IOTA arrangements.
8C-PDILA1 is the coated Series 8 24 VDC digital-input IOM. Honeywell specifies 32 channels, an 18-30 VDC DI power range, 95 mA module current, 13 VDC or 3 mA minimum ON sensing, 5 VDC or 1.2 mA maximum OFF sensing and 4.2-kilohm input impedance. The module provides direct or reverse indication, internal or external field-power selection, onboard excitation power and optical isolation within the IOM.
The electronic module must be paired with the correct coated termination assembly: 8C-TDILA1 for the nominal 9-inch nonredundant arrangement or 8C-TDILB1 for the nominal 12-inch redundant arrangement. Honeywell specifies 5 ms +/-20% delay across the input filter and isolation and 300-ohm maximum field resistance at 15 VDC for a guaranteed ON condition. These installed-system values do not establish packed dimensions or shipping weight.
The 8C-PDILA1 51454471-175 Honeywell Series 8 32-Channel 24 VDC Digital Input Module may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
Honeywell 8C-PDILA1 51454471-175 official technical documentation and product links.
This multi-page Honeywell technical document contains the exact model and its technical data. Apply the values to the supplied type number and verify its revision before installation.
Preserve the documented 18-30 VDC field-power range, ON and OFF thresholds, input impedance and filter delay. Confirm whether the installed channels use internal or external field power and whether direct or reverse indication is configured. Record every enabled channel and associated control action before removal.
Match the installed IOTA and redundancy architecture before moving conductors. Use the documented nonredundant or redundant coated termination assembly, then preserve field-power source, polarity, commons, channel numbering, shielding, grounding and terminal assignments. Compare the finished wiring with the approved cabinet drawings before energizing the field circuits.
Back up the controller database and photograph the complete 51454471-175 marking before replacement. After installation, stimulate each authorized input state, confirm configured indication direction, alarms and permissives, inspect channel quality and diagnostics, and prove both electronic paths when the redundant IOTA arrangement is installed.
