Honeywell 621-9932 (6219932) Product Description

621-9932 (6219932) is a redundant power supply module for the 621 series, specifically designed for traditional DCS systems such as IPC 620/621, TDC 3000, and TPS, to build a 1+1 redundant power system, ensuring zero interruption and seamless switching of continuous power supply in case of a single power failure for the I/O rack.

I. Basic Information

Brand: Honeywell (Honeywell / ISSC)

Full Model: 621-9932 (6219932)

Series: 621 Series I/O Rack Power Supply

Type: Redundant Power Control / Switching Module

Production Status: Obsolete (Out of Production)

Weight: Approximately 0.65 kg

Size: Approximately 23 × 13 × 4 cm (width of single slot)

Installation: Plug-in into the dedicated redundant slots of the 621 series I/O rack

Power Supply: 24V DC Backplane (Own Power Consumption)

Common Suffixes:

621-9932R: ** Hot Swap ** Version

621-9932-RP: Refurbished / Repaired Version

II. Core Functions

1+1 Redundancy Management: Monitor dual main power supplies (such as 621-9931), achieve automatic switching without interruption

Fault Detection: Real-time monitoring of input voltage, output overload, over-temperature, short circuit

Automatic Switching: When the main power supply fails, switch seamlessly to the backup power supply within < 5ms

Status Synchronization: Load balancing of dual power supplies, status synchronization, fault alarm

Hot Swap Support: Replace faulty power supply / redundant module online without interrupting the system

System Compatibility: Compatible with IPC 620/621, UCN, TDC 3000, TPS, PlantScape

III. Technical Specifications

Redundant Architecture: 1+1 Full Redundancy (Main / Backup Automatic Switching)

Switching Time: < 5 milliseconds (no interruption, no data loss)

Monitoring Object: Three-phase output voltage monitoring of +5V, ±15V

Input Monitoring: Dual AC input voltage, frequency, phase detection

Output Protection: Overvoltage (OVP), Overcurrent (OCP), Short Circuit (SCP), Overheat (OTP)

Isolation Voltage: 3000V AC RMS (Channel - System Side)

Communication Interface: Redundant Status Bus (Connecting Dual Power Supplies)

LED Indicators: PWR, REDUND, ACTIVE, FAULT, SYNC

IV. Environmental Parameters

Operating Temperature: 0°C ~ +60°C

Storage Temperature: -40°C ~ +85°C

Humidity: 5–95% RH (No Condensation)

Vibration Resistance: 10–55 Hz, 0.7 mm Double Amplitude

Protection: IP20 (Installed in Cabinet)

Certifications: CE, UL, CSA, 94V-0 Flame Retardant

V. Status Indicators (LED)

PWR (Green): Module Power Supply is Normal

REDUND (Yellow): Redundancy Mode is Activated

ACTIVE (Green): Currently Main Power Supply Path

SYNC (Green): Dual Power Supply Status Synchronization

FAULT (Red): Redundancy Fault / Power Abnormal

VI. Typical Applications

621 Rack 1+1 Redundant Power Supply

TDC 3000 / TPS High-Reliability I/O Station

UCN Remote I/O Uninterrupted Power Supply

Chemical, Power, Metallurgy Critical Control Circuits

Old System Safety Upgrade (Non-Redundant → Redundant)

VII. Model Comparison (621 Series Power Supply) Table

Parameter 621-9932 621-9931 621-9934C

Function Retention management / switching Primary power output Upgrade primary power

Output No (only monitoring) +5V/8A; ±15V/0.6A +5V/10A; ±15V/1A

Redundancy  Management 1+1 redundancy  Requires 9932  to be configured  Requires 9932 to be configured

Hot-swappable  Supported (R version)  Supported  Supported

Status  Out of production  Out of production  In production

VIII. Common Faults and Troubleshooting

REDUND does not light up (not in redundancy mode)

Reason: Only one power supply, module not securely plugged in, redundancy disabled

Troubleshooting: Install dual power supplies → Reinsert → Configure redundancy parameters

FAULT red light constantly on

Reason: Main/standby power failure, voltage abnormality, module damage

Troubleshooting: Check dual power supply status → Replace faulty power supply → Replace redundant module

Frequent switching (ACTIVE flashes)

Reason: Power instability, overload of load, loose wiring

Troubleshooting: Reduce load → Tighten terminals → Replace power supply

IX. Related Models

Main power module: 621-9931 / 621-9934C

Non-redundant power: 621-9920 / 621-9921

Parallel bus module: 621-9929 / 621-9930

Serial communication module: 621-9928 / 621-9938

I/O rack: 621-7000 (14 slots) / 621-7010 (10 slots)