Honeywell 621-6300 (6216300) Product Description

621-6300 (6216300) is an 8-channel, 5V DC source-type (Source) low-level digital output module (DO) for the Honeywell 621 series I/O, specifically designed for driving low-voltage logic devices and small loads. 

I. Basic Information

Brand: Honeywell (Honeywell / ISSC)

Full Model: 621-6300 (6216300)

Series: 621 Series I/O Module (IPC 620 / 621, TDC 3000, UCN System)

Type: 8-channel 5V DC Source Type (Source) Low-Level Digital Output Module (DO)

Production Status: Out of Production (Second-hand / Repaired / Reconditioned Channel)

Weight: Approximately 0.49 kg

Dimensions: Approximately 11.8 × 4.7 × 9.4 cm

Installation: Inserted into the 621 Series I/O Rack

Isolation: Channel - System Side Photoelectric Isolation

Common Suffix: No standard hot-swappable suffix (Does not support hot-swapping)

II. Core Functions

8 channels of 5V DC Source Output: Low voltage, small current signal output, suitable for low-level logic devices

Source Type (Source) Output Logic: Internal positive pole connection, output high level to drive load

Photoelectric Isolation: Isolation between channels, between channels and system side, high anti-interference

LED Status Indication for Each Channel: Real-time monitoring of output on/off

Short Circuit Protection + Overheating Automatic Shutdown: Built-in protection circuit to prevent overload damage

Small Current Drive Capacity: Maximum 0.5A per channel, suitable for driving small relays, indicators, logic circuits

Compatible Systems: IPC 620, IPC 621, TDC 3000, UCN, etc. legacy DCS

III. Electrical Specifications

Output Voltage: 5 V DC Nominal

Channel Count: 8 channels (Independent)

Output Type: Source Type / Positive Logic

Maximum Current per Channel: 0.5 A

Isolation Voltage: 1500V AC RMS (Channel - System Side)

Response Time: ≤ 1 ms

Power Consumption: Approximately 4 W

Power Supply: 5V DC (Backplane Bus Power Supply)

Leakage Current: ≤ 100 µA (Off State)

Protection Functions: Short Circuit Protection, Overheating Shutdown, Overcurrent Protection

IV. Environmental Parameters

Operating Temperature: 0°C ~ +60°C

Storage Temperature: -40°C ~ +85°C

Humidity: 5–95% RH (No Condensation)

Anti-Vibration: 10–55 Hz, 0.7 mm Double Amplitude

Protection: IP20 (Installed in Cabinet)

Certifications: CE, UL, CSA

V. Interfaces and Status

Field Interface: 50-pin D-Sub / European Terminal

LED Indicators:

PWR: Green (Normal Power Supply)

8 Channel LEDs: On = Bright, Off = Off

COM: Red (Common Port Abnormal / Bus Fault)

Bus Interface: 621 Rack-Specific Parallel Bus

VI. Typical Applications

Low-Level Logic Drive: 5V Logic Circuits, PLC Signals, Small Digital Devices

Indicator/Light Alarm Drive: 5V Indicators, Beepers, Small Alarm Devices

Micro Relay Control: Drive 5V Small Intermediate Relays

Data Communication Interface: 5V Level Signal Conversion, Communication Interface Control

Old System Upgrade: IPC 620 / 621, TDC 3000 System Low-Level DO Module Replacement

VII. Model Comparison (621 Series DO) Table

Parameters: 621-6300, 621-2100, 621-2150

Number of channels: 8 channels, 8 channels, 16 channels

Voltage: 5V DC, 24V DC, 24V DC

Output logic: Source type (Source), Source type (Source), Source type (Source)

Single-channel current: 0.5 A, 1 A, 0.5 A

Features: Low voltage, small current, 24V, large current, high density

VIII. Common Faults and Troubleshooting

No output from the channel (LED does not light up)

Reasons: Loose wiring, short circuit of the load, module not securely plugged in, abnormal bus

Troubleshooting: Measure terminal voltage, disconnect the load for testing, reinstall the module

LED constantly on (output locked)

Reasons: Internal module failure, abnormal bus data, overheating protection

Troubleshooting: Power off and restart, check bus communication, replace the module

Insufficient output current

Reasons: Overloaded load, module protection triggered, abnormal power supply

Troubleshooting: Reduce load current, check module temperature, confirm backplane power supply

IX. Related Models

24V DC source type output (8 points, 1A): 621-2100

24V DC source type output (16 points, 0.5A): 621-2150

24V DC open type output (8 points): 621-2200

115V AC output (8 points): 621-1200

Digital input: 621-4500, 621-4502, 621-4550

Analog input: 621-4000, 621-4001

Analog output: 621-5000, 621-5001