Overview
Manuals
Controller Identity
Power and I/O
Successor Guidance
Features:
- Honeywell identifies 8C-PCNT02 as a coated Series 8 C300 controller.
- The 2015 specification lists FTE, two Series 8 I/O links and 24 VDC power.
- Honeywell's 2024 model note identifies 8C-PCNT03 as the replacement model.
The 2015 Honeywell Series 8 Controller and I/O Specification names 8C-PCNT02 and the coated 8C-TCNTA1 IOTA in the same C300 model table. Its controller specifications give a 24 VDC power requirement through the Series 8 power system, 320 mA module current, two Series 8 I/O links, FTE supervisory communications and an operating temperature of 0 to 60 °C. It describes a redundant C300 configuration as two controller modules and IOTAs linked by cable 51305980-836. Optional memory backup is separate. These are document- and release-specific values, not a universal promise for an arbitrary assembled system.
Honeywell's May 2024 Series 8 specification says 8C-PCNT02 was replaced by 8C-PCNT03 and gives compatibility context for the newer model. That note does not make a physical replacement automatically safe in a running plant. Confirm the actual controller and additional 51454363-275 markings, IOTA, firmware, installed Experion release, I/O assignments, redundancy arrangement and configuration backup. Obtain the current manufacturer procedure and site approval before any change. After an authorized replacement, test controller health, FTE paths, both I/O links, redundancy if fitted, diagnostics and affected control strategies. Do not transfer newer 8C-PCNT03 or 8C-PCNT05 capacities to this older model.
The 8C-PCNT02 51454363-275 Honeywell Series 8 C300 Controller may still be available for purchase and support from Moore Automated Company beyond End-Of-Life (EOL) by the manufacturer (OEM).
Honeywell 8C-PCNT02 51454363-275 documentation and reference links.
Direct Honeywell December 2015 Series 8 Controller and I/O Specification; page 5 lists 8C-PCNT02. The separate May 2024 Honeywell specification notes its 8C-PCNT03 successor.
Honeywell's December 2015 model table identifies 8C-PCNT02 as the coated Series 8 C300 controller and 8C-TCNTA1 as the coated controller IOTA. It is a control processor, not a 16-channel field I/O module. The manufacturer's reviewed PDFs do not map the additional 51454363-275 number shown on this website. Verify the actual unit label and official parts record before approving an exact-match spare.
The cited 2015 C300 table states 24 VDC supplied through the Series 8 power system, a 320 mA module current rating, two Series 8 I/O links, FTE supervisory networking and 0 to 60 °C operation. The IOTA and system power arrangement matter; these values do not authorize an improvised bench or field connection. Check the installed hardware and software release, link assignments and controller configuration before a controlled exchange.
Honeywell's May 2024 Series 8 specification says 8C-PCNT02 has been replaced by 8C-PCNT03. This is a manufacturer model-history statement, not a blanket approval for hot replacement or a promise that every installed application needs no migration work. Review the current Honeywell compatibility guidance, exact revision and system release, and preserve a tested application backup before any authorized substitution or commissioning work.
