Overview
Manuals
IOM Match
Field I/O
EOL Path
Features:
- Nominal 9-inch nonredundant IOTA for the CC-PDIL51 input module.
- Thirty-two 24 VDC input channels in the documented paired assembly.
- Internal or external field-power selection without open-wire detection.
CC-TDIL51 is the nonredundant input/output termination assembly for the CC-PDIL51 Series C 24 VDC digital-input module. Honeywell's model table identifies the IOTA as a nominal 9-inch assembly, while CC-TDIL61 is the 12-inch redundant counterpart. The paired CC-PDIL51/CC-TDIL51 installation supports 32 discrete inputs, internal or external field-power selection, onboard excitation power and direct or reverse input indication. It is not an input-processing module by itself.
Electrical figures must be read at the paired-assembly boundary. Honeywell specifies 18-30 VDC field power, an ON threshold of 13 VDC or 3 mA, an OFF threshold of 5 VDC or 1.2 mA, 4.2-kilohm input impedance and a 5 ms filter-and-isolation delay. The 1000 VAC RMS galvanic-isolation rating is implemented optically in the CC-PDIL51 IOM. This execution has no open-wire detection, so that capability must not be copied from other Series C digital-input arrangements.
The CC-TDIL51 Honeywell 24 VDC Input IOTA may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
Honeywell CC-TDIL51 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.
Use CC-TDIL51 only as the documented nonredundant IOTA for CC-PDIL51. CC-TDIL61 is the redundant IOTA and has a different nominal assembly length. Verify the installed IOM, carrier position, IOTA keying, terminal numbering and complete catalog marking before replacement; do not treat this IOTA as the electronic input module.
Preserve the 24 VDC field-power arrangement, polarity, common references and every terminal assignment. The paired installation supports internal or external field power and has no open-wire detection. Verify the ON and OFF thresholds, field-circuit resistance, grounding and direct or reverse indication in the control database before reconnecting field devices.
Honeywell's May 2026 table lists the CC-PDIL51, CC-TDIL51 and CC-TDIL61 group as Phase Out with spares for installed systems and no use for greenfield or brownfield expansion. The listed expansion path uses CC-PDIL01 with CC-TDIL01 or CC-TDIL11. Treat that as an engineered migration path, not an unrestricted drop-in substitution.
