Overview
The Honeywell 621-2150 is a legacy 16-point digital output module designed for Honeywell distributed control systems. This 115VAC output module provides reliable, isolated digital switching for relays, contactors, solenoids, and other discrete field devices in industrial automation applications. Built with industrial-grade components and electrical isolation, the 621-2150 delivers consistent performance in manufacturing, petrochemical, and process control environments.
Key Features
- 16 independent 115VAC output points per module
- 2A per circuit rating with 12A maximum module capacity
- Zero-crossing switching to minimize electrical transients
- Electrical isolation between channels for noise immunity
- LED status indicators for output diagnostics
- Compact form factor with standard rack mounting
- Surge current protection: 15A non-repetitive over 2 cycles
Technical Specifications
- Output Voltage Rating: 115VAC, 50/60 Hz
- Output Points: 16 digital outputs
- Current per Circuit: 2A maximum
- Total Module Capacity: 12A
- On-State Voltage Drop: ≤2Vac at 2A
- Off-State Leakage Current: ≤5mA (typical)
- Surge Current: 15A, 2 cycle (non-repetitive)
- Fusing: 1 per circuit, 3A slow blow
- Weight: 1.61 lbs (0.73 kg)
- Dimensions: 120 mm × 80 mm × 50 mm
- Operating Frequency: 50/60 Hz
- Certifications: UL508, CE, CSA
Typical Applications
The Honeywell 621-2150 is commonly used in:
- Power plant and refinery automation systems
- Petrochemical and chemical processing control
- Manufacturing process automation and sequencing
- Discrete device control (relays, solenoids, actuators)
- Interlock logic implementation in DCS environments
- Maintenance and retrofit projects on legacy Honeywell systems
Compatibility & Replacements
Compatible With
- Honeywell 620/621 Series Logic Controllers
- Honeywell TDC 2000 Distributed Control Systems
- Honeywell TDC 3000 Distributed Control Systems
- Honeywell ISSC 600 control platforms
- Standard terminal block 621-9950 (required for installation)
Replaces / Drop-In Replacement For
- Original Honeywell 621-2150 units in legacy systems
- Verify compatibility with your system integrator before ordering.
Works With
- Honeywell DCS platforms (TDC 2000, TDC 3000)
- Standard 115VAC field device wiring and relay circuits
- Recommended wire gauge: 14-22 AWG
- Electrical isolation and noise immunity for industrial environments
