Technical Overview
The Honeywell 621-9933C is a double-wide I/O rack power supply module designed for the Honeywell IPC 620 and TDC 2000 series distributed control systems. This module delivers reliable power to the I/O card file, ensuring stable operation for all connected logic and field devices. It features a selectable input voltage range of 115/230 VAC via a toggle switch under the component cover. A front-accessible fuse holder simplifies replacement, and a green LED labeled “5 VDC” confirms power availability at a glance. The “C” suffix indicates compliance with CE directives for low voltage and EMC requirements. This module installs in slots L and M of a full-size I/O card file or slots F and G of a half-size card file.
Technical Specifications
| Parameter | Specification |
|---|---|
| Manufacturer | Honeywell |
| Model Number | 621-9933C |
| Product Type | I/O Rack Power Supply Module |
| System Compatibility | IPC 620, TDC 2000 |
| Input Voltage | 115 VAC (85-132 VAC) or 230 VAC (170-250 VAC), selectable |
| Frequency | 47-63 Hz |
| Output Voltage | +5 VDC (10-15 A), +/-15 VDC (1.2-2 A) |
| Maximum Power Consumption | 110 VA |
| Power Fail Detection | 83V (115VAC) or 166V (230VAC) with 11.5ms delay |
| Fuse | 4A slow-blow (115VAC) or 2A slow-blow (230VAC) |
| Dimensions | 30 x 25 x 20 cm (11.8″ x 9.9″ x 7.9″) |
| Weight | 2.4 – 3.0 kg |
| Mounting | Slots L/M (full-size) or F/G (half-size) |
| Certifications | CE (73/23/IEC, 89/336/IEC), UL, CSA |
| Country of Origin | USA |
Key Features
High Output Capacity – This module delivers up to 15 A of +5 VDC and 2 A of +/-15 VDC, ensuring sufficient power for the entire I/O card file.
Selectable Input Voltage – Users can choose 115 VAC or 230 VAC operation via a toggle switch, accommodating various regional power standards.
Power Fail Detection – The module triggers a power fail signal at 83V (115VAC) or 166V (230VAC) with an 11.5 ms delay, allowing the system to perform an orderly shutdown.
CE Compliance – The “C” suffix denotes conformity with CE directives, ensuring safety and electromagnetic compatibility.
Applications
The Honeywell 621-9933C is ideal for industrial automation and process control systems requiring stable power distribution for I/O modules. It is commonly used in oil and gas, chemical processing, and power generation environments.
Details
| Weight | 0.2 kg |
|---|---|
| Dimensions | 85 × 65 × 30 mm |



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